Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Patent
1995-06-07
1997-03-11
Wright, Dirk
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
477906, B60K 4108
Patent
active
056095481
ABSTRACT:
An electronic engine control controls the selection and confirmation of automatically selectable gears in a manual/automatic transmission. Failure to disengage the engine from the transmission within a predetermined time period, failure to reach a predetermined synchronous engine RPM window within another predetermined time period and failure to confirm gear engagement within yet another predetermined time period are three automatic shift failure modes which may cause an automatic shift attempt to fail or be aborted. A fourth automatic shift failure may occur if the clutch pedal is depressed during an automatic shift attempt. If any of the foregoing automatic shift failure mechanisms is detected, an error recovery algorithm which forms a part of the present invention determines the easiest/safest transmission gear to command to prevent the driver from having to manually attempt to engage the transmission after a failed automatic shift attempt.
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Gatewood Bryan S.
Griffen Peter J.
Kleine Richard E.
Webber Larry R.
White Gregory R.
Cummins Engine Company, Inc.
Wright Dirk
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