SPEED CHANGE RATIO CONTROL SYSTEM FOR CONTINUOUSLY VARIABLE TRANSMISSION

摘要

PROBLEM TO BE SOLVED: To prevent delay of change gear ratio response when mechanical stationary deviation is generated. SOLUTION: This system is provided with a change gear ratio command value operating means to operate a change gear ratio command value to let a real change gear ratio follow a change gear ratio to reach determined in accordance with operation conditions in specified dynamic characteristics; a target change gear ratio operating means to operate the change gear ratio when the real change gear ratio follows it as targeted based on the change gear ratio to reach and time constant representing the specified dynamic characteristics; a change gear ratio command value correcting quantity operating means to operate an integrated correction quantity to the change gear ratio command value based on an integrated value of deviation between the target change gear ratio and the real change gear ratio; a change gear ratio command value correcting means to correct the change gear ratio command value based on the correction quantity; and an actuator drive control means to control driving of an actuator 2 of a speed change control mechanism of a continuously variable transmission based on the change gear ratio command value after correction. It is also provided with an action stopping means to stop action of the change gear ratio command value correction quantity operation means when an integrated part of the correction quantity exceeds a specified threshold value.