Method and apparatus for transmitting torque by using a clutch of an automatic planetary transmission as a start clutch in a motor vehicle
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsDetlef Mathiak, Rahim Pour
Life of this patent
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Abstract
A method and an apparatus for transmitting torque in a motor vehicle having an automatically-shifted transmission, which uses a friction clutch rather than a known hydrodynamic converter to transmit torque. An electronic control system controls the friction clutch automatically.
Claims14
An apparatus for transmitting torque in a motor vehicle comprising an automatically-shifted planetary transmission, a friction clutch arranged as a starting clutch to transmit a torque from an output shaft of a driving engine of the motor vehicle to said automatically-shifted planetary transmission, wherein an existing friction clutch of the automatically-shifted planetary transmission is used as the starting clutch.
A method for transmitting torque in a motor vehicle having an automatically-shifted planetary transmission, comprising the step of arranging a friction clutch as a starting clutch between an output shaft of a driving engine of the motor vehicle and said automatically-shifted planetary transmission to transmit a torque therebetween, wherein an existing friction clutch of the automatically-shifted planetary transmission is used as the starting clutch.
An apparatus for transmitting torque in a motor vehicle including an automatically-shifted planetary transmission, further comprising:
- a friction clutch arranged as a starting clutch to transmit a torque from an output shaft of a driving engine of the motor vehicle to said automatically-shifted planetary transmission, said friction clutch being the sole torque transmission device between said output shaft and said automatically-shifted planetary transmission;
- and
- an automatic control unit which controls the torque transmission by way of the friction clutch, said automatic control unit controlling the torque transmission as a function of at least one of:
- (a) a load of the driving engine, (b) a rotational speed of the driving engine, (c) a rotational speed of an output shaft of the automatically-shifted planetary transmission, (d) an engaged drive position of a selector lever for the automatically-shifted planetary transmission, and (e) a signal of a brake switch.
A method for transmitting torque in a motor vehicle having an automatically-shifted planetary transmission, comprising the steps of:
- arranging a friction clutch as a starting clutch between an output shaft of a driving engine of the motor vehicle and said automatically-shifted planetary transmission to transmit a torque therebetween, said friction clutch being the sole torque transmission device arranged between said output shaft and said automatically-shifted planetary transmission;
- and
- automatically controlling the torque transmission by way of the friction clutch with an automatic control unit as a function of at least one of:
- (a) a load of the driving engine, (b) a rotational speed of the driving engine, (c) a rotational speed of an output shaft of the automatically-shifted planetary transmission 1, (d) an engaged drive position of a selector lever for the automatically-shifted planetary transmission, and (e) a signal of a brake switch.
Dependencies are inferred from the claim text.