Clutch control system

A vehicle electronic control system for a rotary transmission clutch and which includes:

• a reference signal generator;
• a clutch position signal generator means which is response to vehicle operating parameters, means for deviving an error signal from an output of the reference signal generator and an ouput of the clutch position signal generator and;
• an inverting integrator which receives the error signal and the output of which forms a command signal which dictates the state of engagement of the clutch;
• a clutch actuator for operation of the clutch;
• a clutch actuator control means responsive to the command signal and which controls the operation of the actuator and which includes a comparator responsive to the command signal and a transducer responsive to the position of the clutch and which produces a feedback signal which is fed into the comparator for comparison with the command signal;
• and
• a wear compensator means that modifies the feedback signal to alter said feedback signal as the clutch wears, the wear compensator means comprising a first detect means connected to the integrator input for sensing a given error signal voltage and which produces an output signal for control of a first AND gate, a second detect means connected to the integrator output for sensing when the command signal has passed a threshold value and which also produces an output signal for command of the first AND gate, and a wear signal generator means controlled by the first AND gate for producing a wear signal, said wear signal being summed with the feedback signal.