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 Mounting Arrangement For Oil Filter And Oil Cooler For IC Engines
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. Milind D. Peshave,
Mr. Niraj R. Dharkar & Mr. D Ajith
All are 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
The present invention relates to the lubrication system for an internal combustion engine, and more particularly to an integrated mounting arrangement for an oil cooler and an oil filter of the internal combustion engine in a preferred location on the cylinder block, and providing a passage for the lubricating oil to flow from cylinder block to the oil filter and the oil cooler.
BACKGROUND OF THE INVENTION
The automotive internal combustion engines have high heat rejection rates, thus, it is necessary to cool the engine lubricating oil. This is sometimes accomplished by passing the oil through an air-to-oil heat exchanger which is mounted in the air stream flowing past the vehicle. Another technique is mounting a heat exchanger within the radiator of the vehicle so that coolant flowing through the radiator chills the oil passing through the heat exchanger. This is disadvantageous because such hoses increase the expense of the system as well as causing problems because of the fact that their mere presence requires additional space and packaging considerations within the engine compartment of the vehicle.
The modern day engine compartments are so cramped that the oil filter are usually mount in an inaccessible area. The limited space also force to use smaller capacity filters which ultimately lead to frequent replaced of the filters. Conventionally the filters are integrally mounted to cylinder block with or without using an adaptor wherein the filter is positioned in line with mounting axis. Most often this makes the location of the oil filter inaccessible and the replacing oil filters becomes cumbersome.
The US patent no. 4492632 proposes mounting the oil filters away from cylinder block to avoid limitation of space and accessibility. The patent describes about an

assembly for converting integrally mounted spin off or cartridge type oil filter to larger capacity externally mounted replaceable cartridge type oil filter. The assembly comprises a hollow cast adaptor housing having a centrally displaced threaded spindle and a radialy removed circular sealing member for permitting the sealed mounting of the cast adaptor member to an engine's existing spin off filter or cartridge filter receiving casting.
A pair of inlet and outlet ports and hoses couple oil from the engine to a large peripherally mounted, replaceable insert type cartridge filter receiving assembly. However, the arrangement has the disadvantages of usage of more number of components, a separate mounting arrangement for the oil filter and additional hoses for connecting to the filter.
Further the hoses are connected to the block through an adaptor. Usage of adaptor, separate hoses and mounting arrangement make the system complex in terms of number of parts used and compactness of the arrangement. This type of system also suffers from a major drawback as the hoses are subject to failure, with often catastrophic results if the driver of the vehicle does not stop the engine almost immediately.
Moreover, the hoses increase the expense of the system as well as causing problems because of the fact that their mere presence requires additional space and packaging considerations within the engine compartment of the vehicle.
With respect to the conventional mounting arrangement of oil filter and oil cooler, it is necessary to provide an improved mounting arrangement for the oil cooler and oil filter for an IC engine free from the above-mentioned disadvantages and the short comings involved in the conventional arrangements.

Therefore, it is necessary and desirable and advantages to have a system which overcomes the above difficulties with simple in construction, less number of parts, easily to fix and remove the filter and orienting the filter in a desired location to have easy accessibility and space.
OBJECTS OF THE INVENTION
The main object of the present invention is to provide a mounting arrangement for oil filter and oil cooler, which is simple in construction, having less number of parts, and easily to fix and remove the filter.
Another object of the present invention is to provide a rigid structure for the mounting of the combination of oil cooler and oil filter and connection of this combination onto the cylinder block.
Another object of the present invention is to provide the direction to oil filter in suitable location as per the vehicle layout so that required accessibility and space is available.
Further object of this invention is to provide a passage for the lubricating oil to flow from the main gallery in the cylinder block into the oil cooler & filter and for the filtered with required temp drop in oil to flow back into the cylinder block.
Still further object of this invention is to provide an improved mounting arrangement having positional reference for the accurate location of the oil cooler on the engine.
Yet another object of this invention is to provide an integral location for the oil pressure switch from which the oil pressure signal is taken for vehicle dashboard indication.

Yet another object of this invention is to provide an improved mounting arrangement having flexibility in the design, manufacture and operation of internal combustion engines.
SUMMARY OF THE INVENTION
The present invention which achieves the objectives relates to an improved mounting arrangement for oil filter and oil cooler for an IC engine. The arrangement for an engine includes a cylinder block provided with internal oil lines to lubricating the internal rotating parts. A machined surface for mounting an oil filter is provided on the side wall of the cylinder block. Oil inlet and oil return lines in the main oil gallery are located on the machined surface to carry the oil from the cylinder block and back to the cylinder block.
An adaptor made of Aluminum High Pressure Die Cast is assembled with cylinder block. The adaptor has two angled faces respectively for attaching to the cylinder block and mounting an oil filter. The adaptor is assembled with the side wall of the cylinder block, such that the inlet passage and outlet passage on the attaching face of the adaptor mate with the inlet and outlet passages on the machined surface of the cylinder block.
The adaptor includes two concentric circular mounting flanges on which the combination of oil cooler and oil filter are mounted. The inner circular mounting flange has a threaded internal diameter on which a special threaded connecter made from steel is mounted. The other end of this adaptor is connected to the internal diameter of the oil filter. The oil cooler is mounted with its internal diameter located on the outer diameter of this threaded cylindrical connector.
A connector having through hole connecting the adaptor and the oil filter, such that the connector channellize the oil communication between the cylinder block and

the oil filter through the adaptor, and the oil filter is prevented from having direct contact with the side wall of the cylinder block. The oil cooler is secured between the adaptor and the oil filter, such that the oil cooler surrounds the connector and provide a circumferential passage for the oil flow to the oil filter and simultaneously cool the passing oil. The adaptor aligns the oil filter parallel to the longitudinal axis of the engine.
This improved mounting arrangement integrates multifunction in the single module and ensures the compactness of an engine which is a crucial requirement of engine for automotive application. The adaptor facilitate in mounting of the combination of oil cooler and oil filter and connecting this combination to the cylinder block and allowing for the passage of lubricating oil from the main oil gallery in the cylinder block into the oil filter and return of the filtered oil back into the main oil gallery in the cylinder block after cooling of the oil.
BRIEF DESCRIPTION OF DRAWINGS
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.
Fig. 1 shows an internal combustion engine having the improved mounting arrangement for oil cooler and oil filter, in accordance to the exemplary embodiment of the present invention.
Fig. 2 illustrates an isometric view of the adapter for mounting the oil cooler and the oil filter, in accordance o the present invention.
Fig. 3 shoes a front cross sectional view of the adaptor to mount the oil cooler and oil filter, in accordance to the present invention.

Fig. 4 shows the adaptor having a bore provided at the outlet passage for inserting a pressure switch, in accordance to the present invention.
Fig. 5 shows the filter mounting face view of the adaptor having a protrusion part to locate the oil cooler in a specific angular position in accordance to the present invention.
DETAILED DESCRIPTION
The present invention relates to the integrated mounting arrangement for an oil cooler and oil filter of the internal combustion engine on the cylinder block, and providing a passage for the lubricating oil to flow from cylinder block to the oil filter and the oil cooler. Fig. 1 shows an internal combustion engine having the improved mounting arrangement for oil cooler and oil filter, in accordance to the exemplary embodiment of the present invention. Referring to figure 1, the engine (1) with a cylinder block (2) is provided with internal oil lines to lubricating the internal rotating parts. A machined surface (2') for mounting an oil filter (3) is provided on the side wall of the cylinder block (1). Oil inlet and oil return lines in the main oil gallery (not shown) are located on the machined surface to carry the oil from the cylinder block and back to the cylinder block (2).
An adaptor (4) made of Aluminum High Pressure Die Cast is assembled with cylinder block (2). The adaptor (4) has two angled faces respectively for attaching to the cylinder block (2) and mounting an oil filter (3). The adaptor (4) is mounted on the machined surface with inlet and outlet passage mating with the inlet and outlet on the machined surface of the cylinder block (4) which is in main oil gallery line. The adaptor (4) is assembled with the side wall of the cylinder block, such that the inlet passage and outlet passage on the attaching face of the adaptor (4) mate with the inlet and outlet passages on the machined surface of the cylinder block (2).

An oil filter (3) is mounted on the adaptor (4) by a threaded connector (6). The connector (6) is a tube structure having threads at both ends to connect the oil filter (3) at its one end and the filter adaptor (4) at the other end. The threaded connector (6) is formed with a through hole, so that the connector (6) channelizes the oil communication between the cylinder block (2) and the oil filter (3) through the adaptor (4). The connector (6) facilitates the flow of return oil from the oil filter (3) to the cylinder block (2) through the adaptor (4).
An oil cooler (5) is located between the adaptor (4) and oil filter (3) which surrounds the connector (6) and creates a circumferential passage for the oil flow to the filter (3) and simultaneously cools the passing oil. The adaptor (4) aligns the oil filter (3) parallel to the longitudinal axis of the engine (1). The adaptor (4) is designed in such way that it avoids projecting the oil filter (3) directly from the side wall of the cylinder block (2). The adaptor (5) aligns the filter (3) parallel to the longitudinal axis of the engine (1) for improving the space availability and accessibility.
Fig. 2 and 3 illustrates views of the adapter for mounting the oil cooler and the oil filter, in accordance o the present invention. The adaptor (4) is made of block having two different faces, attaching face (8) and mounting face (7). The attaching face (8) enables for assembling the oil filter (3) and oil cooler (5) with the adaptor (4) and the mounting face (7) enables for mounting the adapter (4) with the cylinder block (2) of the engine (1).
Interior passages are formed in the adapter (4) for inlet and outlet oil flow which connect the two faces (7, 8). The attaching face (8) to the cylinder block (2) is provided with machined surface which is in direct contact with the cylinder block (2) and the adaptor (4) is fastened onto the cylinder block (2). The oil filter (3) mounting face (7) is at an angle with the face (8). The oil cooler (5) is positioned on the outer flange (9) of the adaptor (5).

In a preferred embodiment the angle of adapter faces (7, 8) are kept at 90 degree. The faces (7, 8) can be positioned at different angle between > 0° and < 180° according to the space and accessibility required for the oil filter (3). The adaptor (4) can be like an extended flange wherein the faces (7, 8) are away from each other and positioned at an angle. By this arrangement the oil filter (3) can be positioned at any angle and away from the cylinder block (2).
An inlet passage (11) is originating from the attaching face (8) and extending up to the oil filter mounting face (7). The inlet passage is open to the annular space (13) between the outer and inner (9, 10) flanges. An out let passage (12) is originating from the inner flange portion (10) of the mounting face (7) and extending to the attaching face (8). The inlet passage and the outlet passage in the adaptor (4) are facilitating to fluidly communicating with the oil filter (3) and cylinder block (2).
Provisions for fastening the adaptor (4) to the cylinder block (2) are provided on the adaptor block by means of flange holes and screws. Cavities are provided on the adaptor block to reduce the material and thereby the weight of the component. The adaptor (4) can be preferably made of aluminum or any other suitable material. The inlet passage (11) is opened to the annular space between outer flange (9) and inner flange (10) on the oil filter mounting face (7).
The outlet passage (12) is extending from the inner circular flange (10). The inner portion of the circular flange (10') is having threads for attaching the threaded connector (6) into it. This will help to attach the oil filter (3) to the adaptor (4) and also carrying the filtered oil from the oil filter (3) to the out let passage in the adaptor (4) thereby sending back the filtered oil to the cylinder block main oil gallery. The improved mounting arrangement according to the present invention permits great deal of flexibility in mounting the oil filter and the oil cooler to provide for space limitations and desirability.

Fig. 4 shows the adaptor having a bore provided at the outlet passage for inserting a pressure switch, in accordance to the present invention. A bore (14) is provided on the adaptor block (4) which is open to the out let passage (12) at one end and opens to outside the adaptor block at other end for inserting a pressure switch. The pressure switch in the bore (14) will be in communication with the oil flow through the out let passage to measure the required pressure. This pressure gets indicated at required location for monitoring the health of an engine (1) at all the operating conditions.
Fig. 5 shows the filter mounting face view of the adaptor having a protrusion part to locate the oil cooler in a specific angular position in accordance to the present invention. The adaptor (4) further provided with a protrusion part (15) to locate the oil cooler (5) in a specific angular position and avoid rotation of the oil cooler (5) in the servicing conditions. The oil cooler (5) is having two extended legs which will locate either side of the leg in the assembled condition. Positioning the protrusion part (15) of the adaptor (4) between the legs of the oil cooler (5) helps in to lock the oil cooler (5) against any rotation. This will help to optimize length of the hose connected to the oil cooler (5) and avoid damage due to rotation of the oil cooler (5).
The improved mounting arrangement integrates multifunction in the single module and ensures the compactness of an engine which is a crucial requirement of engine for automotive application. It provides a positional reference for the accurate location of the oil cooler and convenient and easy to access packaging for the oil cooler and the oil filter.
The adaptor facilitate in mounting of the combination of oil cooler and oil filter and connecting this combination to the cylinder block and allowing for the passage of lubricating oil from the main oil gallery in the cylinder block into the oil filter and return of the filtered oil back into the main oil gallery in the cylinder block after cooling of the oil.

The adaptor has a threaded internal diameter for the mounting of connector on which the oil filter and the oil cooler are rigidly located and free from disturbances arising out of engine vibrations. The as cast passage for the filtered and cooled oil return into the cylinder block has a provision for the rigid mounting of the oil pressure switch from which the signal for oil pressure is taken for the vehicle dashboard.
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 mounting arrangement for an oil filter of an internal combustion engine, comprising,
a cylinder block (2) with internal oil lines to lubricate the internal rotating parts; an adaptor (4) having angled faces (7, 8) respectively for attaching to the cylinder block (2) and mounting an oil filter (3), assembled with the side wall of the cylinder block (2), such that the inlet passage (11) and outlet passage (12) on the attaching face (7) of the adaptor (4) mate with the inlet and outlet passages on the machined surface of the cylinder block (2);
a connector (6) having through hole connecting the adaptor (4) and the oil filter (3), such that the connector (6) channellize the oil communication between the cylinder block (2) and the oil filter (3) through the adaptor (4), and the oil filter (3) is prevented from having direct contact with the side wall of the cylinder block (2);
2. The mounting arrangement as claimed in claim 1, wherein an oil cooler (5) is secured between the adaptor (4) and the oil filter (3), wherein the oil cooler (5) surrounds the connector (6) and provide a circumferential passage for the oil flow to the oil filter (3) and simultaneously cool the passing oil.
3. The mounting arrangement as claimed in claim 1, wherein the adaptor (4) aligns the oil filter (3) parallel to the longitudinal axis of the engine (1).
4. The mounting arrangement as claimed in claim 1, wherein the mounting face (8) and the attaching face (7) of the adaptor (4) is formed at an angle between 0 deg to 180 deg.

5. The mounting arrangement as claimed in claim 1, wherein the mounting face (8) is having inner (10) and outer (9) concentric circular flanges.
6. The mounting arrangement as claimed in claim 1, wherein the connector (6) on which the oil filter (3) is located is positioned on the threaded inner flange (10) of the adaptor (4).
7. The mounting arrangement as claimed in claim 1, wherein Oil inlet and oil return lines in the main oil gallery are connected through the machined surface to carry the oil from the cylinder block (2) and back to the cylinder block (2).
8. The mounting arrangement as claimed in claim 1, wherein the adaptor (4) is provided with a protrusion part (15) to locate the oil cooler (5) in a specific angular position and avoid rotation of the oil cooler (5).
9. The mounting arrangement as claimed in claim 1, wherein a pressure switch is placed on a bore (14) located at the oil flow out let passage of adaptor (4) to measure the oil pressure.
10. An internal combustion engine having a mounting arrangement for oil filter (3) and oil cooler (5), as claimed in any one of the preceding claims.
11. The mounting arrangement as claimed in claim 1, wherein the adaptor (4) is assembled with the cylinder block (2) through fasteners.
12. The mounting arrangement as claimed in claim 1, wherein the adaptor (4) is made of aluminium.

13. The mounting arrangement as claimed in claim 1, wherein the oil filter (3) is mounted on the adaptor (4) through the threads formed on the connector (6).