FORM - 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2006
COMPLETE
Specification
(See Section 10 and Rule 13)
SYSTEM AND METHOD FOR LUBRICATING INTERNAL
COMBUSTION ENGINES
MAHINDRA TWO WHEELERS LTD.
an Indian Company
of Dl Block, Plot No. 18/2 (Part),
MIDC, Chinchwad, Pune - 411 019,
Maharashtra, India.
Inventors: 1. MEMON ZAKIRHUSEN KADARBHA1 2. DIGENDRA V1KRAM SINGH
THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES NATURE OF THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED

FIELD OF THE DISCLOSURE
The present disclosure relates to the field of internal combustion engines.
Particularly, the present disclosure relates to system and method for lubricating an internal combustion engines.
BACKGROUND
Lubrication is a method for reducing wear and tear of one or more surfaces moving relative to each another and in close proximity with each other, by a lubricant interposed between the surfaces. Lubricant carries or helps to carry the load between the moving surfaces. Apart from reducing the wear and tear, lubricants are used for transferring and reducing heat generated between the surfaces. Lubricants are widely used in almost every application having two surfaces having relative motion with respect to each other.
In internal combustion engines, lubricants are used for facilitating smooth sliding of the moving parts of the internal combustion engines. Various types of lubricating systems, such as, gravity lubrication, pressure lubrication, mixing of oil into the fuel, are used for providing lubrication to various parts of the internal combustion engines.
In a conventional engine lubricating system, one end portion of a crankshaft of an internal combustion engine is positioned directly into a clutch cover through which oil from an oil pump flows through a crankshaft via the clutch cover and crankcase oil passages.

Conventional engine lubricating system is plagued with several drawbacks. One of the drawbacks of conventional lubrication system is leakage of oil between the clutch cover and a crankshaft. Further, the conventional lubrication systems are ineffective in providing lubrication to various parts of an internal combustion engine.
Accordingly, there was felt a need for a lubrication system for overcoming the drawbacks of conventional lubrication systems.
OBJECTS
Some of the objects of the system of the present disclosure, which at least one embodiment herein satisfies, are as follows:
An object of the present disclosure is to provide a lubrication system which enables in preventing leakage of lubrication oil.
Another object of the present disclosure is to provide a lubrication system which provides effective lubrication of various parts of the internal combustion engine.
Still another object of the present disclosure is to provide a lubrication system which enables in efficient lubrication of the various parts of the internal combustion engine.
Yet another object of the present disclosure is to provide a lubrication system which enables in transmitting lubricating oil at a predetermined pressure for lubrication.

Other objects and advantages of the present disclosure will be more apparent from the following description when read in conjunction with the accompanying figures, which are not intended to limit the scope of the present disclosure.
SUMMARY
In accordance with the present disclosure there is provided a lubricating system for an internal combustion engine having a crankshaft cooperating with a crankpin coupled to a connecting rod, the crankshaft being provided with lubrication holes, the lubricating system adapted to receive lubricating oil from an oil pump, the lubricating system comprising:
> an oil rotor filter mounted on the crankshaft;
> a filter cover located between the oil rotor filter and a clutch cover, the clutch cover is adapted to cooperate with the rotor oil filter cover through an oil seal press fitted therebetween;
> an oil pocket defined between the filter cover and the clutch cover, the oil pocket adapted to be in fluid communication with an oil passage defined within the clutch cover, the oil pocket being adapted to receive lubricating oil from the oil pump; and
> a splined bush cooperating with the crankshaft and the rotor oil filter cover, the splined bush adapted to pressurize and transfer lubricating oil from the oil pocket to the rotor oil filter.
In accordance with the present invention there is provided a method for lubricating an internal combustion engine having a crankshaft cooperating with a crankpin coupled to a connecting rod, the crankshaft being provided

with lubrication holes adapted to receive lubricating oil from an oil pump, the method comprises the steps of:
pumping lubricating oil through an oil passage defined in a clutch cover;
accumulating lubricating oil in an oil pocket defined between the clutch cover and a filter cover;
providing a splined bush partially disposed and projecting into the oil pocket; and
rotating the splined bush by means of the crankshaft to cause lubricating oil to flow under pressure from the oil pocket into the lubricating holes provided in the crankshaft through the splined bush and the oil rotor filter.
Typically, the lubricating system is adapted to lubricate a vehicular engine.
Typically, the lubricating system is adapted to lubricate an engine provided on a two wheeler vehicle.
Typically, the lubricating system is adapted to lubricate an engine provided on a three wheeler vehicle.
Typically, the lubricating system is adapted to provide lubrication in an internal combustion engine having engine displacement volume in the range of50ccto300cc.

BRIEF DESCRIPTION OF ACCOMPANYING DRAWINGS
The lubricating system for an internal combustion engine of the present disclosure will now be described with the help of accompanying drawing, in which:
Figure 1 illustrates a cross-sectional view of the lubrication system for an internal combustion engine, in accordance with one embodiment of the present disclosure.
DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWING
A preferred embodiment of the lubricating system for an internal combustion engine of the present disclosure will now be described in detail with reference to the accompanying drawing. The preferred embodiment does not limit the scope and ambit of the disclosure. The description provided is purely by way of example and illustration.
The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.

The following description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.
Referring to the accompanied drawing, a lubricating system for an internal combustion engine, in accordance with this disclosure is generally referenced by the numeral 100 and is particularly shown in Figure 1. The lubricating system 100 enables lubricating a vehicular internal combustion engine, used in a two wheeler vehicle and a three wheeler vehicle, having engine displacement volume in the range of 50 cc to 300 cc.
Lubrication system 100 includes rotor oil filter 106 mounted on the end of crankshaft 102 which is opposite the end of crankshaft 102 cooperating with a big end of a connecting rod (not shown in figure) through a crankpin (not shown in figure). Crankshaft 102 is provided with acting as an oil path, indicated by arrows in lubrication holes 121, for allowing passage of lubrication oil in order to lubricate various parts of the internal combustion engine. Splined bush 108 functionally cooperates with crankshaft 102

through splined joint while filter cover 114 is fitted on splined bush 108. Clutch cover 104 cooperates with filter cover 114 through oil seal 112 and circlip 120. Oil seal 112 is press fitted in clutch cover 104. Oil pocket 110 is defined between filter cover 114 and clutch cover 104. Oil pocket 110 is in fluid communication with oil passage 116, defined within clutch cover 104, for facilitating entry of lubricating oil from an oil pump (not shown in figure) into oil pocket 110 of lubricating system 100.
The lubricating oil from the oil pump (not shown in figure) is allowed to be pumped through oil passage 116 and is accumulated in oil pocket 110. Splined bush 108 partially disposed and projecting into oil pocket 110 and is rotated by means of crankshaft 102 to cause lubricating oil to flow under pressure from oil pocket 110 into oil rotor filter 106. The pressurized lubricating oil flowing into rotor oil filter 106 from oil pocket 110 is filtered in rotor oil filter 106 by being splashed centrifugally and positive filtration. The filtered lubricating oil from rotor oil filter 106 is allowed to flow through lubrication holes 121 provided oh crankshaft 102 for lubricating the end of the crankshaft 102 cooperating with the big end of the connecting rod (not shown in figure) and the crank pin (not shown in figure).
TECHNICAL ADVANCEMENTS
The technical advancements offered by the present disclosure include the realization of:
• preventing leakage of lubrication oil;
• providing effective lubrication;
• providing efficient and fast lubrication;
• providing lubrication at a predetermined pressure;

• positive filtration and positive lubrication; and
• reducing the time required for lubrication.
Throughout this specification the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.
The use of the expression "at least" or "at least one" suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the disclosure to achieve one or more of the desired objects or results.
The numerical values given of various physical parameters, dimensions and quantities are only approximate values and it is envisaged that the values higher or lower than the numerical value assigned to the physical parameters, dimensions and quantities fall within the scope of the disclosure unless there is a statement in the specification to the contrary.
Wherever a range of values is specified, a value up to 10% below and above the lowest and highest numerical value respectively, of the specified range, is included in the scope of the disclosure.
* The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such

adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.

We claim:
1. A lubricating system for an internal combustion engine having a
crankshaft cooperating with a crankpin coupled to a connecting rod, the
crankshaft being provided with lubrication holes, said lubricating
system adapted to receive lubricating oil from an oil pump, said
lubricating system comprising:
an oil rotor filter mounted on the crankshaft;
a filter cover located between said oil rotor filter and a clutch cover, said clutch cover adapted to cooperate with said rotor oil filter cover through an oil seal press fitted therebetween;
an oil pocket defined between said filter cover and said clutch cover, said oil pocket adapted to be in fluid communication with an oil passage defined within said clutch cover, said oil pocket adapted to receive lubricating oil from the oil pump; and
a splined bush cooperating with said crankshaft and said rotor oil filter cover, said splined bush adapted to pressurize and transfer lubricating oil from said oil pocket to the lubrication holes through said rotor oil filter.
2. A method for lubricating an internal combustion engine having a
crankshaft cooperating with a crankpin coupled to a connecting rod, the
crankshaft being provided with lubrication holes adapted to receive
lubricating oil from an oil pump, said method comprises the steps of:

pumping lubricating oil through an oil passage defined in a clutch cover;
accumulating lubricating oil in an oil pocket defined between said clutch cover and a filter cover;
providing a splined bush partially disposed and projecting into said oil pocket; and
rotating said splined bush by means of the crankshaft to cause lubricating oil to flow under pressure from said oil pocket into the lubricating holes provided in the crankshaft through said splined bush and said oil rotor filter.
3. The lubricating system as claimed in claim 1, wherein said lubricating system is adapted to lubricate a vehicular engine.
4. The lubricating system as claimed in claim 1, wherein said lubricating system is adapted to lubricate an engine provided on a two wheeler vehicle.
5. The lubricating system as claimed in claim 1, wherein said lubricating system is adapted to lubricate an engine provided on a three wheeler vehicle.

6. The lubricating system and method as claimed in claim 1 and claim 2, wherein said lubricating system is adapted to provide lubrication in an internal combustion engine having engine displacement volume in the range of 50 cc to 300 cc.