HYDRAULIC SYSTEM OF A TRANSMISSION WITH A PLURALITY OF PRESSURE REGULATING VALVES

摘要

A hydraulic system (1) of a transmission (2) with a multiple number of pressure control valves (62 to 29) is described, in the area of which an applied pressure (p_sys) can be adjusted to a pressure level to be set downstream as a function of a total force component acting on a valve slide depending on the operating state. The total force component is adjusted as a function of a pilot force component that can be applied to the valve slide, an actuating force component and a control force component that exists as a function of the pressure level prevailing downstream. The pilot force component and the actuating force component can each be applied with equal effect in the direction of a first end position of the valve slide of a pressure control valve (62 to 29) on the valve slide, in which the area upstream of the pressure control valve (62 to 29) is connected to the area downstream of the pressure control valve (62 to 29) by means of the pressure control valve, while the pressure downstream of the pressure control valve (62 to 29) of the pilot force component and the actuating force component can be applied with counteracting effect and in the direction of a second end position of the valve slide on the valve slide, in which the area downstream of the pressure control valve (62 to 29) is connected to a low-pressure area (71).