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Automated manual transmission shift sequence controller

United States Patent

6,019,698
February 1, 2000
View the Complete Patent at the US Patent & Trademark Office
A powertrain system for a hybrid vehicle. The hybrid vehicle includes a heat engine, such as a diesel engine, and an electric machine, which operates as both, an electric motor and an alternator, to power the vehicle. The hybrid vehicle also includes a manual-style transmission configured to operate as an automatic transmission from the perspective of the driver. The engine and the electric machine drive an input shaft which in turn drives an output shaft of the transmission. In addition to driving the transmission, the electric machine regulates the speed of the input shaft in order to synchronize the input shaft during either an upshift or downshift of the transmission by either decreasing or increasing the speed of the input shaft. When decreasing the speed of the input shaft, the electric motor functions as an alternator to produce electrical energy which may be stored by a storage device. Operation of the transmission is controlled by a transmission controller which receives input signals and generates output signals to control shift and clutch motors to effect smooth launch, upshift shifts, and downshifts of the transmission, so that the transmission functions substantially as an automatic transmission from the perspective of the driver, while internally substantially functioning as a manual transmission.
Lawrie; Robert E. (Whitmore Lake, MI), Reed; Richard G. (Royal Oak, MI), Rausen; David J. (Denver, CO)
DaimlerChysler Corporation (Auburn Hills, MI)
08/ 980,683
December 1, 1997
STATEMENT OF GOVERNMENT INTEREST The government of the United States of America has rights in this invention pursuant to Subcontract No. ZAN-6-16334-01 awarded by the U.S. Department of Energy.