公开(公告)号：US10323384B2

公开(公告)日：2019-06-18

申请号：US15373074

申请日：2016-12-08

Applicant: Caterpillar Inc.

Inventor： Vickram Murugesan ,  Hongliu Du ,  Lonnie James Devier ,  Frank Breier ,  Mandi Henderson ,  Matthew James Beschorner

IPC: E02F3/28 ,  E02F9/08 ,  E02F9/22 ,  F15B1/26 ,  F15B11/08 ,  F15B13/04

Abstract: A ride control system includes four independent metering valves (IMVs) that are independently and selectively controlled by a controller for attenuating oscillations in a hydraulic actuator of a machine. The controller is configured to open at least one of the IMVs for supplying pressurized fluid from a tank to a head end chamber of the hydraulic actuator when a pressure of the head end chamber drops to a value less than an initially registered pressure. Additionally, when the displacement of the piston block is positive and the pressure in the head end chamber falls to a value less than the pressure of fluid in a rod end chamber of the hydraulic actuator, the controller may also open another one of the IMVs by which fluid from the rod end chamber could be supplied to the head end chamber for supplementing pump flow and attenuating oscillations in the hydraulic actuator.

公开(公告)号：US20180163373A1

公开(公告)日：2018-06-14

申请号：US15373074

申请日：2016-12-08

Applicant: Caterpillar Inc.

Inventor： Vickram Murugesan ,  Hongliu Du ,  Lonnie James Devier ,  Frank Breier ,  Mandi Henderson ,  Matthew James Beschorner

IPC: E02F9/22 ,  E02F9/08 ,  F15B1/26 ,  F15B11/08 ,  F15B13/04

CPC classification number: E02F9/2207 ,  E02F3/283 ,  E02F9/0883 ,  E02F9/2228 ,  E02F9/2296 ,  F15B1/26 ,  F15B11/08 ,  F15B13/0401 ,  F15B2211/20546 ,  F15B2211/7051

Abstract: A ride control system includes four independent metering valves (IMVs) that are independently and selectively controlled by a controller for attenuating oscillations in a hydraulic actuator of a machine. The controller is configured to open at least one of the IMVs for supplying pressurized fluid from a tank to a head end chamber of the hydraulic actuator when a pressure of the head end chamber drops to a value less than an initially registered pressure. Additionally, when the displacement of the piston block is positive and the pressure in the head end chamber falls to a value less than the pressure of fluid in a rod end chamber of the hydraulic actuator, the controller may also open another one of the IMVs by which fluid from the rod end chamber could be supplied to the head end chamber for supplementing pump flow and attenuating oscillations in the hydraulic actuator.