| Title of Invention | IMPROVED CONTROL SYSTEM FOR OPERATION OF AN AUTOMOBILE POWERED BY AN ELECTRONICALLY CONTROLLED ENGINE AND AUTOMATIC TRANSMISSION AND METHOD OF CONTROLLING THEREOF |
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| Abstract | This invention relates to Improved Control system for Operation of an automobile powered by an electronically controlled engine and automatic transmission and method of controlling thereof. Said control system comprises of EMS, Common Rail Diesel Engine, TCU, Auto Transmission system & Accelerator Pedal sensor. Said Accelerator pedal sensor further comprises of a dual potentiometer sensor with two tracks. Wherein said Accelerator Pedal sensor is interfaced with EMS in turn EMS is again interfaced with said engine. TCU is interfaced with first track of the potentiometer of said Accelerator Pedal sensor and Auto transmission. |
| Full Text | FORM 2 THE PATENTS ACT 1970 (39 of 1970) & COMPLETE SPECIFICATION (See Section 10; rule 13) TITLE OF THE INVENTION Improved Control system for Operation of an Automobile Powered by an Electronically Controlled Engine and Automatic Transmission and Method of Controlling thereof APPLICANTS TATA MOTORS LIMITED, an Indian company having its registered office at Bombay House, 24 Homi Mody Street, Hutatma Chowk, Mumbai 400 001 Maharashtra, India INVENTORS Mr. Niranjan M, Mr. Khire Pradeep N , Mr. Krishnan S Indian nationals of TATA MOTORS LIMITED, an Indian company having its registered office at Bombay House, 24 Homi Mody Street, Hutatma Chowk, Mumbai 400 001 Maharashtra, India PREAMBLE TO THE DESCRIPTION The following specification particularly describes the invention and the manner in which it is to be performed. FIELD OF INVENTION This invention relates to automotive vehicle and more particularly to a control system for operation of an automobile powered by an Electronic Controlled Engine and auto transmission. BACKGROUND OF INVENTION In an automobile having auto transmission, it is necessary to get inputs from various sensors and then process the same to control the vehicle using actuators to control gear shifting, vehicle speed, drivability, etc. The conventional system has a common lever on fuel injection pump which is connected to manual accelerator pedal as well as auto transmission. Since the throttle pedal input is the only driver demand required for mechanical engine, the same input is used by Transmission Control unit (TCU) of automatic transmission to control the vehicle. As explained in fig. 1, the Fuel Injection Pump (FIP) in the Engine is directly connected to manual accelerator pedal through a mechanical cable. Whenever driver presses the mechanical accelerator pedal, the FIP determines the fuel quantity and timing and send to injectors through high pressure pipes. The same FIP is connected to TCU using a lever which is considered as throttle pedal input by TCU and acts accordingly, to change the transmission ratio. The drawback associated with the said conventional mechanical system is that the performance of the vehicle will be poor due to mechanical fuel injection system and the advantage of auto transmission is not exploited. On the other side, the vehicle having electronically controlled engine and auto transmission will have CAN (Controller Area Network), wherein all the sensor inputs are shared between EMS (Engine Management System) and TCU of automatic transmission. TCU receives the signal from various sensors and acts accordingly to change the transmission ratio. Similarly EMS ECU receives the signals from various engine sensors and controls the amount of torque required, amount of fuel required etc. for a particular cycle. The CAN acts as a communicating port for the TCU and EMS ECU. The signals are thereby shared between the ECUs and they act accordingly which is clearly shown in fig. 2. The drawback associated with the said Electronic control system with CAN is that the control system is very complex in nature and which is very expensive and may not be feasible for many markets. In order to overcome the above said drawbacks, this invention is devised. OBJECTS OF INVENTION The main object of this invention is to devise a Control system which will be able to give better performance / benefits with out using CAN. In other words, the object of the invention is to operate both the EMS ECU & TCU without CAN and with single accelerator pedal sensor. Yet another object of this invention is to devise a control system for better drivability which is simple in construction and cost effective. STATEMENT OF INVENTION Improved Control system for Operation of an automobile powered by an electronically controlled engine and automatic transmission comprises of Engine Management System, Common Rail Diesel Engine, Transmission Control Unit, Auto Transmission and accelerator pedal sensor wherein said accelerator pedal sensor is interfaced with Engine Management System, said Engine Management System is further interfaced with said engine, said Transmission Control Unit is interfaced with said Accelerator pedal sensor and Auto transmission. Improved Control system for Operation of an automobile powered by an electronically controlled engine and automatic transmission wherein said accelerator pedal sensor comprises of a dual potentiometer sensor with two tracks. Improved Control system for Operation of an automobile powered by an electronically controlled engine and automatic transmission wherein said accelerator pedal sensor is interfaced with Engine Management System through two tracks. Improved Control system for Operation of an automobile powered by an electronically controlled engine and automatic transmission wherein said Transmission Control Unit is interfaced with said Accelerator pedal sensor through first track. Method of controlling Operation of an automobile powered by an electronically controlled engine and automatic transmission comprises of a. Providing driver demand inputs to engine management system of common rail diesel engine; b. Providing accelerator pedal inputs to transmission control unit of auto transmission; c. Processing accelerator pedal inputs d. Coordinating the operations between common rail diesel engine and auto transmission. BRIEF DESCRIPTION OF INVENTION Improved Control system for Operation of an automobile powered by an electronically controlled engine and Automatic transmission in accordance with this invention basically comprises of EMS, Common Rail Diesel Engine, TCU, Auto Transmission system & Accelerator Pedal sensor. Said Accelerator pedal sensor further comprises of a dual potentiometer sensor with two tracks. Wherein said Accelerator pedal sensor is interfaced with EMS, in turn EMS is again interfaced with said engine. TCU is interfaced with first track of the potentiometer of said Accelerator pedal sensor and Auto transmission. BRIEF DESCRIPTION OF DRAWINGS Fig. 1 shows the block diagram of the Conventional Mechanical Control System Fig. 2 shows the block diagram of Electronic control system having integrated EMS ECU and TCU through CAN BUS Fig. 3 shows Control system for Operation of an automobile powered by an electronically controlled engine and Automatic transmission in accordance with this invention. DETAILED DESCRIPTION OF INVENTION Referring now to the drawings wherein the showings are for the purpose of illustrating a preferred embodiment of the invention only, and not for the purpose of limiting the same Referring to Fig. 3 Improved Control system for Operation of an automobile powered by an electronically controlled engine and Automatic transmission in accordance with this invention basically comprises of EMS, Common Rail Diesel Engine, TCU, Auto Transmission system & Accelerator Pedal sensor. Said Accelerator pedal sensor further comprises of a dual potentiometer sensor with two tracks (Rl, R2). In the EMS system, input from accelerator Pedal sensor is very much important for optimizing the engine performance. Similarly TCU of Auto transmission system requires input from accelerator pedal sensor. Single accelerator Pedal sensor is used in this vehicle control system for both EMS & TCU. This improvement in control system gives the same benefit of a CAN compatible control system at much lower cost & less complexity. Common rail is key to better diesel engine performance, since more accurate high pressure injection results in more efficient fuel combustion. It also injects the fuel only when it is required thereby increasing fuel efficiency. The common rail engine uses a high-pressure pump and a common rail for supplying all the cylinders with high-pressure diesel through the electronically-controlled fuel injectors. High pressure results in better atomisation which leads to complete combustion. The ECU of EMS is a Microprocessor which keeps the engine functioning at its optimal capacity. It continuously receives various signals from sensors like temperature, air pressure, vehicle speed, etc., to calculate the timing and quantity of fuel required by the engine. Besides, the ECU also controls Engine cooling electric fans, Air conditioner, etc., TCU is also a microprocessor which receives signals from various sensors and also acts accordingly to change the Transmission ratio, thereby enhancing the drivability of the vehicle. The accelerator pedal sensor is a dual potentiometer sensor and consists of two tracks (Rl, R2). Both the tracks are connected to ECU of EMS, because EMS ECU requires input from both the tracks of the accelerator pedal sensor and determines the power required from the engine and adjusts the fuel quantity injected to meet the vehicle demand. In addition to the above connection, the first track (Rl) is connected to TCU parallely which is considered as throttle pedal input by TCU and acts accordingly to change the transmission ratio. Movement in accelerator pedal changes the resistance, which in turn changes the voltage across potentiometer sensing point. This change in voltage is sensed by EMS, thus it determines the equivalent torque required and the equivalent amount of fuel to be used. The accelerator pedal sensor communicates the ECU of EMS the position of the accelerator pedal (how far and how fast the pedal has been pressed). The foregoing description is a specific embodiment of the present invention. It should be appreciated that this embodiment is described for purpose of illustration only, and that numerous alterations and modifications may be practiced by those skilled in the art without departing from the spirit and scope of the invention. It is intended that all such modifications and alterations be included insofar as they come within the scope of the invention as claimed or the equivalents thereof. ABSTRACT Improved Control system for Operation of an Automobile Powered by an Electronically Controlled Engine and Automatic Transmission and Method of Controlling thereof This invention relates to Improved Control system for Operation of an automobile powered by an electronically controlled engine and Automatic transmission and method of controlling thereof. Said control system comprises of EMS, Common Rail Diesel Engine, TCU, Auto Transmission system & Accelerator Pedal sensor. Said Accelerator pedal sensor further comprises of a dual potentiometer sensor with two tracks. Wherein said Accelerator pedal sensor is interfaced with EMS, in turn EMS is again interfaced with said engine. TCU is interfaced with first track of the potentiometer of said Accelerator pedal sensor and Auto transmission |
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2231-MUM-2007-ANNEXURE 1(27-5-2014).pdf
2231-MUM-2007-CLAIMS(AMENDED)-(27-5-2014).pdf
2231-MUM-2007-CLAIMS(AMENDED)-(9-5-2012).pdf
2231-mum-2007-correspondence(29-11-2007).pdf
2231-MUM-2007-CORRESPONDENCE(8-1-2014).pdf
2231-mum-2007-correspondence-received.pdf
2231-mum-2007-description (complete).pdf
2231-MUM-2007-DRAWING(-27-5-2014).pdf
2231-MUM-2007-FORM 13(27-5-2014).pdf
2231-MUM-2007-FORM 13(9-5-2012).pdf
2231-mum-2007-form 18(29-11-2007).pdf
2231-mum-2007-form 2(title page)-(8-11-2007).pdf
2231-mum-2007-form 3(8-11-2007).pdf
2231-mum-2007-form 8(29-11-2007).pdf
2231-mum-2007-form 9(29-11-2007).pdf
2231-MUM-2007-GENERAL POWER OF ATTORNEY(9-5-2012).pdf
2231-MUM-2007-MARKED COPY(27-5-2014).pdf
2231-MUM-2007-MARKED COPY(9-5-2012).pdf
2231-MUM-2007-REPLY TO EXAMINATION REPORT(9-5-2012).pdf
2231-MUM-2007-REPLY TO HEARING(27-5-2014).pdf
2231-MUM-2007-SPECIFICATION(AMENDED)-(27-5-2014).pdf
2231-MUM-2007-SPECIFICATION(AMENDED)-(9-5-2012).pdf
| Patent Number | 261001 | ||||||||||||
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| Indian Patent Application Number | 2231/MUM/2007 | ||||||||||||
| PG Journal Number | 23/2014 | ||||||||||||
| Publication Date | 06-Jun-2014 | ||||||||||||
| Grant Date | 30-May-2014 | ||||||||||||
| Date of Filing | 08-Nov-2007 | ||||||||||||
| Name of Patentee | TATA MOTORS LIMITED | ||||||||||||
| Applicant Address | BOMBAY HOUSE, 24 HOMI MODY STREET, HUTATMA CHOWK, MUMBAI | ||||||||||||
Inventors:
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| PCT International Classification Number | H01L29/00 | ||||||||||||
| PCT International Application Number | N/A | ||||||||||||
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