Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Patent
1996-03-18
1997-10-07
Marmor, Charles A.
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
477 80, 477154, 477902, F16H 5948
Patent
active
056741510
ABSTRACT:
A shift control system of an automatic transmission controls operating forces on frictional engaging elements being engaged and disengaged with gear elements during a shift operation by generating a target transmission variable which prevents a rate of change of a corresponding target input rotational speed from inverting at the start of the shift operation and/or at the end of the shift operation. The target transmission variable may be the target input rotational speed, a target gear ratio, or other variable corresponding to a target input rotational speed which has a rate of change gradually changing at the start and end of the shift operation so as to avoid any inversion of the rate of change within a predetermined duration after the start of the shift operation and within a predetermined duration before the end of the shift operation. The target transmission variable is applied along with a detected actual transmission variable to a feedback control which produces a signal for correcting a control hydraulic pattern produced in shift logic to operate a current control which controls a linear solenoid valve operating hydraulic servos to control the frictional engaging elements.
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patent: 5389052 (1995-02-01), Kruse et al.
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patent: 5460583 (1995-10-01), Kitada et al.
de Schepper Frank
Suzuki Kenji
Aisin Aw Co. Ltd.
Kwon Peter T.
Marmor Charles A.
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