Title of Invention	DEVICE FOR SUPPLYING FRESH AIR TO A TURBOCHARGED PISTON INTERNAL COMBUSTION ENGINE AND METHOD FOR OPEREATING THE SAME
Abstract	The invention relates to a device and a method for supplying fresh air to a turbocharged piston internal combustion engine (2) having a fresh gas line section (8) as an intake manifold which has to adjustable flap (60) and a first end port (10) for medium flowing in and a second end port (9) for medium flowing out, between which ports a pivotably mounted shaft (59) for the adjustable flap (60) is provided in the tubular wall (58), the flat (60) being coupled to an adjustment device (66) for the purpose of adjustment, and a compressed air port (42) with an opening (67) opening into the tubular interior (57) between the flat (60) and the second end port (9), wherein the compressed air port (42) interacts with a quantity regulating device (68) which has a valve (70) with a blocked position and any desired number of opened positions, and can be actuated by means of an electric input (69) which is connected to the terminal (39) of an electronic control unit (38), the adjustment device (66) of the flap (60) being forcibly activated by the quantity regulating device (68) and/or the electric control unit (38) in such a way that the fully opened position of the flap (60) is assigned a fully blocked position of the quantity regulating device (68).

Title of Invention

DEVICE FOR SUPPLYING FRESH AIR TO A TURBOCHARGED PISTON INTERNAL COMBUSTION ENGINE AND METHOD FOR OPEREATING THE SAME

Abstract

The invention relates to a device and a method for supplying fresh air to a turbocharged piston internal combustion engine (2) having a fresh gas line section (8) as an intake manifold which has to adjustable flap (60) and a first end port (10) for medium flowing in and a second end port (9) for medium flowing out, between which ports a pivotably mounted shaft (59) for the adjustable flap (60) is provided in the tubular wall (58), the flat (60) being coupled to an adjustment device (66) for the purpose of adjustment, and a compressed air port (42) with an opening (67) opening into the tubular interior (57) between the flat (60) and the second end port (9), wherein the compressed air port (42) interacts with a quantity regulating device (68) which has a valve (70) with a blocked position and any desired number of opened positions, and can be actuated by means of an electric input (69) which is connected to the terminal (39) of an electronic control unit (38), the adjustment device (66) of the flap (60) being forcibly activated by the quantity regulating device (68) and/or the electric control unit (38) in such a way that the fully opened position of the flap (60) is assigned a fully blocked position of the quantity regulating device (68).

Full Text	WO 2006/089779 PCT/EP2006/001737 Device for supplying fresh air to a turbocharged piston internal combustion engine and method for operating the same The invention relates to a device for supplying fresh air to a turbocharged piston internal combustion engine having a fresh gas line section as an intake manifold which has an adjustable flap and a first end port for flowing in and a second end port for flowing out, between which ports a pivotably mounted shaft for the adjustable flap is provided in the tubular wall, said flap being coupled to an adjustment device for the purpose of adjustment, a compressed air port with an opening leading into the tubular interior between the flap and the second end port. in addition, the invention also relates to a method for operating such a device. It is a known property of piston internal combustion engine with turbocharging that when the throttle is opened in the vehicle it reacts only with a certain degree of delay because the turbocharger can increase the supplied air quantity only slowly, which is known as a turbolag in the torque profile. DE-PS-39 06 312 discloses a method and structure for reducing or shortening the turbolag, in which case, while the diesel engine is accelerating a specific quantity of air is blown into the intake manifold from a compressed air accumulator, and the fuel injection quantity is. adapted to this. The turbocharged diesel engine is suitable particularly for town buses with an automatic transmission and compressed air brake system. The town buses perform a certain travel cycle by being able to predict the load and the rotational speed process of the diesel engine precisely, and in this way the blow-in time and the air quantity can be predetermined. The conditions with utility motor WO 2006/089779 - 2 - PCT/EP2006/001737 vehicles which are used in long distance traffic are quite different. These vehicles do not have any regular travel cycles and the payload varies within wide limits and the driving style of the driver can exhibit large differences. The above structure and method cannot eliminate these problems. Patent Abstracts of Japan, Vol. 1995, No. 07, August 31, 1995 and JP 07091267 A discloses a device for fresh air supply for a turbocharged piston internal combustion engine having a fresh air line section as an intake manifold. Here too, a flap is coupled to an adjustment device. In this known device it is, however, not ensured that sufficient compressed air remains in the compressed air store at any time for the other aggregates, such as braking system, as well. The object of the present invention is to provide a device and a method with which the blowing in of air can be adapted to the driving style and payload of the vehicle and at the same time the device can be installed as one mounted unit in various fresh gas line systems of diesel engines. The object is achieved on the basis of a device according to the preamble of claim 1 in conjunction with its characterizing features. In terms of method technology, the object is achieved by means of claim 5. The respectively referred back independent claims represent advantageous developments of the invention. The advantage of the invention results from the fact that a flap in the fresh gas line is activated under electronic control, that is to say not only automatically by the fresh gas pressure, as according to the prior art mentioned at the beginning, and that the activation is determined and processed AMENDED SHEET PCT/EP2006/001737 3021 III K PCT - 3 - electronically by the control unit, specifically as a function of the fresh gas pressure and preferably of the engine parameters. According to the invention, the compressed air port is provided with a quantity regulating device which has a valve which has a blocked position and any desired number of opened positions, and the quantity regulating device also has an electric/electronic input which is connected to the output of an electronic control unit, the input of the adjusting device of the flap being connected to the second output of the electronic control unit so that the fully opened position of the flap is assigned a fully blocked position of the quantity regulating device. The following outputs are preferably connected to the inputs of the electronic control unit: Output of the first pressure pickup whose pressure meter is arranged in the tubular interior between the flap and the first end port for flowing in; output of the second pressure pickup whose pressure meter is arranged in the tubular interior between the flap and the second end port for flowing out. According to one advantageous embodiment of the invention, in the electronic control unit, the torque request signal can originate from the following sources: accelerator pedal, traction controller, cruise controller, electric stability program, driving assistance system or other systems which feed an external torque request to the engine control system. 3A According to another advantageous embodiment of the invention, the adjustment device of the flap is also embodied as a position determining sensor for direct activation by the electronic control unit. The invention also relates to a method for improving the acceleration behavior and emission behavior of a vehicle piston internal combustion engine, in particular of a diesel engine with turbocharging, the device of which which has the purpose of supplying fresh air is provided with a compressed air accumulator in which compressed air is stored to be blown in in a regulated, temporary fashion into the intake line of the engine cylinder. WO 2006/089779 - 4 - PCT/EP2006/001737 According to the invention, the method contains the following method steps: determination of the torque request signal and feeding of the data to the electronic control unit, determination of the engine characteristic values and feeding of the values to the electronic control unit, - determination of the position of the flap and feeding of the values to the electronic control unit, - determination of the air pressure in the interior of the fresh gas line section between the first end port and flap or second end port and flap and feeding of the pressure values to the electronic control unit, determination of the air pressure in the interior of the intake line between the cylinder inlet valve and flap and feeding of the pressure value to the electronic control unit, as well as determination of the air pressure in the interior of the intake line between the flap and turbocompressor, and feeding of the pressure value to the electronic control unit, processing of the abovementioned data and the measured values in the electronic control unit in order to produce activation output signals for opening/closing the compressed air valve for the temporary blowing into the intake line, and simultaneous activation of the flap in the closing direction at the start of the blowing in process and in the opening direction at the end of the blowing in process. According to one advantageous embodiment of the method, the following additional method steps are carried out: determination of the average frequency of the driver's request for acceleration by the software in the control unit, regulation of the blowing in of air and activation of the flap in an adaptive fashion with respect to the determined average frequency of the driver's request so WO 2006/089779 - 5 - PCT/EP2006/001737 that the air consumption is kept within certain limits but without an abrupt change in the duration of the air blowing in process. The invention will be presented in detail below by means of an exemplary embodiment of a diesel engine and using drawings, in which: fig. 1 is a schematic illustration of a device for supplying fresh air to a turbocharged piston internal combustion engine, fig. 2 shows the fresh gas line section of the device according to fig. 1, fig. 3 is an axonometric image of the fresh gas line section seen from the end of the inflow, fig. 4 is an axonometric image of the fresh gas line section seen from the end of the outflow, and fig. 5 shows an axonometric image of the fresh gas line section seen from above. According to fig. 1, the turbocharged diesel engine 2 has six cylinders 3 in series, the intake lines 4 of which are connected to a collecting line 5 which has a connecting flange 7 to which a fresh gas line section 8 is connected by its second end port 9 for flowing out. The first end port 10 for flowing in is coupled by a line 11 to the outflow opening 12 of the charge air cooler 13 whose inflow opening 14 is coupled by a line 15 to the outflow opening 16 of the turbocompressor 17. An air filter 19 is connected to the inflow opening 18 of the turbocompressor 17 using the line 20. The turbocompressor 17 forms part of the exhaust gas turbocharger 22 whose exhaust gas turbine 23 is connected by its inflow opening 24 to the outflow WO 2006/089779 - 6 - PCT/EP2006/001737 opening 25 of the exhaust collecting pipe 26. The turbocompressor 17 and the exhaust gas turbine 23 are attached to the shaft 21. The cylinders 3 are connected by exhaust lines 27 to the exhaust collecting pipe 26. The outflow opening 28 of the exhaust gas turbine 23 is coupled to the exhaust pipe 29. The fuel supply to the cylinders 3 is provided by the injection nozzles 30 which are regulated by the line 31 from the first output 32 of the electronic control unit 38. The output 34 of the electronic control unit 33 is connected by the line 36 to the input 37 of the electronic control unit 38. The control unit 33 is provided with an activation element which is embodied in this exemplary embodiment as an accelerator pedal 35. The electric terminal 39 of the electronic control unit 38 is coupled to the electric terminal 41 of the fresh gas line section 8 by the collecting line 40. The fresh gas line section 8 has a compressed air port 42 which is connected by the line 43 to the outlet port 44 of the compressed air vessel 45. The feed port 46 of the compressed air vessel 45 is connected by the line 47 to the compressed air port 48 of the compressed air compressor 49. The pressure regulator 50 and air dryer 51 are installed in the line 47. The compressed air compressor 49 has an intake connector 52 which is provided with an air filter 53. The shaft 54 of the compressed air compressor 49 is connected to the main shaft 56 of the turbocharged diesel engine by the belt drive 55. Fig. 2 shows the fresh gas line section 8 in detail, said fresh gas line section 8 being embodied in a tubular fashion and having the first end port 10 and the second end port 9 between which there is an interior 57 which has a circular cross section. The interior 57 is enclosed before the wall 58 in which the WO 2006/089779 - 7 - PCT/EP2006/001737 shaft 59 of a flap 60 is mounted and lead through. The flap 60 divides the interior 57 into two parts, specifically the inflow space 61 which is produced between the first end port 10 and the flap 60, and the outlet space 62 which is produced between the second end port 9 and the flap 60. The flap 60 has one closed position and one fully opened position and any desired number of positions therebetween which are set by rotating the shaft 59. The adjustment device 66 is embodied in this exemplary embodiment as an electric motor and is equipped with an electric adjustment device input 74 and an output 65 which are correspondingly connected to the terminals of the collecting line 40 of the electronic control unit 38. The adjusting device 66 is supplied with current by the adjustment device input 74. The signal is obtained from the output 65 by means of the position of the flap 60. A compressed air inflow opening 67 is formed between the second end port 9 and the flap 60 in the wall 58, and the compressed air port 42 which is equipped with a quantity regulating device 68 is connected thereto. The quantity regulating device 68 also has a fully blocked position. The electric control input 69 of the quantity regulating device 68 which has a valve 70 is connected to the collecting line 40 of the electronic control unit 38. Similarly, the output 71 of the pressure pickup 72 which is attached to the wall 58, the pressure meter 73 of the pressure pickup 72 which extends into the outflow space 62 of the fresh gas line section 8 and a similar output 71 of the pressure pickup 72 which is attached to the wall 58 as well as the pressure meter 73 of the pressure pickup 72 which extends into the inflow space 61 are connected to the collecting line 40 of the electronic control unit 38. WO 2006/089779 - 8 - PCT/EP2006/001737 The arrangement 1 functions as follows: the cylinders of the turbocharged diesel engine are fed with fresh gas through the intake lines 4, collecting line 5, fresh gas line section 8, line 11, charge air cooler 13, line 15, turbocompressor 17 and air filter 19 if the rotational speed is constant. The exhaust gases leave the cylinders 3 through the exhaust lines 27, exhaust collecting pipe 26, exhaust gas turbine 23 and exhaust pipe 29. When the driver depresses the accelerator pedal 35 quickly so that the torque or engine speed is to be increased quickly, the turbocharged diesel engine 2 requires more fuel and more fresh gas. The additional fuel is fed into the cylinder 3 but the increase in the fresh gas quantity which is supplied by the exhaust gas turbocharger 22 remains insufficient. The pressure of the fresh gas is also low and it is continuously measured in the interior 57 by means of the pressure meter 73 and is fed to the electronic control unit 3 8 by the pressure pickup 72. In this operating state, the flap 60 is completely opened. The electronic control unit 38 will determine that the pressure is not increasing quickly enough in the interior 57, and determines, according to the control program, that additional air is to be blown in. The control program has predetermined specifications about the conditions when the air blowing in process is to start. At the start, the flap 60 is turned in the closing direction and the blowing in of compressed air from the compressed air vessel .45 into the outflow space 62 is enabled. The duration of the air blowing in process is also predefined by the control program which takes into account the pressure difference and the absolute pressure, which has been measured by the pressure meters 73. WO 2006/089779 - 9 - PCT/EP2006/001737 Any professional long distance driver or bus driver has his own driving style which requires average acceleration values, he uses specific shifting points of the transmission whose characteristic values can be determined, stored and worked out. This is carried out in the computing system of the electronic control unit 38 and used by software for the duration of the air blowing in process and activation of the flap at the electronic control unit 38. The software is intended to prevent the consumption of air from the vessel 45 from being so high that it adversely affects the braking safety since the vessel 45 is part of the entire compressed air system in which the most important part with respect to safety is the brake system. Nevertheless, an abrupt change in the acceleration assistance is not acceptable. This object is achieved in principle by virtue of the fact that the duration of the air blowing in process and activation of the flap is regulated in an adapative fashion by the frequency of the driver's request by the control software. As a result, the consumption of air is kept within certain limits but without an abrupt change in the duration of the air blowing in process. This avoids the driver sensing an unexpected change, i.e. reduction, in the acceleration assistance. WO2006/089779 - 10 - PCT/EP2006/001737 Reference numbers 1 Arrangement 2 Turbocharged diesel engine 3 Cylinder 4 Intake line 5 Collecting line 6 Cylinder block 7 Connecting flange 8 Fresh gas line section 9 Second "outflow" end port 10 First "inflow" end port 11 Line 12 Outflow opening 13 Charge air cooler 14 Inflow opening 15 Line 16 Outflow opening 17 Turbocompressor 18 Inflow opening 19 Air filter 20 Line 21 Shaft 22 Exhaust gas turbocharger 23 Exhaust gas turbine 24 Inflow opening 25 Outflow opening 26 Exhaust collecting pipe 27 Exhaust line 28 Outflow opening 29 Exhaust pipe 3 0 Injection nozzles 31 Line 32 Output 33 Random control unit 34 Output 35 Accelerator pedal 36 Line WO 2006/089779 - 11 - PCT/EP2006/001737 37 Input 3 8 Electronic control unit 3 9 Terminal 40 Collecting line 41 Terminal 42 Compressed air port 43 Line 44 Outlet port 45 Compressed air vessel 46 Feed port 47 Line 48 Compressed air port 49 Compressed air compressor 50 Pressure regulator 51 Air dryer 52 Intake connector 53 Air filter 54 Shaft 55 Belt drive 56 Main shaft 57 Interior 58 Wall 59 Shaft 60 Flap 61 Inflow space 62 Outflow space 63 Position determining sensor 64 Outer face 65 Output 66 Adjusting device 67 Compressed air inflow opening 68 Quantity regulating device 69 Electric control input 70 Valve 71 Output 72 Pressure pickup 73 Pressure meter 74 Adjusting device input PCT/EP2006/001737 3021 III K PCT -12 - New claims 1. A device for supplying fresh air to a turbocharged piston internal combustion engine (2) having a fresh gas line section (8) as an intake manifold which has an adjustable flap (60) and a first end port (10) for flowing in and a second end port (9) for flowing out, the flap (60) being coupled to an adjustment device (66) for the purpose of adjustment, and a compressed air port (42) with an opening (67) leading into the tubular interior between the flap (60) and the second end port (9), the compressed air port (42) interacting with a quantity regulating device (68) which has a valve (70) with a blocked position and any desired number of opened positions, and can be actuated by means of an electric input (69) which is connected to the terminal (39) of an electronic control unit (38), the adjustment device (66) of the flap (60) being forcibly activated by the quantity regulating device (68) and/or the electric control unit (38) in such a way that the fully opened position of the flap (60) is assigned a fully blocked position of the quantity regulating device (68) , and in that, on the one hand, the output (71) of the first pressure pickup (72) whose pressure meter (73) is arranged in the tubular interior (61) between the flap (60) and the first end port (10) and, on the other hand, the output (71) of the second pressure pickup (72) whose pressure meter (73) is arranged in the tubular interior (62) between the flap (60) and the second end port (9) are connected to the terminal (39) of the electronic control unit (38). 2. The device as claimed in claim 1, characterized in that, in the electronic control unit (3 8) , the torque request signal originates from the following sources: accelerator pedal, traction controller, cruise AMENDED SHEET PCT/EP2006/001737 3021 III K PCT - 13 - controller, electric stability program, means which feed an external torque request to the engine control system. 3. The device as claimed in claim 1, characterized in that the adjustment device (66) is embodied with a position determining sensor (63) for direct activation by the electric control unit (38). 4. A method for improving the acceleration behavior and emission behavior of a vehicle piston internal combustion engine, in particular of a diesel engine with turbocharging, a device as claimed in one of the preceding claims being provided with a compressed air accumulator in which compressed air is stored to be blown in in a regulated, temporary fashion into the fresh gas line section (8) of the engine cylinder, characterized by the following method steps: determination of the torque request signal and feeding of the data to the electronic control unit (38), determination of the engine characteristic values and feeding of the characteristic values to the electronic control unit (38), determination of the air pressure in the interior of the intake line between the cylinder inlet valve and flap (60) and feeding of the pressure value to the electronic control unit (38), as well as determination of the air pressure in the interior of the intake line between the flap (60) and turbocompressor, and feeding of the pressure value to the electronic control unit (38), processing of the abovementioned data and the measured values in the electronic control unit (38) in order to produce activation output signals for opening/closing the valve (70) for the AMENDED SHEET PCT/EP2006/001737 3021 III K PCT - 14 - temporary blowing into the fresh gas line section (8) and simultaneous activation of the flap (60) in the closing direction at the start of the blowing in process and in the opening direction at the end of the blowing in process. 5. The method as claimed in claim 4, characterized by the following method steps: determination of the average frequency of the driver's request for acceleration by the software in the control unit (38), AMENDED SHEET regulation of the blowing in of air and activation of the flap in an adaptive fashion with respect to the determined average frequency of the driver's request, in order to ensure that the air consumption is kept within defined limits, but without an abrupt change in the duration of the air blowing in process. The invention relates to a device and a method for supplying fresh air to a turbocharged piston internal combustion engine (2) having a fresh gas line section (8) as an intake manifold which has to adjustable flap (60) and a first end port (10) for medium flowing in and a second end port (9) for medium flowing out, between which ports a pivotably mounted shaft (59) for the adjustable flap (60) is provided in the tubular wall (58), the flat (60) being coupled to an adjustment device (66) for the purpose of adjustment, and a compressed air port (42) with an opening (67) opening into the tubular interior (57) between the flat (60) and the second end port (9), wherein the compressed air port (42) interacts with a quantity regulating device (68) which has a valve (70) with a blocked position and any desired number of opened positions, and can be actuated by means of an electric input (69) which is connected to the terminal (39) of an electronic control unit (38), the adjustment device (66) of the flap (60) being forcibly activated by the quantity regulating device (68) and/or the electric control unit (38) in such a way that the fully opened position of the flap (60) is assigned a fully blocked position of the quantity regulating device (68).

Full Text

WO 2006/089779 PCT/EP2006/001737
Device for supplying fresh air to a turbocharged
piston internal combustion engine and method for
operating the same
The invention relates to a device for supplying fresh
air to a turbocharged piston internal combustion engine
having a fresh gas line section as an intake manifold
which has an adjustable flap and a first end port for
flowing in and a second end port for flowing out,
between which ports a pivotably mounted shaft for the
adjustable flap is provided in the tubular wall, said
flap being coupled to an adjustment device for the
purpose of adjustment, a compressed air port with an
opening leading into the tubular interior between the
flap and the second end port.
in addition, the invention also relates to a method for
operating such a device.
It is a known property of piston internal combustion
engine with turbocharging that when the throttle is
opened in the vehicle it reacts only with a certain
degree of delay because the turbocharger can increase
the supplied air quantity only slowly, which is known
as a turbolag in the torque profile.
DE-PS-39 06 312 discloses a method and structure for
reducing or shortening the turbolag, in which case,
while the diesel engine is accelerating a specific
quantity of air is blown into the intake manifold from
a compressed air accumulator, and the fuel injection
quantity is. adapted to this. The turbocharged diesel
engine is suitable particularly for town buses with an
automatic transmission and compressed air brake system.
The town buses perform a certain travel cycle by being
able to predict the load and the rotational speed
process of the diesel engine precisely, and in this way
the blow-in time and the air quantity can be
predetermined. The conditions with utility motor

WO 2006/089779 - 2 - PCT/EP2006/001737
vehicles which are used in long distance traffic are
quite different. These vehicles do not have any regular
travel cycles and the payload varies within wide limits
and the driving style of the driver can exhibit large
differences. The above structure and method cannot
eliminate these problems.
Patent Abstracts of Japan, Vol. 1995, No. 07, August
31, 1995 and JP 07091267 A discloses a device for fresh
air supply for a turbocharged piston internal
combustion engine having a fresh air line section as an
intake manifold. Here too, a flap is coupled to an
adjustment device. In this known device it is, however,
not ensured that sufficient compressed air remains in
the compressed air store at any time for the other
aggregates, such as braking system, as well.
The object of the present invention is to provide a
device and a method with which the blowing in of air
can be adapted to the driving style and payload of the
vehicle and at the same time the device can be
installed as one mounted unit in various fresh gas line
systems of diesel engines.
The object is achieved on the basis of a device
according to the preamble of claim 1 in conjunction
with its characterizing features. In terms of method
technology, the object is achieved by means of claim 5.
The respectively referred back independent claims
represent advantageous developments of the invention.
The advantage of the invention results from the fact
that a flap in the fresh gas line is activated under
electronic control, that is to say not only
automatically by the fresh gas pressure, as according
to the prior art mentioned at the beginning, and that
the activation is determined and processed
AMENDED SHEET

PCT/EP2006/001737
3021 III K PCT
- 3 -
electronically by the control unit, specifically as a
function of the fresh gas pressure and preferably of
the engine parameters.
According to the invention, the compressed air port is
provided with a quantity regulating device which has a
valve which has a blocked position and any desired
number of opened positions, and the quantity regulating
device also has an electric/electronic input which is
connected to the output of an electronic control unit,
the input of the adjusting device of the flap being
connected to the second output of the electronic
control unit so that the fully opened position of the
flap is assigned a fully blocked position of the
quantity regulating device.
The following outputs are preferably connected to the
inputs of the electronic control unit:
Output of the first pressure pickup whose pressure
meter is arranged in the tubular interior between the
flap and the first end port for flowing in; output of
the second pressure pickup whose pressure meter is
arranged in the tubular interior between the flap and
the second end port for flowing out.
According to one advantageous embodiment of the
invention, in the electronic control unit, the torque
request signal can originate from the following
sources: accelerator pedal, traction controller, cruise
controller, electric stability program, driving
assistance system or other systems which feed an
external torque request to the engine control system.

3A
According to another advantageous embodiment of the
invention, the adjustment device of the flap is also
embodied as a position determining sensor for direct
activation by the electronic control unit.
The invention also relates to a method for improving
the acceleration behavior and emission behavior of a
vehicle piston internal combustion engine, in
particular of a diesel engine with turbocharging, the
device of which which has the purpose of supplying
fresh air is provided with a compressed air accumulator
in which compressed air is stored to be blown in in a
regulated, temporary fashion into the intake line of
the engine cylinder.

WO 2006/089779 - 4 - PCT/EP2006/001737
According to the invention, the method contains the
following method steps:
determination of the torque request signal and
feeding of the data to the electronic control unit,
determination of the engine characteristic values
and feeding of the values to the electronic control
unit,
- determination of the position of the flap and
feeding of the values to the electronic control unit,
- determination of the air pressure in the interior of
the fresh gas line section between the first end port
and flap or second end port and flap and feeding of the
pressure values to the electronic control unit,
determination of the air pressure in the interior of
the intake line between the cylinder inlet valve and
flap and feeding of the pressure value to the
electronic control unit, as well as determination of
the air pressure in the interior of the intake line
between the flap and turbocompressor, and feeding of
the pressure value to the electronic control unit,
processing of the abovementioned data and the
measured values in the electronic control unit in order
to produce activation output signals for
opening/closing the compressed air valve for the
temporary blowing into the intake line,
and simultaneous activation of the flap in the
closing direction at the start of the blowing in
process and in the opening direction at the end of the
blowing in process.
According to one advantageous embodiment of the method,
the following additional method steps are carried out:
determination of the average frequency of the
driver's request for acceleration by the software in
the control unit,
regulation of the blowing in of air and activation
of the flap in an adaptive fashion with respect to the
determined average frequency of the driver's request so

WO 2006/089779 - 5 - PCT/EP2006/001737
that the air consumption is kept within certain limits
but without an abrupt change in the duration of the air
blowing in process.
The invention will be presented in detail below by
means of an exemplary embodiment of a diesel engine and
using drawings, in which:
fig. 1 is a schematic illustration of a device for
supplying fresh air to a turbocharged piston
internal combustion engine,
fig. 2 shows the fresh gas line section of the
device according to fig. 1,
fig. 3 is an axonometric image of the fresh gas line
section seen from the end of the inflow,
fig. 4 is an axonometric image of the fresh gas line
section seen from the end of the outflow, and
fig. 5 shows an axonometric image of the fresh gas
line section seen from above.
According to fig. 1, the turbocharged diesel engine 2
has six cylinders 3 in series, the intake lines 4 of
which are connected to a collecting line 5 which has a
connecting flange 7 to which a fresh gas line section 8
is connected by its second end port 9 for flowing out.
The first end port 10 for flowing in is coupled by a
line 11 to the outflow opening 12 of the charge air
cooler 13 whose inflow opening 14 is coupled by a line
15 to the outflow opening 16 of the turbocompressor 17.
An air filter 19 is connected to the inflow opening 18
of the turbocompressor 17 using the line 20. The
turbocompressor 17 forms part of the exhaust gas
turbocharger 22 whose exhaust gas turbine 23 is
connected by its inflow opening 24 to the outflow

WO 2006/089779 - 6 - PCT/EP2006/001737
opening 25 of the exhaust collecting pipe 26. The
turbocompressor 17 and the exhaust gas turbine 23 are
attached to the shaft 21. The cylinders 3 are connected
by exhaust lines 27 to the exhaust collecting pipe 26.
The outflow opening 28 of the exhaust gas turbine 23 is
coupled to the exhaust pipe 29.
The fuel supply to the cylinders 3 is provided by the
injection nozzles 30 which are regulated by the line 31
from the first output 32 of the electronic control unit
38. The output 34 of the electronic control unit 33 is
connected by the line 36 to the input 37 of the
electronic control unit 38. The control unit 33 is
provided with an activation element which is embodied
in this exemplary embodiment as an accelerator pedal
35. The electric terminal 39 of the electronic control
unit 38 is coupled to the electric terminal 41 of the
fresh gas line section 8 by the collecting line 40.
The fresh gas line section 8 has a compressed air port
42 which is connected by the line 43 to the outlet port
44 of the compressed air vessel 45. The feed port 46 of
the compressed air vessel 45 is connected by the line
47 to the compressed air port 48 of the compressed air
compressor 49. The pressure regulator 50 and air dryer
51 are installed in the line 47. The compressed air
compressor 49 has an intake connector 52 which is
provided with an air filter 53. The shaft 54 of the
compressed air compressor 49 is connected to the main
shaft 56 of the turbocharged diesel engine by the belt
drive 55.
Fig. 2 shows the fresh gas line section 8 in detail,
said fresh gas line section 8 being embodied in a
tubular fashion and having the first end port 10 and
the second end port 9 between which there is an
interior 57 which has a circular cross section. The
interior 57 is enclosed before the wall 58 in which the

WO 2006/089779 - 7 - PCT/EP2006/001737
shaft 59 of a flap 60 is mounted and lead through. The
flap 60 divides the interior 57 into two parts,
specifically the inflow space 61 which is produced
between the first end port 10 and the flap 60, and the
outlet space 62 which is produced between the second
end port 9 and the flap 60. The flap 60 has one closed
position and one fully opened position and any desired
number of positions therebetween which are set by
rotating the shaft 59. The adjustment device 66 is
embodied in this exemplary embodiment as an electric
motor and is equipped with an electric adjustment
device input 74 and an output 65 which are
correspondingly connected to the terminals of the
collecting line 40 of the electronic control unit 38.
The adjusting device 66 is supplied with current by the
adjustment device input 74. The signal is obtained from
the output 65 by means of the position of the flap 60.
A compressed air inflow opening 67 is formed between
the second end port 9 and the flap 60 in the wall 58,
and the compressed air port 42 which is equipped with a
quantity regulating device 68 is connected thereto. The
quantity regulating device 68 also has a fully blocked
position. The electric control input 69 of the quantity
regulating device 68 which has a valve 70 is connected
to the collecting line 40 of the electronic control
unit 38.
Similarly, the output 71 of the pressure pickup 72
which is attached to the wall 58, the pressure meter 73
of the pressure pickup 72 which extends into the
outflow space 62 of the fresh gas line section 8 and a
similar output 71 of the pressure pickup 72 which is
attached to the wall 58 as well as the pressure meter
73 of the pressure pickup 72 which extends into the
inflow space 61 are connected to the collecting line 40
of the electronic control unit 38.

WO 2006/089779 - 8 - PCT/EP2006/001737
The arrangement 1 functions as follows: the cylinders
of the turbocharged diesel engine are fed with fresh
gas through the intake lines 4, collecting line 5,
fresh gas line section 8, line 11, charge air cooler
13, line 15, turbocompressor 17 and air filter 19 if
the rotational speed is constant. The exhaust gases
leave the cylinders 3 through the exhaust lines 27,
exhaust collecting pipe 26, exhaust gas turbine 23 and
exhaust pipe 29.
When the driver depresses the accelerator pedal 35
quickly so that the torque or engine speed is to be
increased quickly, the turbocharged diesel engine 2
requires more fuel and more fresh gas. The additional
fuel is fed into the cylinder 3 but the increase in the
fresh gas quantity which is supplied by the exhaust gas
turbocharger 22 remains insufficient. The pressure of
the fresh gas is also low and it is continuously
measured in the interior 57 by means of the pressure
meter 73 and is fed to the electronic control unit 3 8
by the pressure pickup 72. In this operating state, the
flap 60 is completely opened. The electronic control
unit 38 will determine that the pressure is not
increasing quickly enough in the interior 57, and
determines, according to the control program, that
additional air is to be blown in.
The control program has predetermined specifications
about the conditions when the air blowing in process is
to start. At the start, the flap 60 is turned in the
closing direction and the blowing in of compressed air
from the compressed air vessel .45 into the outflow
space 62 is enabled. The duration of the air blowing in
process is also predefined by the control program which
takes into account the pressure difference and the
absolute pressure, which has been measured by the
pressure meters 73.

WO 2006/089779 - 9 - PCT/EP2006/001737
Any professional long distance driver or bus driver has
his own driving style which requires average
acceleration values, he uses specific shifting points
of the transmission whose characteristic values can be
determined, stored and worked out. This is carried out
in the computing system of the electronic control unit
38 and used by software for the duration of the air
blowing in process and activation of the flap at the
electronic control unit 38. The software is intended to
prevent the consumption of air from the vessel 45 from
being so high that it adversely affects the braking
safety since the vessel 45 is part of the entire
compressed air system in which the most important part
with respect to safety is the brake system.
Nevertheless, an abrupt change in the acceleration
assistance is not acceptable.
This object is achieved in principle by virtue of the
fact that the duration of the air blowing in process
and activation of the flap is regulated in an adapative
fashion by the frequency of the driver's request by the
control software. As a result, the consumption of air
is kept within certain limits but without an abrupt
change in the duration of the air blowing in process.
This avoids the driver sensing an unexpected change,
i.e. reduction, in the acceleration assistance.

WO2006/089779 - 10 - PCT/EP2006/001737
Reference numbers
1 Arrangement
2 Turbocharged diesel engine
3 Cylinder
4 Intake line
5 Collecting line
6 Cylinder block
7 Connecting flange
8 Fresh gas line section
9 Second "outflow" end port
10 First "inflow" end port
11 Line
12 Outflow opening
13 Charge air cooler
14 Inflow opening
15 Line
16 Outflow opening
17 Turbocompressor
18 Inflow opening
19 Air filter
20 Line
21 Shaft
22 Exhaust gas turbocharger
23 Exhaust gas turbine
24 Inflow opening
25 Outflow opening
26 Exhaust collecting pipe
27 Exhaust line
28 Outflow opening
29 Exhaust pipe
3 0 Injection nozzles
31 Line
32 Output
33 Random control unit
34 Output
35 Accelerator pedal
36 Line

WO 2006/089779 - 11 - PCT/EP2006/001737
37 Input
3 8 Electronic control unit
3 9 Terminal
40 Collecting line
41 Terminal
42 Compressed air port
43 Line
44 Outlet port
45 Compressed air vessel
46 Feed port
47 Line
48 Compressed air port
49 Compressed air compressor
50 Pressure regulator
51 Air dryer
52 Intake connector
53 Air filter
54 Shaft
55 Belt drive
56 Main shaft
57 Interior
58 Wall
59 Shaft
60 Flap
61 Inflow space
62 Outflow space
63 Position determining sensor
64 Outer face
65 Output
66 Adjusting device
67 Compressed air inflow opening
68 Quantity regulating device
69 Electric control input
70 Valve
71 Output
72 Pressure pickup
73 Pressure meter
74 Adjusting device input

PCT/EP2006/001737
3021 III K PCT
-12 -
New claims
1. A device for supplying fresh air to a turbocharged
piston internal combustion engine (2) having a fresh
gas line section (8) as an intake manifold which has an
adjustable flap (60) and a first end port (10) for
flowing in and a second end port (9) for flowing out,
the flap (60) being coupled to an adjustment device
(66) for the purpose of adjustment, and a compressed
air port (42) with an opening (67) leading into the
tubular interior between the flap (60) and the second
end port (9), the compressed air port (42) interacting
with a quantity regulating device (68) which has a
valve (70) with a blocked position and any desired
number of opened positions, and can be actuated by
means of an electric input (69) which is connected to
the terminal (39) of an electronic control unit (38),
the adjustment device (66) of the flap (60) being
forcibly activated by the quantity regulating device
(68) and/or the electric control unit (38) in such a
way that the fully opened position of the flap (60) is
assigned a fully blocked position of the quantity
regulating device (68) , and in that, on the one hand,
the output (71) of the first pressure pickup (72) whose
pressure meter (73) is arranged in the tubular interior
(61) between the flap (60) and the first end port (10)
and, on the other hand, the output (71) of the second
pressure pickup (72) whose pressure meter (73) is
arranged in the tubular interior (62) between the flap
(60) and the second end port (9) are connected to the
terminal (39) of the electronic control unit (38).
2. The device as claimed in claim 1, characterized in
that, in the electronic control unit (3 8) , the torque
request signal originates from the following sources:
accelerator pedal, traction controller, cruise
AMENDED SHEET

PCT/EP2006/001737
3021 III K PCT
- 13 -
controller, electric stability program, means which
feed an external torque request to the engine control
system.
3. The device as claimed in claim 1, characterized in
that the adjustment device (66) is embodied with a
position determining sensor (63) for direct activation
by the electric control unit (38).
4. A method for improving the acceleration behavior
and emission behavior of a vehicle piston internal
combustion engine, in particular of a diesel engine
with turbocharging, a device as claimed in one of the
preceding claims being provided with a compressed air
accumulator in which compressed air is stored to be
blown in in a regulated, temporary fashion into the
fresh gas line section (8) of the engine cylinder,
characterized by the following method steps:
determination of the torque request signal and
feeding of the data to the electronic control unit
(38),
determination of the engine characteristic values
and feeding of the characteristic values to the
electronic control unit (38),
determination of the air pressure in the interior
of the intake line between the cylinder inlet
valve and flap (60) and feeding of the pressure
value to the electronic control unit (38), as well
as determination of the air pressure in the
interior of the intake line between the flap (60)
and turbocompressor, and feeding of the pressure
value to the electronic control unit (38),
processing of the abovementioned data and the
measured values in the electronic control unit
(38) in order to produce activation output signals
for opening/closing the valve (70) for the
AMENDED SHEET

PCT/EP2006/001737
3021 III K PCT
- 14 -
temporary blowing into the fresh gas line section
(8) and simultaneous activation of the flap (60)
in the closing direction at the start of the
blowing in process and in the opening direction at
the end of the blowing in process.
5. The method as claimed in claim 4, characterized by
the following method steps:
determination of the average frequency of the
driver's request for acceleration by the software
in the control unit (38),
AMENDED SHEET
regulation of the blowing in of air and activation
of the flap in an adaptive fashion with respect to
the determined average frequency of the driver's
request, in order to ensure that the air
consumption is kept within defined limits, but
without an abrupt change in the duration of the
air blowing in process.

The invention relates to a device and a method for supplying fresh air to a
turbocharged piston internal combustion engine (2) having a fresh gas line section
(8) as an intake manifold which has to adjustable flap (60) and a first end port (10)
for medium flowing in and a second end port (9) for medium flowing out, between
which ports a pivotably mounted shaft (59) for the adjustable flap (60) is provided
in the tubular wall (58), the flat (60) being coupled to an adjustment device (66) for
the purpose of adjustment, and a compressed air port (42) with an opening (67)
opening into the tubular interior (57) between the flat (60) and the second end port
(9), wherein the compressed air port (42) interacts with a quantity regulating device
(68) which has a valve (70) with a blocked position and any desired number of
opened positions, and can be actuated by means of an electric input (69) which is
connected to the terminal (39) of an electronic control unit (38), the adjustment
device (66) of the flap (60) being forcibly activated by the quantity regulating device
(68) and/or the electric control unit (38) in such a way that the fully opened position
of the flap (60) is assigned a fully blocked position of the quantity regulating device
(68).

Documents:

http://ipindiaonline.gov.in/patentsearch/GrantedSearch/viewdoc.aspx?id=2iV0mLOjQfw5FxppKLWLOg==&loc=wDBSZCsAt7zoiVrqcFJsRw==

« Previous Patent

Next Patent »

Patent Number

269744

Indian Patent Application Number

3147/KOLNP/2007

PG Journal Number

45/2015

Publication Date

06-Nov-2015

Grant Date

04-Nov-2015

Date of Filing

27-Aug-2007

Name of Patentee

KNORR-BREMSE SYSTEME FUR NUTZFAHRZEUGE GMBH

Applicant Address

MOOSACHER STR. 80, 80809 MUNCHEN

Inventors:

#	Inventor's Name	Inventor's Address
1	GERUM EDUARD	HIRSCHGARTENSTRASSE 1, 83026 ROSENHEIM
2	NEMETH, HUBA	GYEKENYES U. 57.1/5, H-1116 BUDAPEST

PCT International Classification Number

F02B 37/04,F02D 9/10

PCT International Application Number

PCT/EP2006/001737

PCT International Filing date

2006-02-24

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	10 2005 008 405.2	2005-02-24	Germany
2	10 2005 051 687.4	2005-10-28	Germany