초록 ▼

An engine control system is operable to provide an engine fueling rate equal to the larger of a first engine fueling rate at which the resulting engine torque is limited by a maximum input torque capacity of a presently engaged gear ratio of the transmission and a second engine fueling rate at which

An engine control system is operable to provide an engine fueling rate equal to the larger of a first engine fueling rate at which the resulting engine torque is limited by a maximum input torque capacity of a presently engaged gear ratio of the transmission and a second engine fueling rate at which the resulting engine torque is limited by a nominal input torque capacity of the transmission. The foregoing technique can be enabled at all times, or alternatively only after determination that the vehicle is experiencing deceleration under heavy engine load conditions. The engine control system may be further operable to determine a third engine fueling rate at which the resulting engine output torque is limited by a maximum operating torque capacity of the transmission propeller shaft, as well as a fourth engine fueling rate at which the resulting engine output torque is limited by a maximum operating torque capacity of the drive axle connected thereto. The actual engine fueling rate is then chosen to be the minimum of the larger of the first and second engine fueling rates, the third engine fueling rate, and the fourth engine fueling rate. This technique can be enabled either at all times, or alternatively only when the presently engaged gear ratio is one of a set of lower gear ratios of the transmission.

대표청구항 ▼

[ What is claimed is:] [1.] A method of regulating torque applied to an automotive drive train by an internal combustion engine, the engine producing the torque in accordance with a fueling rate provided to a fueling system thereof, the drive train including a transmission coupled to the engine and

[ What is claimed is:] [1.] A method of regulating torque applied to an automotive drive train by an internal combustion engine, the engine producing the torque in accordance with a fueling rate provided to a fueling system thereof, the drive train including a transmission coupled to the engine and having a plurality of engageable gear ratios, a drive axle and a propeller shaft coupling the transmission to the drive axle, the method comprising the steps of:determining a first engine fueling rate at which the resulting engine torque is limited by a maximum input torque capacity of a presently engaged gear ratio of the transmission;determining a second engine fueling rate at which the resulting engine torque is limited by a maximum operating torque capacity of the propeller shaft;defining an actual engine fueling rate as a minimum of said first and second engine fueling rates; andfueling the engine in accordance with said actual engine fueling rate.