Method and system for vacuum generation
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United States of America Patent
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Sep 6, 2016
Grant Date -
Jun 19, 2014
app pub date -
Jul 24, 2013
filing date -
Dec 13, 2012
priority date (Note) -
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Abstract
Methods and systems are provided for controlling motive flow through an ejector using a pneumatically controlled valve. A valve coupled upstream of an intake ejector may be adjusted based on boost pressure to control motive flow into the ejector from upstream of a compressor. This allows motive flow through the ejector to be controlled based on vacuum needs at low component cost without loss of boost pressure.
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