Automatic clutch control system

A method for controlling a clutch actuator, to operate a clutch having a clutch stroke, in an automatic transmission system for automobiles, comprising the steps of:

• (a) detecting an accelerator position by an accelerator position sensor, an engine rotational speed by an engine speed sensor, a clutch stroke by a clutch stroke sensor provided on a clutch actuator, a change lever position by a lever position sensor, an input shaft rotational speed by an input shaft rotational speed sensor, and a transmission gear position by a transmission gear position sensor;
• (b) performing learning control with a microcomputer by
• (1) obtaining a full clutch engagement point in a clutch engagement operation based on a saturated clutch stroke signal and then obtaining a clutch contact point in a clutch engagement operation following a clutch disengagement operation and
• (2) judging an effective clutch operation range based on said full clutch engagement point and clutch contact point;
• and
• (c) controlling the clutch stroke based on said effective clutch operation range.

An apparatus, including a microcomputer, for controlling a clutch actuator, to operate a clutch having a clutch stroke, in an automatic transmission system for automobiles, comprising:

• means for detecting an accelerator position, an engine rotational speed, a clutch stroke, a change lever position, an input shaft rotational speed, and a transmission gear position;
• means for performing learning control, including
• means for obtaining a full clutch engagement point by a clutch engagement operation based on a saturated clutch stroke signal and then obtaining a clutch contact point by a clutch engagement operation following a clutch disengagement operation and
• means for judging an effective clutch operation range based on said full clutch engagement point and clutch contact point;
• and
• means for controlling a clutch stroke based on said effective clutch operation range.