Patent ID: 7745953
Filing Date: 2010-06-29
Classification: F02N,H02J,Y02T

Abstract:
1. A power train for a hybrid vehicle comprising: an internal combustion engine having a drive shaft; a transmission having an input shaft connected mechanically the drive shaft of the internal combustion engine and an output shaft connected mechanically to drive wheels; an alternating-current reversible electric machine which may operate as both an electric motor and an electric generator and can exchange mechanical power with the drive shaft of the internal combustion engine and with the drive wheels; a direct-current energy storage system; a two-way electronic converter connecting electrically the reversible electric machine to the energy storage system and allowing reversible electric machine to operate in generator mode and motor mode; wherein the direct-current energy storage system comprises: a battery, a capacitive element connected in parallel to terminals of the battery, and an inductive element connected in series to the battery, between the battery and the capacitive element; and wherein to effectively regulate power/energy flow between the battery and the capacitive element during charge or discharge transients of the battery: the quotient of the capacity of the battery measured in Ampere-hour Ah divided by the capacitance of the capacitive element measured in Farad F is less than 1; and quotient of the capacity of the battery measured in Ah divided by the inductance of the inductive element measured in microHenry μH is less than 1.