| 摘要 |
<p>An industrial vehicle, particularly an excavator or the like, comprising a ground-wheel supported frame, at least one hydraulic pump driven by a combustion engine equipped with a control-mechanism for fuel supply and a hydraulic motor to be driven with the aid of the hydraulic pump, said motor being coupled through a transmission mechanism with drivable ground wheels, said transmission mechanism being settable in a first position for a low speed run and in a second position for a high speed run of the vehicle, whilst between the hydraulic pump and the hydraulic motor a three-position valve is arranged for interrupting the fluid supply to the hydraulic motor and for inverting the direction of rotation of the hydraulic motor, the pump and the motor being of the self-setting type so that they set themselves in dependence on the power fed to the hydraulic pump and on the power absorbed at the hydraulic motor, whereby means are provided with the aid of which at setting to high speed travel the three-position valve arranged between the hydraulic pump and the hydraulic motor is set in the fully open position for a forward drive whilst with the aid of a control-member the supply of pressurized fluid to a setting member regulating the control-mechanism of the fuel supply to the combustion engine can be controlled.</p> |
