Jet pump for boosting pressure at an inlet supplied from a sump and second fluid source
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United States of America Patent
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Mar 20, 2007
Grant Date -
Mar 17, 2005
app pub date -
Sep 12, 2003
filing date -
Sep 12, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
The automatic transmission for motor vehicles includes a positive displacement pump, a sump hydraulically connected by a passage to the pump inlet, a line pressure control valve having a high pressure outlet, a passage carrying fluid from the control valve through a nozzle and an nozzle exit opening to the passage that connects the sump to the pump inlet. The high pressure passage has a cross section whose area decreases in the direction toward the pump inlet and terminates in a nozzle through which a high speed jet enters the low pressure passage through the nozzle exit opening.
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