Aspirator for internal combustion engine having integrated flow bypass and check valve

摘要

An aspirator for a brake system is provided having the integrated functions of a flow bypass and a check valve for automotive applications to achieve various suction flow openings in response to different engine operating condition to enhance brake boost performance. The brake system includes a brake vacuum booster, an engine having an intake manifold, an aspirator having a movable total flow divergence nozzle, the aspirator being connected to the manifold, and a vacuum line connecting the booster to the aspirator. The aspirator includes a body having an internal end wall. A biasing element such as a spring is provided between the movable total flow divergence nozzle and the internal end wall of the aspirator body. The body of the aspirator includes an air flow path having an upstream area and a downstream area. The movable motive flow nozzle is positioned in the downstream area of the flow path.

主权项

1. A brake system for a vehicle comprising:
a brake vacuum booster; an engine having an intake manifold; an aspirator having a movable flow divergence nozzle, said aspirator being connected to said manifold; and a vacuum line connecting said booster to said aspirator.