Title of Invention

AN IMPROVED OIL SEPARATOR FOR AN INTERNAL COMBUSTION ENGINE

Abstract

This invention relates to an oil separator for an internal combustion engine. Oil separator which conventionally uses impact technology for the separation of oil particles from the blow by gases of the internal combustion engine. Due to the impact of high velocity blow by gases with an impact plate through small holes, kinetic energy of the blow by gases is reduced which separates oil from the blow by gases. In the present invention, three offset plates have been used as baffles. The two of them act as impact plates to fully utilize the space available. All three in total act as baffles to divert the fluid flow directions. In place of the constant diameter housing of the oil separator, a divergent type housing is used which helps to further reduce the velocity of the gases which facilitates oil separation. This in total improves the oil separation efficiency. Blow by gases are drawn from cylinder head cover into the inlet side of oil separator. The separated oil drains back into the oil sump below oil level. Substantially oil free gas is then introduced to the air induction system of the engine.

Full Text

FORM 2 THE PATENTS ACT 1970 (39 of 1970) & THE PATENTS RULES, 2003 COMPLETE SPECIFICATION (See Section 10; rule 13) TITLE OF THE INVENTION A novel oil separator for an internal combustion engine 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. Bakare Amar Sharad and Mr. Kanase Dattatraya Ramchandra both 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 an internal combustion engine and more particularly it relates to a novel oil separator for Internal Combustion Engine which separates entrained lubricating oil from the blow by gases. BACKGROUND OF THE INVENTION An oil separator for the blow by gases is provided in an internal combustion engine for the purpose of separating entrained lubricating oil from blow by gases and thus significantly reducing the amount of oil going to the air intake system of the internal combustion engine. If oil is not effectively separated the performance of turbocharger & intercooler gets adversely affected furthermore the un-separated oil burns in the combustion chamber hampering engine performance and emission. Conventionally oil separation for the blow by gases is achieved using cyclonic separation principle, impact separation principle, expansion principle or multiple baffle plates to separate the entrained lubrication oil from blow by gases . The subject invention uses a novel combination of impact and expansion principle in conjunction with multiple baffle plates. OBJECTS OF INVENTION The main object of the invention is to provide a novel oil separator for internal combustion Engine, Another object of the present invention is to provide a novel oil separator for internal combustion engine which separate the entrained lubricating oil from blow by gases. Yet another object of the present invention is to provide a novel oil separator for an internal combustion engine with simple construction, compact size and light weight intended for ease of manufacturing. STATEMENT OF INVENTION A novel oil separator for Internal Combustion engine comprises; a divergent type housing mounted on bracket fitted on cylinder head for separating entrained lubricating oil from the blow by gases in an internal combustion engine, strainer plate mounted on the said divergent housing for increasing the velocity of blow by gases, at least two impact plates to reduce the velocity of blow by gases, baffle plate to change the flow direction of blow by gases, said impact plates and baffle plate are mounted on the said divergent housing, rear cover having holes for providing atmospheric pressure on one side of diaphragm which is provided between said rear cover and said housing , wherein said divergent type housing comprises; inlet of oil separator for blow by gas , outlet for oil separator for oil free blow by gases, oil outlet for separated lubricating oil, resilient means provided between said diaphragm and said outlet for oil separator for oil free blow by gases. A novel oil separator for Internal Combustion engine, in accordance with this invention, wherein said strainer plate comprises orifices through which high velocity blow by gases are allowed to hit on impact plates. A novel oil separator for Internal Combustion engine, in accordance with this invention, wherein said outlet for oil separator for oil free blow by gases comprises holes. A novel oil separator for Internal Combustion engine, in accordance with this invention, wherein said holes are inclined to change the suction direction away from the centre of oil outlet for separated lubricating oil. A novel oil separator for Internal Combustion engine, in accordance with this invention, wherein said divergent housing comprises sealing means to prevent the leakage of blow by gases to the atmosphere. A novel oil separator for Internal Combustion engine, in accordance with this invention, wherein said sealing means is a ring. A novel oil separator for Internal Combustion engine, in accordance with this invention, wherein said impact plate comprises drain hole to drain the separated oil. BRIEF DESCRIPTION OF INVENTION In accordance with the present invention, A novel oil separator for internal combustion engine comprises; divergent housing (06), inlet (01) of oil separator for blow by gas, outlet (09) for oil separator for oil free blow by gases, oil outlet (10) for separated oil. According to present invention, blow by gas is directed through said inlet (01) and impacts on strainer plate (02). The blow by gas then flows through small orifices of said plate (02) with high velocity and hits the impact plates (03, 04). The separated oil drains through holes (13) provided on said plate (02) and impact plate (04) to said oil outlet (10). The said impact plates (03,04) and baffle plate (05) also reduce the velocity of blow by gas due to change in flow direction of the same. The said impact plates (03, 04) also act as baffle plates. This helps further to separate entrained oil from the blow by gas. Finally the said divergent type housing (06) also helps to reduce velocity head of blow by gases along the flow direction thereby further separating oil from blow by gases. The separated oil drains to said oil outlet (10) through said oil holes (13) on said strainer plate (02) and impact plate (04). The divergent type housing (06) also helps to drain oil towards oil outlet (10). Thus oil free blow by gases pass through (09) towards air induction system. BRIEF DESCRIPTION OF DRAWINGS Figure- 01 shows the general arrangement of the oil separator described in the present invention in an internal combustion engine. Figure-0 2 shows an isometric view of the oil separator. Figure-0 3 & 04 shows detail cross-section view of the oil separator taken along the centre line. Figure-05 shows fluid flow directions of blow by gases, separated oil and oil free blow by gases using different arrows. 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, Now referring to the figure 1 to 5 , A novel oil separator for internal combustion engine comprises ; divergent housing (06), inlet (01) of oil separator for blow by gas, outlet (09) for oil separator for oil free blow by gases, oil outlet (10) for separated oil. According to present invention, blow by gas is directed through said inlet (01) and impacts on strainer plate (02). The blow by gas then flows through small orifices of said plate (02) with high velocity and hits the impact plates (03, 04). The separated oil drains through holes (13) provided on said plate (02) and impact plate (04) to said oil outlet (10). The said impact plates (03,04) and baffle plate (05) also reduce the velocity of blow by gas due to change in flow direction of the same. The said impact plates (03,04) also act as baffle plates. This helps further to separate entrained oil from the blow by gas. Finally the said divergent type housing (06) also helps to reduce velocity head of blow by gases along the flow direction thereby further separating oil from blow by gases. The separated oil drains to said oil outlet (10) through said oil holes (13) on said strainer plate (02) and impact plate (04). The divergent type housing (06) also helps to drain oil towards oil outlet (10). Thus oil free blow by gases pass through (09) towards air induction system. If air filter gets choked, the total suction pressure will act on oil separator unit. The diaphragm (07) provided between rear cover (08) and said housing (06) ,will close outlet pipe (09) under sudden intake depression. The said Rear cover with holes (08) assists the said diaphragm in closing the outlet pipe (09). The hole (12) on the outlet pipe (09) is made inclined to change the suction direction away from oil outlet (10) centre. The resilient means (11) provided between diaphragm and out let pipe for keeping blow by gases outlet (09) open during normal operating conditions. The O ring (14) acts as a sealing means to avoid the leakage of blow by gases to the atmosphere. Said strainer plate comprises orifices through which high velocity blow by gases are allowed to hit on impact plates. Said outlet for oil separator for oil free blow by gases comprises holes. Said holes are inclined to change the suction direction away from the centre of oil outlet for separated lubricating oil. Said divergent housing comprises sealing means. Said sealing means is a ring. Said second impact plate comprises drain hole to drain the separated oil. The general arrangement of the oil separator in internal combustion engine includes cylinder head cover, oil separator, and oil sump and air intake system. To remove the entrained lubricating oil from blow by gases, oil separator is mounted as close to cylinder head cover as possible. Blow by gases coming from the cylinder head are made to pass through the oil separator which separates oil from them and oil free blow by are again supplied to the air induction system of the engine. Oil which has been taken out from the blow by gases is again send back to the oil sump. 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. WE CLAIM 1. A novel oil separator for Internal Combustion engine comprises; a divergent type housing mounted on bracket fitted on cylinder head for separating entrained lubricating oil from the blow by gases in an internal combustion engine, strainer plate mounted on the said divergent housing for increasing the velocity of blow by gases, at least two impact plates to reduce the velocity of blow by gases, baffle plate to change the flow direction of blow by gases, said impact plates and baffle plate are mounted on the said divergent housing, rear cover having holes for providing atmospheric pressure on one side of diaphragm which is provided between said rear cover and said housing , wherein said divergent type housing comprises; inlet of oil separator for blow by gas , outlet for oil separator for oil free blow by gases, oil outlet for separated lubricating oil, resilient means provided between said diaphragm and said outlet for oil separator for oil free blow by gases . 2. A novel oil separator for Internal Combustion engine as claimed in claim 1, wherein said strainer plate comprises orifices through which high velocity blow by gases are allowed to hit on impact plates. 3. A novel oil separator for Internal Combustion engine as claimed in claim 1, wherein said outlet for oil separator for oil free blow by gases comprises holes. 4. A novel oil separator for Internal Combustion engine as claimed in claim 1 to 3 wherein said holes are inclined to change the suction direction away from the centre of oil outlet for separated lubricating oil. 5. A novel oil separator for Internal Combustion engine as claimed in claim 1 to 4 wherein said divergent housing comprises sealing means to prevent the leakage of blow by gases to the atmosphere. 6. A novel oil separator for Internal Combustion engine as claimed in claim 1 to 5 wherein said sealing means is a ring. 7. A novel oil separator for Internal Combustion engine as claimed in claim 1 to 6 wherein said impact plate comprises drain hole to drain the separated oil. 8. A vehicle comprising a novel oil separator of Internal Combustion engine as claimed in claim 1 to 7. 9. A novel oil separator for Internal Combustion engine as herein described substantially with reference to accompanying drawings. ABSTRACT A novel oil separator for an internal combustion engine This invention relates to an oil separator for an internal combustion engine. Oil separator which conventionally uses impact technology for the separation of oil particles from the blow by gases of the internal combustion engine. Due to the impact of high velocity blow by gases with an impact plate through small holes, kinetic energy of the blow by gases is reduced which separates oil from the blow by gases. In the present invention, three offset plates have been used as baffles. The two of them act as impact plates to fully utilize the space available. All three in total act as baffles to divert the fluid flow directions. In place of the constant diameter housing of the oil separator, a divergent type housing is used which helps to further reduce the velocity of the gases which facilitates oil separation . This in total improves the oil separation efficiency. Blow by gases are drawn from cylinder head cover into the inlet side of oil separator. The separated oil drains back into the oil sump below oil level. Substantially oil free gas is then introduced to the air induction system of the engine. Fig 4.

Documents:

202-mum-2008-abstract.doc

202-mum-2008-abstract.pdf

202-MUM-2008-CLAIMS(AMENDED)-(17-4-2012).pdf

202-MUM-2008-CLAIMS(AMENDED)-(30-1-2014).pdf

202-mum-2008-claims.doc

202-mum-2008-claims.pdf

202-mum-2008-correspondence(26-2-2008).pdf

202-mum-2008-correspondence-received.pdf

202-mum-2008-description (complete).pdf

202-MUM-2008-DRAWING(17-4-2012).pdf

202-MUM-2008-DRAWING(30-1-2014).pdf

202-mum-2008-drawings.pdf

202-MUM-2008-FORM 1(30-1-2014).pdf

202-mum-2008-form 18(26-2-2008).pdf

202-mum-2008-form 2(title page)-(29-1-2008).pdf

202-MUM-2008-FORM 3(30-1-2014).pdf

202-mum-2008-form 8(26-2-2008).pdf

202-mum-2008-form 9(26-2-2008).pdf

202-mum-2008-form-1.pdf

202-mum-2008-form-2.doc

202-mum-2008-form-2.pdf

202-mum-2008-form-26.pdf

202-mum-2008-form-3.pdf

202-MUM-2008-MARKED COPY(17-4-2012).pdf

202-MUM-2008-MARKED COPY(30-1-2014).pdf

202-MUM-2008-REPLY TO EXAMINATION REPORT(17-4-2012).pdf

202-MUM-2008-REPLY TO HEARING(30-1-2014).pdf

202-MUM-2008-SPECIFICATION(AMENDED)-(30-1-2014).pdf