公开(公告)号：US20180346017A1

公开(公告)日：2018-12-06

申请号：US15613684

申请日：2017-06-05

Applicant: Caterpillar Inc.

Inventor： Gang Wen ,  Travis Neale Richards ,  Matthew David Roley ,  Nathanael Garnet McRostie ,  Dwanz Mwalimu Mwasi

IPC: B62D5/09 ,  B62D5/06

CPC classification number: B62D5/09 ,  B62D5/062 ,  B62D5/30

Abstract: A hydraulic system is provided for a steering system of a vehicle. The hydraulic system includes a pump that supplies pressurized fluid during an operation of the steering system. The hydraulic system also includes an accumulator that is in independent and selective communication with each of the pump and the steering system. When the pump is in the operational state to support the operation of the steering system, some of the fluid may be routed into the accumulator and stored in the accumulator for later use. In the event of failure of the pump when the steering system is in operation, the accumulator provides the required amount of fluid to continue operation of the steering system until charge in the accumulator depletes to a value that is no longer sufficient to support operation of the steering system.

公开(公告)号：US10144450B1

公开(公告)日：2018-12-04

申请号：US15613684

申请日：2017-06-05

Applicant: Caterpillar Inc.

Inventor： Gang Wen ,  Travis Neale Richards ,  Matthew David Roley ,  Nathanael Garnet McRostie ,  Dwanz Mwalimu Mwasi

IPC: B62D5/30 ,  B62D5/09 ,  B62D5/06

CPC classification number: B62D5/09 ,  B62D5/062 ,  B62D5/30

Abstract: A hydraulic system is provided for a steering system of a vehicle. The hydraulic system includes a pump that supplies pressurized fluid during an operation of the steering system. The hydraulic system also includes an accumulator that is in independent and selective communication with each of the pump and the steering system. When the pump is in the operational state to support the operation of the steering system, some of the fluid may be routed into the accumulator and stored in the accumulator for later use. In the event of failure of the pump when the steering system is in operation, the accumulator provides the required amount of fluid to continue operation of the steering system until charge in the accumulator depletes to a value that is no longer sufficient to support operation of the steering system.

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.