Vehicle propulsion system and method for a vehicle
AssigneeGM Global Technology Operations LLC
InventorsKarl A Sime, Randall B Dlugoss
Life of this patent
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Abstract
A vehicle propulsion system includes an engine including a crankshaft and adapted to generate torque, a crankshaft sensor that outputs a signal that is indicative of a rotary position of the crankshaft, a transmission with a clutch that is connected to the engine to receive the torque from the engine, a drive member connected to the transmission to receive torque from the transmission, and a controller that commands operation of the clutch based upon the signal from the crankshaft sensor for controlling engine compression pulse disturbances as the engine speed changes from an elevated rpm to low or zero rpm as well as low or zero rpm to an elevated rpm.
Claims16
A vehicle propulsion system, the system comprising:
- an engine including a crankshaft and adapted to generate torque;
- a crankshaft sensor that outputs a signal that is indicative of a rotary position of the crankshaft;
- a transmission with a clutch that is connected to the engine to receive the torque from the engine;
- a drive member connected to the transmission to receive torque from the transmission;
- and
- a controller that commands operation of the clutch based upon the signal from the crankshaft sensor during a transition between an engine operating condition and an engine stop condition, wherein the controller commands operation of the clutch such that the clutch only partially engages, and wherein the controller commands operation of the clutch above a predetermined engine speed.
A method for controlling a vehicle propulsion system that includes an engine including a crankshaft and adapted to generate torque, a crankshaft sensor that outputs a signal that is indicative of a rotary position of the crankshaft, a transmission with a clutch that is connected to the engine to receive the torque from the engine, a drive member connected to the transmission to receive torque from the transmission, and a controller that commands operation of the clutch based upon the signal from the crankshaft sensor, the method comprising:
- determining whether the vehicle propulsion system is transitioning from an engine operating condition to an engine stop condition;
- and
- controlling operation of the clutch when the vehicle propulsion system transitions between an engine operating condition and an engine stop condition, wherein controlling operation of the clutch only partially engages the clutch, and wherein controlling operation of the clutch is above a predetermined engine speed.
Dependencies are inferred from the claim text.