Patent ID: 9079485
Filing Date: 2015-07-14
Classification: B60K,B60L,B60W,Y02T

Abstract:
1. A hybrid electric drive system for an automotive vehicle comprising: a heat engine outputting power through a crankshaft; a transmission having an input shaft and an output shaft; an electric motor having a motor shaft being connected to said input shaft; a one-way-clutch disposed between said crankshaft and said motor shaft, being able to transmit torque from said crankshaft to said motor shaft but nut from said motor shaft to said crankshaft; and a torque-limiting device disposed between said crankshaft and the rotor of said electric motor, said torque limiting device selectively coupling said crankshaft and said motor shaft, said torque-limiting device transmitting a pre-determined level of torque when engaged; wherein when said torque-limiting device is disengaged, said motor can drive the vehicle solely; when said torque-limiting device is engaged, said motor can crank said engine; in order to start said engine while the vehicle is running, said torque-limiting device is engaged and transmits a torque to crank said engine and smoothes out the reaction torque peak that said crankshaft applies on said motor shaft; said engine outputs power through said one-way-clutch to said motor shaft and said input shaft.