Oil strainer and oil storage device for vehicle

1. An oil storage device for a vehicle comprising:

an oil pan connected to a lower portion of a combustion engine; and

an oil strainer disposed within the oil pan connected to a lower portion of a combustion engine, the oil strainer sucking an oil, wherein

the oil strainer comprises:

a strainer main body accommodating a filter element and extending along an inclined reference plane inclined relative to a horizontal line;

a suction port formed in a lower portion of the strainer main body; and

a discharge port formed in an upper portion of the strainer main body, an inclined surface is formed on an inner bottom surface of the oil pan so as to extend gradually upwardly in one of frontward and rearward directions of the vehicle,

the oil strainer is disposed along the inclined surface,

a discharge pipe portion having the discharge port is inserted into a connection portion provided in a crankcase of the combustion engine, from below,

a support surface is formed on the strainer main body, the support surface being concaved upwardly from a lower surface of the strainer main body, and

a seating surface on which the support surface is seated is formed on the inclined surface, the seating surface projecting upwardly from the inclined surface.

2. The oil storage device for the vehicle as claimed in claim 1 , wherein an inlet through which an oil is introduced into the oil pan confronts an upper surface of the strainer main body from above.

3. The oil storage device for the vehicle as claimed in claim 2 , wherein the inlet is an outlet of a relief valve of an oil passage.

4. The oil storage device for the vehicle as claimed in claim 1 , wherein the strainer main body is inclined gradually upwardly towards the rear of the vehicle.

5. The oil storage device for the vehicle as claimed in claim 1 , wherein

the oil pan includes a deep portion and a shallow portion shallower than the deep portion,

the suction port of the oil strainer is located in the deep portion of the oil pan, and

a drain hole for draining the oil within the oil pan is formed in a wall of the deep portion of the oil pan.

6. The oil storage device for the vehicle as claimed in claim 1 , wherein the lower surface of the strainer main body extends in the vicinity of and substantially parallel to the inclined surface.

7. A motorcycle comprising an oil storage device, which oil storage device comprises:

an oil pan connected to a lower portion of a combustion engine; and

an oil strainer disposed within the oil pan, the oil strainer sucking an oil, wherein the oil strainer comprises:

a strainer main body accommodating a filter element and extending along an inclined reference plane inclined relative to a horizontal line, wherein a support surface is formed on the strainer's main body, the support surface having a plurality of upwardly concaved portions and the oil pan includes upwardly concaved portions spaced and aligned with the plurality of upward concaved portions of the support surface;

a suction port formed in a lower portion of the strainer main body; and

a discharge port formed in an upper portion of the strainer main body,

an inclined surface is formed on an inner bottom surface of the oil pan so as to extend gradually upwardly in one of frontward and rearward directions of the vehicle,

the oil strainer is disposed such that a lower surface of the strainer main body extends along the inclined surface,

the oil pan includes a deep portion located on one side in a vehicle widthwise direction and a shallow portion located on the other side in the vehicle widthwise direction, a deep portion bottom surface being positioned lower than a shallow portion bottom surface, and

an exhaust pipe is fluidly connected with an exhaust port in a front surface of a cylinder head of the combustion engine, and extends rearwardly below the shallow portion to be fluidly connected with a muffler at a location rearwardly of the combustion engine.

8. The motorcycle as claimed in claim 7 , wherein a lower end of a portion of the oil pan, which portion corresponds to the deep portion, is located at substantially the same height as a lower end of the exhaust pipe.

9. The motorcycle as claimed in claim 7 , wherein

the deep portion bottom surface forming a lowermost surface of the oil pan, is formed in the deep portion, and

the inclined surface is inclined gradually upwardly towards the rear from the deep portion bottom surface.