METHOD FOR CONTROLLING MOTOR/GENERATOR COOLING IN A MULTI-MODE TRANSMISSION
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United States of America Patent
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N/A
Issued Date -
May 5, 2011
app pub date -
Nov 2, 2009
filing date -
Nov 2, 2009
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A method for controlling cooling of one or more motor/generators includes monitoring the stator temperature of the motor/generator and power loss of the motor/generator. Total cooling flow is estimated from the monitored stator temperature and power loss and a cooling line pressure is determined from a lookup table. The lookup table includes total cooling flow as a function of cooling line pressure. The method further determines a non-cooling line pressure and combines the non-cooling line pressure with the cooling line pressure to determine a first total line pressure. The transmission is commanded to operate at the first total line pressure.
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