Patent ID: 6085723
Filing Date: 2000-07-11
Classification: F02B,H02P

Abstract:
For use with a vehicle having an internal combustion engine that exhibits torque fluctuations during idling, the internal combustion engine having a cold temperature state and a warm temperature state, an apparatus comprising:at least one electric machine coupled to the internal combustion engine for applying a torque with a varying amplitude to the internal combustion engine to reduce the torque fluctuations, the amplitude of the torque applied to the internal combustion engine by the electric machine being greater when the internal combustion engine is in the cold temperature state than when the internal combustion engine is in the warm temperature state; andan idle control system for setting an average target idling speed for the internal combustion engine, wherein the idle control system sets the average target idling speed at a first level when the internal combustion engine is in the warm temperature state and at a second level when the internal combustion engine is in the cold state, the second level being the same or lower than the first level.