Internal combustion engine.

摘要

An internal combustion engine comprises a cylinder head (1), a cam shaft (2) mounted thereon, a rocker cover (4) and a rotary vacuum pump (10) mounted on the cylinder head (1) within the rocker cover (2) and driven by the cam shaft (2), providing compact packaging and low noise levels. The vacuum pump is lubricated from the cam shaft via an exhaust port (30) discharging into the rocker cover.