electrical control unit for controlling a ventilanordnung in a speisekreis comprising hydraulic actuators with one from a neutral position in both directions adjustable device, particularly a steerable speisepumpe and / or a hydraulikmotors with variable displacement

摘要

The hydrostatic transmission control system includes a first and second two-position solenoid valve which function to alter the hydraulic fluid parameters as delivered to the servo control cylinders of a variable displacement pump associated with a hydrostatic transmission. Activation of the first solenoid valve instigates a varying of pump displacement. Once the desired pump displacement has been achieved, the second solenoid valve is activated to maintain the desired pump displacement. The deactivation of both solenoid valves results in the hydrostatic transmission seeking and maintaining a neutral mode.