公开(公告)号：US10889965B2

公开(公告)日：2021-01-12

申请号：US16436959

申请日：2019-06-11

Applicant: Caterpillar Inc.

Inventor： Travis Neale Richards ,  Ernest Everett Stoops ,  Michael Lemoyne Repscher ,  Matthew David Roley ,  Ramalho Stive ,  Michael Robert Kunde ,  Dwanz Mwalimu Mwasi ,  Charles Eric Nail ,  Bart Jerome Bradford

IPC: E02F9/22 ,  B62D12/00 ,  E02F9/08

Abstract: A hydraulic circuit for a pair of cylinders of an articulation system includes a pump, a reservoir, a directional control valve (DCV), a pair of actuator valves (AVs) and an articulation charge circuit (ACC). The DCV is fluidly coupled to the pump, the reservoir and the pair of cylinders via a supply line, a fluid return line and a pair of cylinder supply lines (CSLs) respectively. Each CSL has a load check valve (LCV) therein. The AVs are fluidly coupled with the DCV and the pump via a pilot supply line (PSL) for actuating movement of the DCV. The ACC, associated with the PSL and each cylinder supply line downstream of the associated LCV, charges a corresponding CSL with fluid from the PSL for increasing a pressure in the corresponding CSL when the pressure in the corresponding CSL falls below the pressure of fluid associated with the PSL.