VACUUM BRAKE BOOSTER VACUUM ENHANCER

摘要

A vacuum enhancer having four apertures, one of which is open to the atmosphere, wherein a piston selectively restricts fluid flow through an ejector based on a pressure differential between a vacuum chamber within the vacuum booster and true atmospheric pressure.

主权项

1. A brake booster vacuum enhancer comprising:
a housing defining an aperture-1 connectable to a booster, an aperture-2 connectable to an intake manifold, an aperture-3 connectable to an intake air-duct, and an aperture-4 open to the atmosphere; a check-valve disposed between aperture-1 and aperture-2; an ejector disposed between aperture-2 and aperture-3; and a piston disposed between aperture-3 and aperture-4 configured to selectively restrict fluid flow through the ejector based on pressure differential between aperture-1 and aperture-4.