Method and arrangement for controlling the output power of a drive unit of a motor vehicle
AssigneeRobert Bosch GmbH
InventorHong Zhang
Life of this patent
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Abstract
The invention is directed to a method and an arrangement for controlling the output power of a drive unit of a motor vehicle wherein a desired output torque command is determined on the basis of the driver command. A desired engine torque is computed from this desired output torque command while considering the torque transmission of a converter unit of an automatic transmission in all steady-state operating states. The converter unit is equipped with a controllable clutch. The desired engine torque is prepared by adjusting the output parameters of the engine.
Claims11
A method for controlling the output power of a drive unit of a vehicle, the drive unit including a motor and a power transmitting assembly connected to the output of the motor, the power transmitting assembly including a converter, a clutch bridging the converter and a transmission unit, the clutch being controllable so as to be in an open state, in a closed state and in an intermediate state between said open and closed states, the method comprising the steps of:
- determining a desired output torque (mabdes) of said power transmitting assembly;
- converting said desired output torque (mabdes) into a motor torque (mmot);
- determining whether said clutch is in said intermediate state between said open and closed states;
- while said clutch is in said intermediate state, computing said motor torque in accordance with the transmission gear ratio (G), said desired output torque (mabdes) and the torque transmitted by said converter and said clutch;
- and,
- adjusting said desired output torque (mabdes) of said power transmitting assembly by setting said computed torque.
An arrangement for controlling the output power of a drive unit of a vehicle, the drive unit including a motor and a power transmitting assembly connected to the output of the motor, the power transmitting assembly including a converter, a clutch bridging the converter and a transmission unit, said clutch being controllable so as to be in an open state, in a closed state and in an intermediate state between said open and closed states, the arrangement comprising:
- an electronic control unit for determining a pregiven desired output torque (mabdes) of said power transmitting assembly and for converting said desired output torque (mabdes) into a motor torque (mmot);
- said electronic control unit including means for determining whether said clutch is in said intermediate position and for computing the motor torque in accordance with the transmission gear ratio (G), said desired output torque (mabdes) and the torques transmitted by said converter and said clutch;
- and,
- said electronic control unit including means for adjusting said output torque (mabdes) by setting the computed motor torque.
Dependencies are inferred from the claim text.