Method and device for the regulation of an automatic transmission unit in motor vehicles
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Nov 23, 1993
Grant Date -
N/A
app pub date -
Nov 15, 1991
filing date -
Nov 22, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for regulating an automatic transmission unit having a plurality of coupling devices includes supplying a hydraulic medium to a control element; and supplying at least a portion of the hydraulic medium to a hydraulic regulating valve. The control element determines the portion of the hydraulic medium supplied to the hydraulic regulating valve and supplies that portion to the hydraulic regulating valve. The hydraulic regulating valve regulates an operational function of one of the coupling devices. When the central element fails, a safety device regulates the operational function of one of the coupling devices as a function of the revolution speed of a shaft of an engine.
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