Method of Controlling a Double Clutch in a Vehicle Transmission, and Clutch Control System for Controlling a Double Clutch
AssigneeHOERBIGER Drivetrain Mechatronics B.V.B.A.
InventorNico DE VISSCHER
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Abstract
The present invention concerns a method of controlling a double clutch transmission (1) comprising two clutches (2a, 2b) one of which that is transmitting torque being the active clutch whilst the other one constituting the incoming clutch characterized by combining the incoming clutch preparation and the torque handover from the active clutch by over actuating the incoming clutch and shutting off the active clutch in a non proportional way, based on a feedback signal from the incoming clutch.
Claims20
A method of transferring torque from an active clutch to an incoming clutch in a double clutch transmission, the method comprising:
- preparing the incoming clutch so as to be ready for taking over the torque transmission from the active clutch, wherein the preparation is achieved by over actuating the incoming clutch;
- maintaining the over actuation of the incoming clutch before a touch point for engaging the incoming clutch is reached;
- receiving a feedback signal which indicates that all of the torque transmission has been transferred to the incoming clutch from the active clutch while the incoming clutch is over actuated;
- and
- shutting off the active clutch based, at least in part, on receiving the feedback signal.
A clutch control system for transferring torque, the system comprising:
- a first actuation device configured to actuate an active clutch;
- a second actuation device configured to actuate an incoming clutch;
- and
- a transmission control unit (TCU) configured to:
- over actuate the incoming clutch, via the second actuation device, in preparation for transferring torque from the active clutch to the incoming clutch;
- maintain the over actuation of the incoming clutch before a touch point for engaging the incoming clutch is reached;
- and
- shut off, via the first actuation device, the active clutch based, at least in part, on a feedback signal which indicates that all of the torque transmission has been transferred to the incoming clutch from the active clutch while the incoming clutch is over actuated.
The clutch control system of claim 9, wherein the first actuation device further comprises a first proportional actuator, wherein the first proportional actuator controls an amount of actuation of the active clutch when the first non-proportional valve is on, wherein the second actuation device further comprises a second proportional actuator, and wherein the second proportional actuator controls the amount of actuation of the incoming clutch when the second non-proportional valve is on.
An apparatus for transferring torque from an active clutch to an incoming clutch in a double clutch transmission, the apparatus comprising:
- means for over actuating the incoming clutch in preparation for transferring torque from the active clutch to the incoming clutch, wherein the over actuation of the incoming clutch is maintained before a touch point for engaging the incoming clutch is reached;
- and
- means for shutting of the active clutch based, at least in part, on a feedback signal which indicates that all of the torque transmission has been transferred to the incoming clutch from the active clutch while the incoming clutch is over actuated.
The method according to claim 17, wherein the amount of current applied to the hydraulic valve is reduced to a second amount of current that is greater than or equal to an amount of current associated with transferring all of the engine torque to the incoming clutch.
Dependencies are inferred from the claim text.