Cooling a control device of the gearbox of a motor vehicle
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United States of America Patent
Stats
-
Feb 10, 2004
Grant Date -
N/A
app pub date -
May 31, 2001
filing date -
Dec 1, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of adjusting an operating temperature of a control device (2) of a motor vehicle automatic transmission. The transmission control has a hydraulic unit (3) and an electronic unit (4) with electronic modules. The control device (3)is situated in a transmission housing which is partially filled with transmission oil and at least partly surrounded by transmission oil. The control device (2) has a cooling device (5) by which at least part of the electronic unit (4) is cooled with the transmission oil. The transmission oil has a temperature .THETA..sub.C which is lower than a prevailing transmission oil temperature .THETA..sub.G. The electronic unit (4) is impinged upon with a defined volume flow of the transmission oil.
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