| 摘要 |
PURPOSE:To enable reliable stop of a vehicle, by a method wherein a hydraulic pump is controlled so that the number of revolutions of a hydraulic motor is regulated to about zero, and the vehicle is braked through operation of a brake. CONSTITUTION:When a change lever neutral single from a detector 13 is inputted to a theoretical circuit 28, the circuit 28 computes a means speed V from a signal for the number of revolutions of an engine from a detector 15, signals for the number of revolutions of motors on both sides from detectors 16 and 17, and a speed stage signal from one of hydraulic switches 18-21, and the speed V is compared with a set car speed Vc. Since neutral control is effected in the case of V<Vc, the circuit 28 determines all signals to change-over switches 22-25 into zero to disconnect each of clutches G-J. Simultaneously, signals (i) and (j) to discharge control actuators 26 and 27 of hydraulic pumps 6 and 7 on both sides, to which a stop signal, determining so that signals for the number of revolutions of motors on both sides are adjusted to about zero, are transmitted. Thus, the number of revolutions of each of the motors 8 and 9 is adjusted to about zero, and simultaneously, brake signals (p) and (q) are outputted to solenoids 29 and 30 to actuate a brake. |
