OIL COOLER FOR A TWO WHEELED VEHICLE

FIELD OF INVENTION

[0001] The present invention generally relates to a heat exchanging unit for an engine of a two wheeled vehicle and more particularly to the mounting mechanism of said heat exchanging unit with respect to the engine.

BACKGROUND OF THE INVENTION

[0002] Generally, in two wheeled vehicles with high capacity engines heat exchangers/oil coolers are used to reduce temperature of engine and engine oil. This oil cooler also reduces the temperature of the lubrication oil so that temperature generated deterioration of lubrication oil can be avoided for better performance of engine.

[0003] Installation of said heat exchanger, oil pipes (inlet and outlet) passes under the vertical portion of the exhaust pipe. This location of inlet and outlet pipes obstructs the air flow towards the fins of the engine and the inlet for air circulation around the combustion chamber.

[0004] Further, due to close proximity of both exhaust pipe and engine on its both sides, temperature of said pipes increases and heats up the circulating oil resulting in poor performance of the oil cooler.

SUMMARY OF THE INVENTION

[0005] Main objective of present invention is to provide a mounting mechanism for a heat exchanging unit for engine of two wheeled vehicle. Said heat exchanger unit e.g. an oil cooler (hereinafter) is secured in proximity of the engine such that inlet and outlet pipes of the oil cooler are routed above the exhaust pipe. These pipes form an oil flow passages from oil cooler to engine crankcase/cover and from engine crankcase/cover to oil cooler. As oil pipes are passing above the exhaust pipe this area below it is vacant and flowing air directly reaches to cylinder head fins (engine) hence overall engine cooling improves. Further, one side of the oil inlet and outlet pipes are exposed away from any heat surface (exhaust pipe) thus surrounding temperature is controlled.

[0006] Summary provided above explains the basic features of the invention and does not limit the scope of the invention. Additional detailed information related to the enablement of the invention will be provided in the detailed description and accompanying claims. Scope of the invention shall be based on the claims provided.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

[0007] The present invention will become more fully understood from the detailed description given herein below and the accompanying drawing(s). Provided drawings' are incorporated in and constitute embodiments of the invention and illustrates several aspects of the invention and together with a description of the embodiments serve to explain the principles of the invention. Drawings given below are provided to support the description of the invention and are not limiting the scope of the present invention. A brief description of the drawing is as follows:

Figure 1 depicts a two wheeled vehicle explaining different embodiments of the vehicle and mounting details related to the claimed invention.

Figure la shows a depiction of existing mounting arrangement for oil cooler in two wheeled vehicles.

Figure 2, Figure 3 shows essential embodiments of the claimed invention.

Figure 4 describes enabling arrangement of the essential embodiments of the claimed invention.

DETAILED DESCRIPTION OF THE INVENTION

[0008] The embodiments disclosed below are not intended to be exhaustive or to limit the invention to the precise forms disclosed in the following detailed description. Rather, the embodiments are chosen and described so that best enabling arrangements of the invention can be explained through all possible embodiments and examples of it. The invention may have application to all kind of two wheeled vehicles.

[0009] Referring to Figure 1 shows side view of concerned two wheeled vehicle in the form of a motorcycle M capable to incorporate the present invention. The motorcycle M comprises a body frame assembly made up of a number of tubes welded together. The motorcycle M has a steerable front wheel 105 and a driven rear wheel 110.

[0010] The anterior portion of the motorcycle M placed forward to the fuel tank 114 comprises of a headlamp assembly, the headlamp assembly further comprising a headlamp 103 and a visor 102 placed forward to a handlebar assembly 100.

[0011] The said motorcycle M is powered by an internal combustion engine 106 (hereinafter "engine") disposed below the main tube and supported by the down tube.

[0012] In high power engines 106, heat generated during engine operation is very high thus cooling units/heat exchangers 115 like oil cooler are much required.

Also optimisation of air cooling is equally required to ensure maximum cooling of the engine 106 and neighbouring embodiments to ensure better efficiency of the motorcycle M.

[0013] As shown in Figure la, a typical prior art embodiment for said cooling arrangement is shown. Oil cooler 115 is mounted above the cylinder head and inlet 107p and outlet 108p pipes are passing under the vertical portion 109a of the exhaust pipe 109. As shown in Figure, mentioned pipes 107p and 108p covers maximum area under the exhaust pipe due to that air flow towards the cylinder head is obstructed.

[0014] Further, while passing under the exhaust pipe mentioned inlet and outlet pipes are sandwiched between the exhaust pipe and the cylinder head of the engine due to which temperature of the oil flowing through it increases.

[0015] In order to address above mentioned issue present invention discloses a mounting mechanism for oil cooler 115. As shown in Figure 2, Figure 3 and Figure 4, for best mode enablement, oil cooler 115 is secured in a plane above the engine 106 such that it is minimally exposed to engine heat. Inlet 107 and outlet 108 pipes of the oil cooler 115 are fixed on different locations on the crankcase of the engine 106. These pipes 107, 108 form an oil flow passages from oil cooler 115 to engine 106 crankcase and vice versa.

[0016] Said inlet 107 and outlet 108 pipes are routed above the vertical portion 109a of the exhaust pipe 109 such that area below said exhaust pipe remains vacant. As oil pipes 107, 108 are passing above the exhaust pipe 109, this area below is vacant and flowing air 117 directly reaches to the predetermined segment e.g. cylinder head fins and the air inlet 118 for the cylinder block. Said air inlet 118 facilitates entry of air 117 in the passage formed surrounding the cylinder block such that passing air reduces the temperature and exits from the air outlet 119.

[0017] As shown in Figure la, inlet and outlet pipes covers the space in front of said air inlet thus flow of air gets obstructed. In disclosed invention, Inlet 107 and outlet 108 pipes of the oil cooler 115 are fixed on different locations on the crankcase of the engine 106 and passes above the exhaust pipe 119 leaving the area in front of air inlet 118 free.

[0018] Further as shown, inlet pipe is fixed with the oil cooler at joint 107a-115a and is routed above the exhaust pipe 109 such that it is forming an L shape curve above it. This L shape curve is made such that inlet pipe 107 is maintained at a predetermined distance from the exhaust pipe 109. This L shape curve is made in such a way that it protrudes away from the cylinder head of the engine 106 leaving a considerable surface of the inlet pipe 107 towards flowing air 117 that increases its cooling as well.

[0019] Towards the end of said inlet 107b pipe, it is secured with the engine 106 crankcase such that it maintains same predetermined distance D from the engine 106 casing and exposed area to the flowing air 117.

[0020] As shown in Figure 2 to Figure 4, in similar fashion outlet pipe 108 is fixed with the oil cooler 115 at joint 115b-108a and is extended downwards towards crankcase of the engine 106 passing above the exhaust pipe forming an L shape curve. Said outlet pipe 108 also maintains mentioned predetermined distance D from the exhaust pipe 109 and the engine 106 throughout its length 108a-108b.

[0021] As explained above, one side of the oil inlet 107 and outlet 108 pipes are exposed away from any heated surface (exhaust pipe 109) thus surrounding temperature is controlled. Hence efficiency of the oil cooler 115 can also be increased with claimed invention.

WHAT IS CLAIMED IS

1) A two wheeled vehicle comprising a frame structure supporting an engine transmitting power to the transmission unit facilitating traction of vehicle, wherein an exhaust port of the engine is connected to an exhaust pipe of the exhaust system and wherein an oil cooler is secured in proximity of the engine characterized in that at least one oil cooler pipe is routed above the exhaust pipe and is connected to the engine facilitating oil flow through engine crankcase.

2) A two wheeled vehicle, as claimed in claim 1, wherein the oil cooler pipe is routed above the exhaust pipe such that a predetermined segment of the engine is exposed to the external atmosphere.

3) A two wheeled vehicle, as claimed in claim 1, wherein the oil cooler pipe is secured above the exhaust pipe at a predetermined distance.

4) A two wheeled vehicle, as claimed in claim 3, wherein the oil cooler pipe is forming a L shape curve above the exhaust pipe.

5) A two wheeled vehicle, as claimed in claim 1, wherein the oil cooler is secured in a plane above the engine.

6) A two wheeled vehicle, as claimed in claim 1, wherein the oil cooler pipe is defining an inlet pipe and an outlet pipe wherein the inlet pipe is routed above the exhaust pipe.

7) A two wheeled vehicle, as claimed in claim 1, wherein the oil cooler pipe is defining an inlet pipe and an outlet pipe wherein the inlet pipe and the outlet pipe are routed above the exhaust pipe.