Internal combustion engine with lubrication system

摘要

An internal combustion engine for a vehicle, such as a motorcycle, includes a crankcase defining a sump, and a lubrication system scavenging oil from the crankcase and supplying oil to the crankshaft and to first and second cylinder heads. The lubrication system includes a pump with housing and rotor, the housing being fixed to the crankcase and the rotor being rotatable around a crankshaft axis and being rotated by the crankshaft. A plurality of oil supply passages extend through the crankcase, potentially including at least one being formed in the crankcase.

主权项

1. An internal combustion engine comprising:
a crankcase supporting a crankshaft for relative rotation on a crankshaft axis, the crankcase including:
a first portion including a first main bearing to rotatably support the crankshaft, anda second portion including a second main bearing to rotatably support the crankshaft, the second portion being coupled to the first portion so as to define a sump; first and second banks of cylinders extending between the crankcase and respective first and second cylinder heads; a lubrication system supplying oil to the crankshaft and to the first and second cylinder heads, the lubrication system including:
a pump including a housing and a rotor, the housing being fixed to one of the first and second portions of the crankcase;a plurality of oil supply passages extending through the crankcase, at least one of the plurality of oil supply passages being in the crankcase; andwherein the second portion further includes a plurality of camshaft apertures consisting of:a first camshaft aperture through which a first camshaft is adapted to pass;a second camshaft aperture through which a second camshaft is adapted to pass; anda third camshaft aperture through which a third camshaft is adapted to pass.