System and method for reducing vacuum degradation in a vehicle

摘要

An engine including a lubricated vacuum source is disclosed. In one example, engine oil entrained in gases lubricates a vacuum pump. The approach may provide for improved efficiency when generating vacuum.

主权项

1. An engine vacuum system, comprising:
an engine including a crankcase vent and an oil separator located along the crankcase vent; and a vacuum pump in fluidic communication with the engine and a vacuum consumer, a vacuum pump inlet port in fluidic communication with a passage entering an interior of the engine, the passage absent an oil pump along its length.