Line pressure control of automatic transmission
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United States of America Patent
Stats
-
Apr 19, 1994
Issued Date -
N/A
app pub date -
Mar 18, 1993
filing date -
Jun 8, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is disclosed a line pressure control for an automatic transmission of an automotive vehicle wherein the automatic transmission is drivingly coupled with the engine and transmits the engine torque by a hydraulically actuable coupling which is actuable by a pressurized hydraulic fluid which is as high as the line pressure. According to this control, a predetermined pattern of variation of the pressurized hydraulic fluid is changed to a second pattern upon detecting the occurrence of a change in an engine load beyond a predetermined degree, and the pressurized hydraulic fluid follows the second pattern temporarily, i.e., for a period of time.
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