Hydraulic dual-circuit system e.g. for crawler-track appliances, has pressure device supplied via summation valve arrangement over summation line downstream from orifice plate and pressure maintaining valve

摘要

A hydraulic dual-circuit system for controlling consumer loads of a mobile appliance, in which each hydraulic circuit (2,4) is provided with an adjustment pump (6,7) depending on the highest load pressure and via which the associated load can be supplied with pressure and in which the two circuits (2,4) are interconnected via a summation valve arrangement (12), which is used to feed the pressure from one of the connected circuits via a summation line (24) downstream from the orifice plate (14) and from the pressure maintaining valve (16) of the summed consumer load.