METHOD AND SYSTEM FOR TORQUE CONTROL

摘要

Methods and systems are provided for enabling a smooth transmission shift in a hybrid vehicle configured with a motor hybrid transmission. During an initial part of a transmission upshift, spark timing may be advanced from MBT to expedite torque reduction. Once engine speed has sufficiently reduced, and is within a threshold range of the desired engine speed, spark timing may be retarded until the transmission shift is completed.

主权项

1. A method for a hybrid vehicle, comprising:
during a transmission gear shift:
reducing engine speed by operating one or more cylinders with spark timing advanced of MBT; andwhen engine speed is lower than a threshold, operating the one or more cylinders with spark timing retarded from MBT.