Methods and system for improving launching of a hybrid vehicle

摘要

Systems and methods for improving launching of a stopped hybrid vehicle are presented. The systems and methods adjust speed of a motor to reduce lag between an increase in driver demand torque and torque being produced at vehicle wheels. In one example, motor torque is adjusted to a maximum motor torque to improve vehicle launch during select conditions where driver demand torque is not a maximum level.

主权项

1. A driveline method, comprising:
in response to a driver demand torque greater that a first threshold and less than a second threshold, applying a torque via a driveline integrated starter/generator (DISG) to a torque converter impeller from a condition where DISG rotation is stopped, the torque at least thirty percent greater than the driver demand torque.