Patent ID: 7294938
Filing Date: 2007-11-13
Classification: B60K,B60L,B60W,F02N,Y02T,Y10S,Y10T

Abstract:
1. A method of controlling a vehicle driving system; (A) by accumulating an output power of an engine operating intermittently in a flywheel interlocked with the engine as rotational energy, transmitting the output power of the engine or the accumulated energy to an output shaft by way of a power transmission system to drive the output shaft and drive wheels of vehicle interlocked with the output shaft to rotate, (B) the power transmission system; (C) all the electric power generated by the first motor generator being supplied to the second motor generator and subjected to basic control of indicating the value of drive torque T (D) determining the torque Trd by the relation of  where {circle around (1)}Trd is a torque of the reactionary shaft, {circle around (2)}ηmr is a power transmission efficiency from the input shaft to the reactionary shaft by way of the differential gear, {circle around (3)}ηmo is a power transmission efficiency from the input shaft to the output shaft by way of the differential gear, {circle around (4)}ηe is a power transmission efficiency from the reactionary shaft to the output shaft by way of the first motor generator and the second motor generator, while {circle around (5)}ec is a critical speed ratio of the differential gear, {circle around (6)}N (E) controlling generation of electric power of the first motor generator so as to cause the reactionary shaft to produce the torque Trd.