| 摘要 |
PURPOSE:To carry out proper speed change control by carrying out shift-up judgment at the time when a throttle opening returning amount after it is judged to be in the normal state comes to be higher than a set value, and changing the set value of the throttle opening returning amount in accordance with a car load. CONSTITUTION:A control unit 8 sets a target throttle opening on the basis of an actual car speed and others, and drives a throttle valve actuator 4 by an automatic speed control means 8A. And, an automatic speed change gear 5 is controlled by a speed change control means 8B on the basis of the actual car speed, throttle opening and others. Furthermore, at the time of a car entering an uphill road, shift-down of the automatic speed change gear 5 is judged by a 4 3 judge means 8C. Subsequently, at the time of the car emerging from the uphill road, shift-up of the automatic speed change gear 5 is judged by a 3 4 judge means 8D. Then, the set value of the throttle opening returning amount to carry out shift-up judgment is changed in accordance with a car load. Consequently, it is possible always to carry out shift-up of the automatic speed change gear most properly. |
