Title of Invention

"A MUFFLER AND PARTICULATE SEPERATOR FOR INTERNAL COMBUSTION ENGINE EXHAUST"

Abstract

The present invention provides a muffler and particulate matter separator for an internal combustion engine exhaust comprising: an inlet pipe having holes on its surface said inlet pipe is covered with a coaxial housing containing sound absorbing heat resistant material characterized in that the said inlet pipe is connected tangentially to a hollow chamber having holes on its surface for separating particulate matter from gases entering and thereafter spinning due to vortex motion the said hollow chamber having holes is covered with a second housing containing porous fibrous heat resistance material to trap the particulate matter the said housing is further provided with ducts to create pressure gradient in the housing to allow the flow of particulate matter through the porous fibrous heat resistant material.

Full Text

The present invention relates to a Muffler and Particulate Separator For Internal Combustion Engine Exhaust. Background The exhaust from internal combustion engines contains particulate matter in the form of un-burnt fuel, oil and other particles. The exhaust from the engine escapes under pressure and is accompanied with a sudden expansion that results in the loud noise of exhaust that does not have a suitable silencer or muffler attached to it. The muffler attached to internal combustion engine results in the decrease of noise of exhaust as also in trapping some of the particulate matter in exhaust gases. However, the mufflers in use currently achieve the above objective but result in a certain amount of backpressure. The engine has to overcome this backpressure resulting in reduced useful power and increased fuel consumption. In order to match the engine noise and emission to the acceptable standards this backpressure is generally accepted as a necessary evil. The mufflers in current use also do not remove the particulate matter in exhaust emission and these are released to the atmosphere. The particles may be of very small size and may not be visible to the naked eye as smoke but these particles do contribute to the pollution resulting in dense fog. These particles also contribute to respiratory problems when they are inhaled by living beings. Once in circulation in the atmosphere these particles are carried to higher altitudes by convection currents, at high altitudes these particles act as nuclei for vapor condensation, resulting in bigger droplet formations that subsequently are the cause of poor distribution of rain and in some cases may lead to a cloud burst. Objectives of the invention The object of this invention is to remove particulate matter from the exhaust of internal combustion engines. Another objective of this invention is to effect the removal of particulate matter without increasing the backpressure experienced by the engine. Further objective of the invention is to reduce the noise of the exhaust without increasing backpressure. Summary of the invention To achieve the said objectives, the present invention provides a muffler and particulate matter separator for an internal combustion engine exhaust comprising: an inlet pipe having holes on its surface said inlet pipe is covered with a coaxial housing containing sound absorbing heat resistant material characterized in that the said inlet pipe is connected tangentially to a hollow chamber having holes on its surface for separating particulate matter from gases entering and thereafter spinning due to vortex motion the said hollow chamber having holes is covered with a second housing containing porous fibrous heat resistance material to trap the particulate matter , the said housing is further provided with ducts to create pressure gradient in the housing to allow the flow of particulate matter through the porous fibrous heat resistant material. The said inlet pipe forms a nozzle at the inlet to said hollow chamber to assist the exhaust gases to form vortex. The said porous fibrous heat resistant material in the second housing is glass wool or mixture of glass and steel wool. The ducts are provided by connecting the second housing to the axial mid section of the closed end of the hollow chamber. The ducts are provided from within the second housing towards the center of said hollow chamber The coupling means is provided to couple the said muffler to said engine exhaust Brief Description of the Drawings: The invention will now be described with reference to the accompanying drawings Fig. 1. shows a pipe (1) with perforations on its axial surface (2), the perforations being covered with a first housing (4) having sound absorbing heat resistant material (3) that fits coaxially over the tube. Fig. 2. shows the pipe (1), entering a cylindrical chamber (5) closed at one end, in a tangential direction. The cylindrical chamber (5), has holes on its surface (6), the holes being covered by a second housing (8) containing porous fibrous heat resistant material (7), that fits coaxially over the cylindrical chamber (5). Ducts (9) connect the mid section of the cylindrical chamber (5), to the enclosure of the housing (8). Duct (9A) also connects the axial mid section of the cylindrical chamber (5) to the enclosure of the housing (8) through a hole in the center of closed end of the cylindrical chamber. The cylindrical chamber (5), is axially open at one end (10). Detailed Description: Referring to the drawings, Fig. 1. Shows a pipe (1) with perforations on its axial surface (2), the perforations being covered with a sound absorbing heat resistant material (3) that is enclosed in a housing (4) that fits coaxially over the tube. Fig. 2. Shows the pipe (1), entering a cylindrical chamber (5) closed at one end, in a tangential direction. The cylindrical chamber (5) has holes on its axial surface (6), the holes being covered by porous fibrous heat resistant material (7), which is enclosed in a housing (8), which fits coaxially over the cylindrical chamber (5). Ducts (9) connect the axial mid section of the cylindrical chamber (5), to the enclosure of the housing (8). Duct (9A) also connects the axial mid section of the cylindrical chamber (5) to the enclosure of the housing (8) through a hole in the center of closed end of the cylindrical chamber. The cylindrical chamber (5) is axially open at one end (10). Working of the invention Referring to Fig. 1. Exhaust gases from the exhaust manifold of the engine enter the pipe (1), the axial perforation on the pipe (2), which are covered with sound absorbent and heat resistant material (3), reduces the sound of the exhaust. Referring to Fig. 2. The exhaust gases enter the cylindrical chamber (5), tangentially through the pipe (1). As the exhaust gases are at considerable speed they begin to spin in the cylindrical chamber with a high rotational velocity. Setting up a vortex action in which the particulate bearing exhaust gases are spun at high speeds. The high rotational speeds further assist the entry of exhaust emission through the tangentially placed pipe (1), reducing the pressure experienced by the engine in removing the exhaust gases. The centrifugal force generated by the rotational motion of the exhaust gases, pushes the exhaust gases radially outwards. The denser particulate laden exhaust gas is pushed by the centrifugal force through the holes (6) on the axial surface of the cylindrical chamber (5). The porous fibrous heat resistant material (7) traps the particulate matter in the gas. In side the enclosure (8) gas whose particulate matter has been removed by the' porous fibrous heat resistant material pass through the ducts (9) and or (9A) and are reintroduced into the low pressure area of the vortex, where again it begins to spin inside the cylindrical chamber. The lighter, particulate free exhaust gas continues to spin and move towards the open end of the cylindrical chamber (10) to be vented into the atmosphere or to be processed further in a catalytic converter etc. In the above manner particulate matter from exhaust gases is removed and trapped and the exhaust gases free of particulate matter moves out into the atmosphere or into another process such as catalytic conversion etc. I Claim: 1. A muffler and particulate matter separator for an internal combustion engine exhaust comprising: an inlet pipe(1) having holes on its surface (2) said inlet pipe (1) is covered with a coaxial housing (4) containing sound absorbing heat resistant material (3) characterized in that the said inlet pipe(1) is connected tangentially to a hollow chamber(5) having holes on its surface (2) for separating particulate matter from gases entering and thereafter spinning due to vortex motion the said hollow chamber (5) having holes is covered with a second housing (8) containing porous fibrous heat resistance material (7) to trap the particulate matter the said housing (8) is further provided with ducts (9) to create pressure gradient in the housing (8) to allow the flow of particulate matter through the porous fibrous heat resistant material (7). 2. A muffler and particulate matter separator for an internal combustion engine exhaust as claimed in claim 1 wherein said inlet pipe(1) forms a nozzle at the inlet to said hollow chamber(5) to assist the exhaust gases to form vortex. 3. A muffler and particulate matter separator for an internal combustion engine exhaust as claimed in claim 1 wherein said porous fibrous heat resistant material(7) in the second housing(8) is glass wool or mixture of glass and steel wool. 4. A muffler and particulate matter separator for an internal combustion engine exhaust as claimed in claim 1 wherein the ducts(9) or (9A) are provided by connecting the second housing(8) to the axial mid section of the closed end of the hollow chamber (5). 5. A muffler and particulate matter separator for an internal combustion engine exhaust as claimed in claim 1 wherein the ducts (9) are provided from within the second housing(8) towards the center of said hollow chamber(5). 6. A muffler and particulate matter separator for an internal combustion engine exhaust as claimed in claim 1 wherein coupling means is provided to couple the said muffler to said engine exhaust 7. A muffler and particulate matter separator for an internal combustion engine exhaust substantially as herein described with reference to the accompanying drawings.

Documents:

1114-DEL-2005-Abstract (19-09-2012).pdf

1114-DEL-2005-Abstract-(04-07-2011).pdf

1114-del-2005-abstract.pdf

1114-DEL-2005-Claims (19-09-2012).pdf

1114-DEL-2005-Claims-(04-07-2011).pdf

1114-del-2005-claims.pdf

1114-DEL-2005-Correspondence Others-(04-07-2011).pdf

1114-del-2005-Correspondence-others (19-09-2012).pdf

1114-del-2005-correspondence-others.pdf

1114-del-2005-description (complete).pdf

1114-del-2005-description (provisional).pdf

1114-del-2005-drawings.pdf

1114-del-2005-form-1.pdf

1114-del-2005-form-18.pdf

1114-del-2005-form-2.pdf

1114-del-2005-form-3.pdf

1114-del-2005-form-5.pdf

1114-del-2005-GPA (19-09-2012).pdf

1114-del-2005-gpa.pdf