Observer-based feedback control during torque phase of clutch-to-clutch shift process
by Bingzhao Gao; Hong Chen; Jun Li; Kazushi Sanada; Lu Tian
International Journal of Vehicle Design (IJVD), Vol. 58, No. 1, 2012

Abstract: In order to improve the shift quality of Automatic Transmissions (ATs) adopting clutch-to-clutch shift technology, a feedback control strategy is proposed for the torque phase of shift process. With the estimated clutch torque, the off-going clutch is disengaged at the moment when transmitted torque is approaching zero, which contributes to the reduction of shift shock and prevention of clutch tie-up. The proposed control strategy is tested on a complete powertrain simulation model. It is verified that the system is robust to the variations of driving conditions, such as vehicle mass and road grade, etc.

Online publication date: Tue, 23-Apr-2013

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