Electronically controlled automatic transmission
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United States of America Patent
Stats
-
Jul 10, 1990
Grant Date -
N/A
app pub date -
Dec 9, 1987
filing date -
Dec 10, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
If a driver wishes to start off an automotive vehicle in second or third gear when the vehicle is at rest on a road surface having a low coefficient of friction, as is the case when a road surface is covered with snow, the driver operates a winter mode selection switch while the transmission is in the speed range in which the vehicle ordinarily travels, i.e. the D range. After the vehicle has started off in the higher gear following use of the switch, the transmission switches over to the ordinary travel mode automatically as vehicle velocity rises. In a case where the engine is turned off and then restarted, the transmission switches over to the ordinary travel mode automatically. This eliminates any inconvenience that might be caused by forgetting to operate the switch prior to the restarting of the engine.
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