US 9,670,973 B2 · Method to control the torque transfer rate of a clutch, clutch control unit for a clutch and transmission with such a control unit

Abstract

The disclosure relates to a procedure for controlling torque transmission rate of a clutch. The clutch is in connection with a transmission and an electric machine, configured to receive torque from the electric machine by a couple half of the clutch, and configured to produce a torque guiding connection between a combustion engine and the transmission. According to the procedure, when the clutch is in a slipping condition, a shifting demand to the transmission to shift from a neutral position to a gear is detected. After detecting such a shifting demand, either a counter is started so that when the counter reaches a first count, the torque transmission rate of the clutch is being increased, or an event detection is actuated to detect an event that directly precedes the shifting process, so that when this event is detected, the torque transmission rate of the clutch is increased.

Claims20

Dependent claims

A procedure for controlling a torque transmission rate of a clutch by a clutch control unit, wherein the clutch is in connection with a transmission and an electric machine and wherein a coupling half of the clutch is configured to receive torque from the electric machine to transfer torque between a combustion engine and the transmission, the procedure comprising:

determining whether the clutch is in a slipping condition or a friction point;
and
when the clutch is in the slipping condition or the friction point, increasing, by the clutch control unit, the torque transmission rate of the clutch after detecting a shift demand for a shifting process to shift from a neutral position of the transmission to a target gear of a plurality of transmission gears,
wherein increasing the torque transmission rate after detecting the shifting demand results in a reduction of a retroactive effect on the slipping condition or the friction point during the shifting process.

1 more element

A device, comprising

a clutch control unit for controlling a torque transmission rate of a clutch, comprising:
at least one interface configured to communicate with further control units,
wherein the clutch is in connection with a transmission and an electric machine to receive torque from the electric machine and to transfer torque between a combustion engine and the transmission, wherein the clutch control unit is configured to:
determine whether the clutch is in a slipping condition or a friction point;
and
when the clutch is in the slipping condition or the friction point, increase the torque transmission rate of the clutch after detecting a shift demand for a shifting process to shift from a neutral position of the transmission to a target gear of a plurality of gears of the transmission,
wherein increasing the torque transmission rate after detecting the shift demand results in a reduction of a retroactive effect on the slipping condition or the friction point of the clutch during the shifting process.

4 more elements

Dependencies are inferred from the claim text.

Method to control the torque transfer rate of a clutch, clutch control unit for a clutch and transmission with such a control unit

Life of this patent

Method to control the torque transfer rate of a clutch, clutch control unit for a clutch and transmission with such a control unit

Life of this patent

Abstract

Claims20