| 摘要 |
PURPOSE: To prevent convergence of a change gear ratio in other change gear ratio than a target change gear ratio and the restarting of a change gear by correcting the neutral position of a spool valve. CONSTITUTION: When there is the error in a neutral position of a spool valve, when time calculation of the error of an actual change gear ratio based on a target change gear ratio is effected, an error calculation value is positive or negative value, and duty A and a duty B are corrected according to the magnitude of the value to output it to solenoid valves 13a and 13b. An error calculation value after correction approaches zero and through repetition of correction, the neutral position of a spool valve is corrected to a true neutral position. When a change gear ratio is fluctuated, a feedback gain outputted to solenoid valves 13a and 13b are also changed according to the magnitude of an error integration value and positive and negative code. |
