Lubrication structure for internal combustion engine
First Claim
1. A lubrication structure for an internal combustion engine comprising:
- an oil pump provided at a first end of an oil pump shaft, said oil pump shaft arranged in parallel with a crankshaft;
a plurality of oil passageways extending from a side surface of a pump chamber of the oil pump to a second end of the oil pump shaft, said oil passageways arranged in parallel with the oil pump shaft;
an oil filter positioned facing towards the oil passageways; and
an oil communicating passageway extending vertically from a first oil passageway to the oil filter, wherein the oil filter protrudes forward from a crankcase of the engine.
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Abstract
A lubrication structure for an internal combustion engine including an oil pump provided at a first end of an oil pump shaft arranged parallel to a crankshaft. Oil passageways are formed from a side surface of a pump chamber of the oil pump to another end of the oil pump shaft in parallel with the oil pump shaft. An oil filter is provided facing towards the oil passageways. A communicating passageway extending vertically from the oil passageways to the oil filter is also provided. This arrangement provides a lubrication structure for an internal combustion engine with a high degree of freedom with respect to oil filter arrangement with a simple oil passageway that is easy to manufacture, requires relatively small space for arrangement, and thus makes it possible to reduce the size of the internal combustion engine.
16 Citations
18 Claims
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1. A lubrication structure for an internal combustion engine comprising:
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an oil pump provided at a first end of an oil pump shaft, said oil pump shaft arranged in parallel with a crankshaft;
a plurality of oil passageways extending from a side surface of a pump chamber of the oil pump to a second end of the oil pump shaft, said oil passageways arranged in parallel with the oil pump shaft;
an oil filter positioned facing towards the oil passageways; and
an oil communicating passageway extending vertically from a first oil passageway to the oil filter, wherein the oil filter protrudes forward from a crankcase of the engine. - View Dependent Claims (2, 3, 4, 5)
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6. A lubrication structure for an internal combustion engine, the internal combustion engine including a crankcase divided into a left crankcase and a right crankcase along a longitudinal centerline, and having a crankshaft arranged transversely therein, said lubrication structure comprising:
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an oil pump having a pump chamber provided at a first end of an oil pump shaft, said oil pump shaft arranged in parallel with the crankshaft;
a plurality of oil passageways extending from a side surface of the pump chamber of the oil pump to a second end of the oil pump shaft, said oil passageways arranged in parallel with the oil pump shaft;
an oil filter positioned facing towards the oil passageways;
an oil introduction passageway extending vertically from a first oil passageway to the oil filter; and
an oil discharge port forming an oil supply passageway from an oil pan positioned in a lower portion of said crankcase. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification