| 摘要 |
PROBLEM TO BE SOLVED: To correct the output of an inclination sensor according to an aging detection error by determining a neutral position return, updating a correction amount, and performing correction based on the correction amount with the detection value of a swash inclining angle updated at the time of operating a servo actuator. SOLUTION: A controller 10 computes a target swash inclination angle according to the depressing amount of an accelerator pedal or the like, and controls the vehicle speed by adjusting the operating amount of a servo actuator so as to make a swash inclination angle detected by an inclination sensor 11 approach the target swash inclination angle. That is, the solenoid current driving a proportional solenoid valve 34 is shut down, and a neutral position return timing for returning the servo actuator to its neutral position by the energizing force of a return spring is determined. The swash inclination angle which the inclination sensor 11 detects is updated as a correction amount at the time of returning to its neutral position, and the detection value of the swash inclination angle is corrected through the updated correction amount. It is thus possible to maintain detecting precision and control speed ratio exactly.
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