Method of controlling a motor-driven clutch
AssigneeValeo
InventorsPierre Grunberg, Jean-Claude Mouza, Patrice Bertin
Life of this patent
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Abstract
The invention provides a method for controlling a clutch fitted with motorized actuation by means of a pulse-fed direct-current electric motor. According to the invention, the control system of the electric motor comprises a microcomputer associated with a memory, in which values defining the duration of the control pulses of the clutch are stored, and these values can be updated during the operating life to take into account ageing and wear. The invention is particularly suitable for automatic clutch control in an automobile.
Claims11
A method of controlling a clutch having motorized actuation by means of a pulse-fed direct current motor coupled to an actuator, said method comprising the steps of:
- First, establishing a number of elementary movements which define a forward and a return stroke of the actuator;
- Second, supplying the motor with a current pulse of a predetermined duration which is assigned to each elementary movement;
- Third, storing the predetermined durations for each elementary movement in a memory;
- Fourth, reading a sequence of the predetermined durations in preparing the feed-current pulses of the motor;
- Fifth, measuring the position of the actuator after completion of one of the elementary movements or a group of the elementary movements and after application of the corresponding number of pulses required by the predetermined stored durations;
- and Sixth, correcting one or more of the predetermined stored durations in response to the deviation between a prescribed position and the measured position of the actuator.
Dependencies are inferred from the claim text.