VACUUM PRODUCER INCLUDING AN ASPIRATOR AND AN EJECTOR
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United States of America Patent
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Issued Date -
Mar 3, 2016
app pub date -
Aug 26, 2014
filing date -
Aug 26, 2014
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Abstract
A vacuum producer for supplying vacuum to a device in a boosted engine air system is disclosed. The boosted engine air system includes a throttle. The vacuum producer includes a first engine connection, a second engine connection, an aspirator, an aspirator check valve, an ejector, and an ejector check valve. The first engine connection is fluidly connected to atmospheric pressure and the second engine connection is fluidly connected to the engine air system at a location upstream of an intake manifold of an engine and downstream of the throttle. The aspirator provides vacuum to the device if pressure at the intake manifold is below atmospheric pressure. The ejector provides vacuum if pressure at the intake manifold is above atmospheric pressure.
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