DISPLACEMENT-CONTROLLED HYDRAULIC SYSTEM FOR MULTI-FUNCTION MACHINES

摘要

A displacement-controlled hydraulic system for installation on a multi-function machine (100), and multi-function machines (100) equipped with the hydraulic system and having devices (103) for propelling the machine (100), at least a first implement (104-108), and multiple actuators (20-28) that perform multiple functions of the machine (100). The multiple actuators (20-28) include first actuators (20-25) that control the first implement (104-108) and second actuators (26,27) that control the propelling devices (103). The hydraulic system comprises multiple pumps (14-19) for controlling the first actuators (20-25) and optionally the second actuators (26,27), and valves (29-32) that enable at least one of the pumps (14-16,19) to sequentially control two of the multiple actuators (20-25,28) and a corresponding two functions of the multiple functions performed thereby. None of the pumps (14-19) sequentially controls the second actuators (26,27) in combination with any of the first actuators (20-25).