Interrelated power delivery controls – including engine control – Transmission control – Engine controlled by transmission
Patent
1996-06-28
1998-04-14
Ta, Khoi Q.
Interrelated power delivery controls, including engine control
Transmission control
Engine controlled by transmission
477120, B60K 4104
Patent
active
057386056
ABSTRACT:
An anti-hunt transmission control strategy for controlling an automatic transmission so as to prevent the occurrence of a shift hunting condition. The control strategy determines a learned vehicle inertia as well as road load torque and expected torque in an upshift gear. A projected post shift acceleration is predicted based on the expected torque, road load torque and inertia of the vehicle. If vehicle speed and throttle position are within an allowable shift zone and if the predicted post shift acceleration exceeds a threshold value, the vehicle automatic transmission is allowed to upshift. Otherwise, should the predicted post shift acceleration not exceed the threshold value, an upshift is prevented.
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Fliearman Steven R.
Potter Kenneth J.
Zeiger Dennis R.
Calcaterra Mark P.
Chrysler Corporation
Kwon Peter T.
Ta Khoi Q.
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