In particular, a drive system for a vehicle and a method for counteracting changes in the no-load speed in the drive system

摘要

An apparatus for controlling an idling speed of an internal combustion engine is disclosed. The apparatus includes an electric machine operatively coupled to the internal combustion engine for applying a braking torque to the internal combustion engine to reduce the idling speed and for applying a driving torque to the internal combustion engine to increase the idling speed. It also includes a controller for controlling the electric machine. The controller is responsive to a load change to control the electric machine to apply one of a braking torque and a driving torque to the internal combustion engine to substantially maintain the idling speed at a predefined level.