Control system for a motor vehicle transmission comprising a torque converter or a hydrodynamic clutch
AssigneeZF Friedrichshafen AG
InventorPeter Schiele
Life of this patent
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Abstract
A control system for a transmission comprising a torque converter or a hydrodynamic clutch in a motor vehicle, at least one torque-conducting clutch or brake in the starting operation of the motor vehicle. It is proposed to regulate the starting power of the motor vehicle as function of a driver's wish, via a slip clutch or brake mounted in the transmission, taking into account parameters of the torque converter and/or hydrodynamic clutch.
Claims16
A control system of a transmission for a motor vehicle having one of a torque converter and a hydrodynamic clutch, comprising:
- at least one of a torque-conducting slip clutch and brake for use in a starting operation of the motor vehicle,
- the starting power of the motor vehicle being regulated as function of a driver's wish via the at least one of a torque-conducting slip clutch and brake mounted in the transmission and as a function of characteristics of the one of the torque converter and of the hydrodynamic clutch, wherein
- before a starting operation of the motor vehicle torque transmission of the at least one of a torque-conducting sliip clutch and brake is regulated as a function of characteristics of the one of the torque converter and of the hydrodynamic clutch to compensate for a hydraulic torque absorption of the one of a torque converter and a hydrodynamic clutch, and
- during the starting operation of the motor vehicle an output torque (M_Ab) of the motor vehicle is regulated, as function of the driver's wish, via one of the torque-conducting slip clutch and brake.
A control system of a transmission for a motor vehicle, having one of torque converter and a:
- at least one of a torque-conducting clutch and brake for use in starting operation of the motor vehicle, the starting power of the motor vehicle being regulated, as function of a driver's wish,
- via one of a slip clutch and brake mounted in the transmission, including characteristics of of the torque converter and of the hydrodynamic clutch, wherein during the;
- output torque (M_Ab) of the motor vehicle is regulated, as function of driver's wish, via one of the slip clutch and brake, wherein one of the torque converter and hydrodynamic clutch has a pump and a turbine and wherein the characteristics of one of the torque converter and of the hydrodynamic clutch are one or more of the parameters including:
- a type of one of the torque;
- converter and the hydrodynamic clutch,
- maximum torque reinforcement (mue_max) of the torque converter,
- a pump torque (M_P2000) of the torque converter at an input rotational speed of 2000 1/min,
- a characteristic line (M_P=f(n_P) of a pump torque (M_P) as a function of a pump rotational speed (n_P),
- a characteristic line (mue=f(nue) of a torque ratio (mue) as function of a rotational speed ratio (nue), the torque ratio (mue) being defined as a quotient of turbine torque (M_T) and a pump torque (M_P) and the rotational speed ratio as a quotient of turbine rotational speed (n_T) and pump rotational speed (n_P),
- a characteristic line of an efficiency degree of the torque converter and of the hydrodynamic clutch as a function of a rotational speed ratio (nue),
- a characteristic line (M_T=f(n_T)) of a turbine torque (M_T)as a function of a turbine rotational speed (n_T), and
- a characteristic line (M_P=f(n_T)) of pump rotational speed (n_P) as a function of a turbine rotational speed (n_T), and
- a characteristic line of an efficiency degree of the torque converter or of the hydrodynamic clutch as a function and the turbine rotational speed (n_T).
Dependencies are inferred from the claim text.