초록 ▼

A vehicle includes a motor/generator, a disconnect clutch disposed between the engine and the motor/generator, and a transmission disposed between the motor/generator and the vehicle drive wheels. The transmission includes an input clutch which is selectively engagable for facilitating torque transf

A vehicle includes a motor/generator, a disconnect clutch disposed between the engine and the motor/generator, and a transmission disposed between the motor/generator and the vehicle drive wheels. The transmission includes an input clutch which is selectively engagable for facilitating torque transfer between the motor/generator and the vehicle drive wheels. When an engine start is requested, the motor/generator is operated, and a start mode for the engine is determined based on a number of vehicle parameters. The transmission input clutch is partially disengaged to at least partially isolate the vehicle drive wheels from engine torque disturbances when the engine is started. The disconnect clutch is engaged, and the engine is fueled, thereby facilitating torque production by the engine.

대표청구항 ▼

What is claimed: 1. A method for starting an engine in a vehicle having an electric machine, a first clutch disposed between the engine and the electric machine for selectively connecting the engine to the electric machine, and a second clutch disposed between the electric machine and vehicle drive

What is claimed: 1. A method for starting an engine in a vehicle having an electric machine, a first clutch disposed between the engine and the electric machine for selectively connecting the engine to the electric machine, and a second clutch disposed between the electric machine and vehicle drive wheels, the second clutch being selectively engagable for facilitating torque transfer between the electric machine and the vehicle drive wheels, the method comprising:requesting an engine start;operating the electric machine;facilitating slip in the second clutch, thereby at least partially isolating the vehicle drive wheels from engine torque disturbances;engaging the first clutch with a rapid fill to bring a pressure of the first clutch to a first level;reducing the pressure of the first clutch to a second level, the second level being defined by a first function;reducing the pressure of the first clutch to a third level;controlling the pressure of the first clutch in accordance with a pressure profile until there is at least substantially no slipping in the first clutch; andfueling the engine, thereby facilitating torque production by the engine.