Hydraulic control system for an automatic transmission having electronic transmission range selection with failure mode control
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United States of America Patent
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May 7, 2013
Grant Date -
Jul 14, 2011
app pub date -
Dec 9, 2010
filing date -
Jan 11, 2010
priority date (Note) -
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Abstract
A hydraulic control system for a transmission includes a source of pressurized hydraulic fluid that communicates with an electronic transmission range selection (ETRS) subsystem. The ETRS subsystem includes an ETRS valve, a park mechanism, first and second mode valve assemblies, a latch valve assembly, and a plurality of solenoids. The ETRS subsystem is configured to provide desired operating conditions during a plurality of potential failure conditions.
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