Method of operating a drive train of a motor vehicle and corresponding drive train
AssigneeMAGNA Powertrain AG & Co KG
InventorsDaniel Prix, Rene Scheucher
Life of this patent
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Abstract
A method for selectively coupling a motor to a drive train of a motor vehicle using a clutch having a first clutch part driven by the motor, a second clutch part associated with the drive train and an actuator, the method includes the steps of: accelerating the first clutch part while simultaneously activating the actuator during a first actuation phase without engaging the first and second clutch parts; suspending activation of the actuator until a predefined rotational speed difference is reached between the first and second clutch parts; and engaging the first and second clutch parts during a second actuation phase upon reaching the predefined speed difference.
Claims13
A method of operating a drive train of a motor vehicle having a motor selectively coupled to the drive train by a clutch that is actuable by an actuator, the clutch including a first clutch part associated with a drive shaft of the motor and a second clutch part associated with the drive train, with an engagement of the clutch comprising the steps of:
- accelerating the first clutch part by the motor to reduce a rotational speed difference between the first clutch and the second clutch part with a simultaneous activation of the actuator during a first actuation phase to overcome a dead space of the clutch, wherein the first and second clutch parts are not engaged during the first actuation phase;
- suspending the activation of the actuator after overcoming the dead space and before bringing the first and second clutch parts into engagement until a predefined rotational speed difference is reached;
- activating the actuator again during a second actuation phase to bring the first and second clutch parts into engagement when the predefined rotational speed difference is reached or is fallen below.
A drive train of a motor vehicle comprising:
- a motor selectively coupled to the drive train by a clutch that is actuatable by an actuator, the clutch having a first clutch part associated with a drive shaft of the motor and a second clutch part associated with the drive train;
- a motor control unit associated with the motor;
- and
- an actuator control unit associated with the actuator;
- wherein the motor control unit is operable to instruct the motor to accelerate the first clutch part to reduce a rotational speed difference between the first clutch part and the second clutch part while the actuator control unit is operable to simultaneously activate th actuator during a first actuation phase to overcome a dead space of the clutch, the first and second clutch parts not being engaged during the first actuation phase;
- the actuator control unit is operable to suspend activation of the actuator after overcoming the dead space and before bringing the first and second clutch parts into engagement as long as a predefined rotational speed difference has been reached or is fallen below.
Dependencies are inferred from the claim text.