Hydraulic control device for gear mechanism of vehicle, has control valve connected with gear pump to adjust control pressure of control unit, where valve mechanism, hydraulic line and control unit are formed in pressure-tight manner

摘要

The device has a pressure control valve (10) connected with a gear pump (6) to adjust a control pressure of a control unit (11). An adjustable control valve mechanism is provided between the valve and the control unit to open or close a hydraulic line (L2). The control valve mechanism, the line and the control unit are formed in a pressure-tight manner, and the hydraulic pressure is maintained above a level for a predefined time period. The hydraulic pressure rises depending on the control pressure, and the control unit (11) has a filling level greater than a predefined threshold value.