FORM 2
THE PATENT ACT 1970 [39 OF 1970]
&
The Patents Rules, 2003
COMPLETE SPECIFICATION
[See section 10; rule 13]
“LUBRICANT OIL AND SUMP HEATING SYSTEM FOR INTERNAL
COMBUSTION ENGINE”
Name of the Applicant: Tata Motors Limited; Bombay House, 24 Homi Mody
Street, Hutatma Chowk, Mumbai 400 001 Maharashtra, India.
Nationality: Indian
The following specification particularly describes the invention and the manner in which it is to be performed

FIELD OF INVENTION
This present invention relates to an internal combustion engine of an automobile or stationary engine application and more particularly it relates to lubricant oil & sump heating system for an internal combustion engine by treated exhaust gases for automobiles operating in nominal to subzero or colder ambient condition for quick and improved conditioned lubrication of an engine under all operating temperature condition.
BACKGROUND OF THE INVENTION
Generally the lubricating oil are used in the engine for reducing the friction in rotating and reciprocating parts or components, such as crack shaft, cam shaft, piston and connecting rods etc. The friction between the said components is influenced by the temperature of said components and lubricating oil.
The frictional losses are almost double in cold operating conditions when compared with the conditioned operating temperature conditions. During Cold engine operation, engine speed and load on the engine directly influences the friction in said components. The above mentioned reasons are cause for increased fuel consumption and higher CO2 emission after a cold start and the time duration till the engine has reached desired operating state of operation.
During cold start the mechanical efficiency of the engine drops and thus the influence of friction on fuel consumption continue to rise.
Today the requirement of automotives in the areas of military equipments, commercial along with in the passenger segment is to operate on lowest possible friction, reduced fuel consumption, lower emission, and higher engine life solutions even at sub zero operating conditions to achieve zero emission including zero CO2 emission for environment protection and restoration.
Under colder operating conditions the conventional system used in IC engines is not capable in reducing engine losses, exhaust emission and fuel consumption at the same time and the lubricating oil obtains its optimum operating temperature conditions only after the engine has run for a considerable period after cold starting. As a current practice

the conventional system uses various different methods such as increased fuel injection, advanced ignition timing etc in order to bring the coolant temperature to optimum operating temperature level. These practices produce higher CO2 emissions along with higher hydrocarbon emission during cold engine operations.
Various anti freeze additives are required for lubricating oils operating in colder operating conditions in order to reduce friction , wear, increased viscosity, improved viscosity index, resistance to corrosion and oxidation, aging or contamination, etc.
While operating in the emission drive cycle for meeting the regulatory requirement, the engine lubricating oil should be conditioned to its desired operating conditions for reducing the friction thereby reducing emission. The conventional system does not address to the conditioning of the engine oil temperature, thus the friction level of the system is very high and the system consumes more fuel and emits higher exhaust emission during the drive cycle.
The present invention is developed to address the above mentioned disadvantages of the conventional system which caters to reduce friction and wear and tear of engine components which further reduces CO2 value of the engine operating both under nominal and sub zero operating conditions.
OBJECTS OF INVENTION
The main object of the present invention is to provide a lubricant oil and sump heating system for internal combustion engine.
Another object of the present invention is to provide a lubricant oil and sump heating system for internal combustion engine which conditions the oil for lubrication to the engine under both nominal and subzero operating conditions with improved oil pump ability and oil viscosity.
Another object of the present invention is to provide a lubricant oil and sump heating system for internal combustion engine which reduces engine warm up duration during cold engine starting.

Another object of the present invention is to provide a lubricant oil and sump heating system for internal combustion engine which reduces friction , wear and tear of engine components thereby reducing the CO2 emissions of the engine.
Another object of the present invention is to provide a lubricant oil and sump heating system for internal combustion engine which improves engine fuel phasing and reduces fuel injection duration during warm up phase to reduce fuel consumption.
Another object of the present invention is to provide a lubricant oil and sump heating system for internal combustion engine which reduces fuel injection duration during engine restarting during cold operating conditions and reduce fuel consumption.
Another object of the present invention is to provide a lubricant oil and sump heating system for internal combustion engine which stabilizes and reduces engine idling RPM during cold / sub zero operating conditions.
Another object of the present invention is to provide a lubricant oil and sump heating system for internal combustion engine which achieves minimal dependency on expensive synthetic based oils as lubricants which further arrests environmental hazards during disposal.
STATEMENT OF INVENTION
In accordance with the present invention, a lubricant oil and sump heating system for an internal combustion engine comprises; a oil sump 03 provided on engine block 01, an exhaust manifold 04 connected to engine head 02; Catalytic convertor 05 connected to said exhaust manifold 04 for treating the exhaust gas; a front pipe 06 connected with said catalytic convertor 05; a source tube member 07 connected with said front pipe 06; a heating tube member 08 disposed in said oil sump 03; a discharge tube 09; a first control valves 10 for controlling inlet gas; a second control valves 11 for controlling the discharge of exhaust gas; plurality of temperature seals 12,13,14,15,16 are provided for connecting said front pipe, source tube member, heating tube, discharge tube with each other and preventing leakage of exhaust gas; said heating tube 09 is submerged in

lubricant oil and is in contact with said oil sump 03 and lubricant oil contained therein, one end of said heating tube is connected to said source tube member 07 and other end is connected to the discharge tube member 08.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig 1 is a front view of the system according to the current invention. Fig 2 is a side view from left hand side according to the current invention. Fig 3 is a side view from right hand side according to the current invention. Fig 4 is a top view of the system according to the current invention.
DETAILED DESCRIPTION OF INVENTION
In accordance with the present invention, a lubricant oil and sump heating system for an internal combustion engine comprises; a oil sump 03 provided on engine block 01, an exhaust manifold 04 connected to engine head 02; Catalytic convertor 05 connected to said exhaust manifold 04 for treating the exhaust gas; a front pipe 06 connected with said catalytic convertor 05; a source tube member 07 connected with said front pipe 06; a heating tube member 08 disposed in said oil sump 03; a discharge tube 09; a first control valves 10 for controlling inlet gas; a second control valves 11 for controlling the discharge of exhaust gas; plurality of temperature seals 12,13,14,15,16 are provided for connecting said front pipe, source tube member, heating tube, discharge tube with each other and preventing leakage of exhaust gas; said heating tube 09 is submerged in lubricant oil and is in contact with said oil sump 03 and lubricant oil contained therein, one end of said heating tube is connected to said source tube member 07 and other end is connected to the discharge tube member 08.
The one end of said exhaust manifold 04 is connected to engine head 02 and the other end of the said exhaust manifold 04 is connected to the said catalytic convertor 05. The said catalytic convertor 05 is provided between the said exhaust manifold 04 and said front pipe 06. The said source tube member 07 is connected to the front pipe 06 at one end and the other end of the said source tube member is connected to the said heating tube member 09. The said source tube member 07 is located between the said front pipe 06 and the said heating tube member 09.

The heating tube 09 is located inside the oil sump 03 and is rigidly held in its desired location. The said heating tube 09 is in direct contact with the oil sump 03 along with the lubricating oil contained in it. One end of the said heating tube is connected to the source tube member 07 and the other end of the said heating tube is connected to the discharge tube member 08.
The said heating tube is located between the said source tube member 07 and the said discharge tube member 08. The said discharge tube member 08 is connected at one end with the said heating tube member 09 and the other end of the said discharge tube is connected to the said front pipe 06.
The said front pipe is connected at the downstream of the said Catalytic convertor 05 through which exhaust gasses come out of the said Catalytic convertor 05 and enters into the said front pipe 04. The exhaust gasses are transported from the said engine head 02 to the Catalytic convertor 05 via the exhaust manifold 04.
The oil sump is mounted to the bottom of the engine block 01 where all lubricating oil is stored for circulation during engine operation. The lower exit of the Catalytic convertor is connected to the top side of the front pipe and the other end of the front pipe is connected the silencer pipe.
Plurality of temperature seals 12, 13,14,15,16 are provided preventing leakage of exhaust gas. at least one high temp seals 12 is provided between the lower end flange of the Catalytic convertor and the top end inlet flange of the front pipe. At least two temperature seals 13,14 and 15,16 are provided on the either ends on both the said source tube member and discharge tube member in order to prevent leakage of exhaust gas between their connecting joints with the front pipe at one end and the heating tube on the other.
During cold starting the engine, the said rotating and reciprocating components along with the lubricating oil is cold. The exhaust gases gets transported for the said engine through the head then exhaust manifold and the Catalytic convertor into the said front pipe.

Said two control valve 10,11 is controlled with the help of engine ECU. The engine ECU opens the entry control valve 10 fully which allows the hot exhaust gasses to enter into the oil sump through the said source and heating tube arrangement with the front pipe. The ECU also opens the discharge valve 11 partially for the initial duration and at the same time said ECU fully opens the entry control valve 10.
The said source tube member and discharge tube members are made of an insulating material and they do not dissipate the exhaust gas heat to the atmosphere nor do The said source tube member and discharge tube members allow heat transfer between the said front pipe and the said heating tube. The said heating tube member on the other hand is made of a highly conductive material.
The said heating tube member is submersed in the cold lubricating oil inside the oil sump and is also in physical contact with the oil sump surface 03. As the hot exhaust gasses pass through the said heating tube the temperature of said heating tube rises which in turn rises the temperature of the lubricant oil and oil sump 03.
The increase in temperature of lubricant oil improves the viscosity and flow of lubricating oil in the oil sump. The said heating tube member 09 accelerates the heating of said sump and oil and reduces the warm up duration of the said engine in normal as well as during sub zero operating conditions. This provides stabilized engine functioning during idling and reduces engine idling RPM during cold / sub zero operating conditions as the engine can run at lower idling RPMs even in colder conditions without quitting as a result of reduced frictional forces thereby prevents engine deterioration by improved lubrication, maximizes engine performance, improves drivability and reduces emission.
As the oil temperature reaches the desired operating temperature, the engine ECU opens the discharge valve fully to smoothen the out flow of exhaust gases from the heating tube. The heated exhaust gasses passes through the oil sump.
Said heated gas is discharged from the discharge tube through discharge valve. The said gas passes to the lower end of the front pipe to enter the silencer pipe.

Once the lubricating oil has reached its operating temperature the ECU senses the oil temperature through an oil temperature sensor and closes both the discharge and entry control valve. These valves can be connected either directly on indirectly by an electric motor to facilitate desired valve actuation. The oil temperature sensor can be located in the oil sump or the oil gallery depending engine lubrication circuit feasibility.
The present system can also be mechanically actuated with the help of simple linkages for engines operating without ECU. A thermostat is located in the oil sump at suitable location in order to determine the average oil temperature.
The said thermostat is having a bellows containing the expanding element such as wax.
The bellow is interfaced with a simple lever or wire arrangement which is in turn interfaced with spring loaded first control valve 10 and second control valve 11 provided source tube member and discharge tube respectively.
As the oil temperature achieves the desired operating temperature, the heated oil expands the bellows of the thermostat which in turn operates said simple lever or wire arrangement in order to close the source 10 and discharge control valves 11 at the same time thereby chanalising all the post catalytic exhaust gasses away towards the exit of the front pipe to further enter the silencer pipe.
Similarly when the oil temp is cold or below its desired conditioned operating temperature the said bellows contracts and enables the said source and discharge control valves to be in open condition in order to facilitate the flow of hot post catalytic exhaust gasses through the said heating tube member in the said oil sump for heating oil and the oil sump there by providing efficient lubrication and reduced engine friction even during extremely cold operating conditions.
This system can also to be used with turbocharged engines where the exhaust gasses are transported through the exhaust manifold into the turbocharger. The exhaust manifold is either integrated with the turbo charger or is separate connected to each other and

channelizing the exhaust gas passage. These gasses are further directed into the catalytic convertor for catalytic treatment. These treated hot exhaust gasses are then further directed into the oil sump in order to heat the oil sump and the oil contained therein. This makes it a very robust system where all the possible energy content in the exhaust gasses are utilized before it is released into the atmosphere and provides improved engine lubrication, maximizes engine performance, improves drivability and reduces fuel consumption.
This system is also used where the catalytic convertor and the exhaust manifold is integrated as one unit. Thus there is no joint between the two entities and the exhaust gasses are transported from the exhaust port of the cylinder head into this integrated manifold and catalytic convertor unit and then directed into the oil sump with the help of the said front pipe, said source tube and the said discharge tube to enhance engine performance at all operating conditions.
In cases where the engines are relatively bigger for heavy duty application as used in defence forces, earth movers etc. plurality of parallel heating tubes is used to in the oil sump in order to provide efficient oil conditioning in a short duration after starting; said heavy duty engines operate under extreme operating conditions and thus require multiple heating tube to provide quick and efficient engine lubrication in order to reduce wear and tear to increase the life of the engine and its components.
The said heating tube member is having finned portion in order to increase the heating contact surface area in the oil sump.
The said fins are either an integral part of the heating tube or be as a separate unit connected to the heating tube member. These finned heating tube members are provided for a higher rate of heat transfer from the heating tube member to the lubricating oil for engines operating in extreme cold or sub zero ambient conditions in order to provide efficient engine lubrication and increased life of the engine components even under extreme cold operating conditions.

The said heating tube member used in this lubricant oil and sump heating system can be either made as a single unit or can be an integration of multiple parts put together to form the said heating tube member in order to facilitate efficient periodic serviceability of 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 lubricant oil and sump heating system for an internal combustion engine comprises; a oil sump 03 provided on engine block 01, an exhaust manifold 04 connected to engine head 02; Catalytic convertor 05 connected to said exhaust manifold 04 for treating the exhaust gas; a front pipe 06 connected with said catalytic convertor 05; a source tube member 07 connected with said front pipe 06; a heating tube member 09 disposed in said oil sump 03; a discharge tube 08; a first control valves 10 for controlling inlet gas; a second control valves 11 for controlling the discharge of exhaust gas; plurality of temperature seals 12,13,14,15,16 are provided for connecting said front pipe, source tube member, heating tube, discharge tube with each other and preventing leakage of exhaust gas; said heating tube 09 is submerged in lubricant oil and is in contact with said oil sump 03 and lubricant oil contained therein.
2. The lubricant oil and sump heating system for an internal combustion engine as claimed in claim 1, wherein said heating tube member 09 is interfaced with said source tube member 07 at one end and said discharge tube member 08 at other end.
3. The lubricant oil and sump heating system for an internal combustion engine as claimed in claim 1, wherein said source tube member 07 is interfaced with said front pipe 06 at one end and inlet of said heating tube member 09 at other end.
4. The lubricant oil and sump heating system for an internal combustion engine as claimed in claim 1, wherein said discharge tube member 08 is interfaced with outlet of said heating tube member 09 and said front pipe 06.
5. The lubricant oil and sump heating system for an internal combustion engine as claimed in claim 1, wherein said front pipe 06 is connected at the downstream of the said Catalytic convertor 05 through which treated exhaust gas passes and enters into said front pipe 06.
6. The lubricant oil and sump heating system for an internal combustion engine as claimed in claim 1, wherein top and bottom end of said front pipe is connected to exit of said Catalytic convertor and to the silencer pipe respectively.

7. The lubricant oil and sump heating system for an internal combustion engine as claimed in claim 1, wherein said first and second control valves are controlled with the help of engine ECU.
8. The lubricant oil and sump heating system for an internal combustion engine as claimed in claim 1, wherein said exhaust manifold is integrated with or separate from a turbo charger for turbocharged engine.
9. The lubricant oil and sump heating system for an internal combustion engine as claimed in claim 1, wherein said oil sump comprises plurality of parallel heating tubes for bigger engine size or heavy duty application.
10. The lubricant oil and sump heating system for an internal combustion engine as claimed in claim 1, wherein said heating tube member is having plurality of fins which is integral with or separately mounted to said heating tube member.
11. The lubricant oil and sump heating system for an internal combustion engine as claimed in claim 1, wherein said heating tube member is a single unit or made up of multiple parts to form said heating tube member in order to facilitate efficient periodic serviceability of the oil sump.
12. The lubricant oil and sump heating system for an internal combustion engine as claimed in claim 1, wherein said source tube member and discharge tube members are made of an insulating material.
13. The lubricant oil and sump heating system for an internal combustion engine as claimed in claim 1, wherein said heating tube member is made of a conductive material.
14. The lubricant oil and sump heating system for an internal combustion engine is herein described with reference to accompanying drawings.