Patent ID: 9188114
Filing Date: 2015-11-17
Classification: F04B,F15B

Abstract:
1. A hydraulic system comprising a hydraulic high pressure pump, a hydraulic charging pump, and at least first and second hydraulic consumers, wherein an output flow of said hydraulic high pressure pump passes through the first hydraulic consumer, wherein an output hydraulic fluid flow of said hydraulic charging pump passes through the second hydraulic consumer and is then combined with the output flow of the hydraulic high pressure pump after it passes through the first hydraulic consumer, the combined flow being used as an input hydraulic fluid flow of said hydraulic high pressure pump, wherein the system is adapted to feed the second hydraulic consumer from a combination of the output flows of at least a second hydraulic high pressure pump and the hydraulic charging pump, wherein a maximum flow of said output fluid flow of said hydraulic charging pump is at least 50 percent of a maximum flow rate of said input fluid flow of said hydraulic high pressure pump, and wherein the hydraulic high pressure pump is a synthetically commutated hydraulic pump having at least one actively controllable fluid inlet or outlet valve.