| 摘要 |
PURPOSE:To obtain a travel controller, equipped with a frequency sensing means for sensing the practice of decelerating operation with an actuator prescribed times or more and capable of making the actuator perform accelerating operation interlocking with the sensing and preventing a hunting phenomenon from occurring. CONSTITUTION:An infinite variable speed device 2 interposingly installed in a machine body travel driving system is constructed so as to enable speed changing operation by driving with an actuator 10. The travel controller is equipped with a controlling means for performing control so as to make the set value of a speed setter (PM2) coincide with the speed provided with the actuator 10 and an automatic speed change controlling means (A) for making the actuator perform decelerating operation to the low speed side when the speed of the engine 1 is reduced to the first set value or below and making the actuator perform accelerating operation to the high speed side when the engine speed is returned to the second set value higher than that of the first set value. When a decelerating operation frequency sensing means (B) for sensing the practice of the decelerating operation with the actuator 10 prescribed times or more becomes in a sensing state, the actuator 10 is made to perform the accelerating operation to a lower changed speed than that of the set speed fixed with the speed setter (PM2). |
