Patent ID: 7053566
Filing Date: 2006-05-30
Classification: B60K,B60W,F16H,Y02T

Abstract:
1. A drive train for a hybrid electric vehicle comprising: an engine that provides propulsion power by burning fuel; a first motor/generator that is selectively switched between an electric motor for providing driving force and an electric generator for producing electric power; a second motor/generator that is selectively switched between an electric motor for providing driving force and an electric generator for producing electric power; a third motor capable of providing driving force; a transmission equipped with planetary gear sets having rotatable elements that are in connecting relationships with an output shaft connected to wheels, said engine, and said first and second motor/generators, said transmission being capable of transferring at least output of said engine to the wheels through the output shaft in a large driving force running mode obtained under a condition where said engine is in operation and at least one of said first and second motor/generators acts as the electric generator; and a controller that controls said first and second motor/generators and said third motor so that surplus power caused by power balance between said first and second motor/generators in the large driving force running mode is supplied to said third motor when the surplus power is generated.