公开(公告)号：US20170198831A1

公开(公告)日：2017-07-13

申请号：US14992452

申请日：2016-01-11

Applicant: Caterpillar Inc.

Inventor： Matthew Beschorner ,  Naoto Funabiki ,  Brett Janson

IPC: F16K37/00 ,  G01M3/28 ,  F16K17/02

CPC classification number: G01M3/2876 ,  E02F9/2203 ,  F15B19/00 ,  F15B20/005 ,  F15B2211/50518 ,  F15B2211/50536 ,  F15B2211/5157 ,  F15B2211/5159 ,  F15B2211/526 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/665 ,  F15B2211/855

Abstract: A system for monitoring performance of a relief valve in a hydraulic system having a hydraulic actuator includes a supply discharge line fluidly coupled between a source of pressurized fluid and a fluid chamber of the actuator. The supply discharge line has a supply valve disposed therein. The system also includes a main relief line and a line relief line fluidly coupled to the supply discharge line. The main relief line includes a main relief valve and is disposed upstream of the supply valve while the line relief line includes a line relief valve and is disposed downstream of the supply valve. The line relief valve is configured to open at a pressure value greater than that used in the main relief valve. A controller compares fluid pressures in the main relief line and the line relief line to determine if the line relief valve is leaking.

公开(公告)号：US12209859B2

公开(公告)日：2025-01-28

申请号：US17952431

申请日：2022-09-26

Applicant: Caterpillar Inc.

Inventor： Brett Janson ,  Dhanabalan Raman

IPC: G01D5/14 ,  E02F9/26 ,  G01B7/30 ,  G01D5/16 ,  E02F9/12

Abstract: An angular position sensor is disclosed. The angular position sensor has a cylindrical magnet holder that has a base portion attached to a top surface of a shaft and a magnet holding portion extending from the base portion. A magnetic coding is arranged on the outer surface of the magnet holding portion that establishes a magnetic field. A sensor base encircles the base portion of the magnet holder and supports magnetic field sensors that are fixed on an arc-segment. The arc-segments partially overlap so that output signals of the magnetic field sensors are indicative of the angular portion of the sensor base relative to the shaft.

公开(公告)号：US20160003267A1

公开(公告)日：2016-01-07

申请号：US14321047

申请日：2014-07-01

Applicant: Caterpillar Inc.

Inventor： Matthew Beschorner ,  Brett Janson ,  Anthony Sanders

IPC: F15B13/02 ,  E02F3/30 ,  E02F3/42 ,  F15B1/26 ,  F15B15/14

CPC classification number: E02F3/30 ,  E02F3/425 ,  F15B11/028 ,  F15B2211/30575 ,  F15B2211/365 ,  F15B2211/50518 ,  F15B2211/5157 ,  F15B2211/5159 ,  F15B2211/55 ,  F15B2211/6309 ,  F15B2211/6313

Abstract: A hydraulic system includes one or more sensors configured to measure a pressure at least one input or end of a hydraulic actuation device, such as a cylinder for example. A control module can be operatively coupled to the sensors and at least one metering valve. The control module can selectively open the metering valve when the pressure at one of the ends of the cylinder reaches a first pressure threshold to control the force on the cylinder rod, to permit flow from the end of the cylinder to the tank.

Abstract translation: 液压系统包括一个或多个传感器，其配置成测量例如液压致动装置（例如气缸）的至少一个输入或端部的压力。 控制模块可以可操作地耦合到传感器和至少一个计量阀。 当气缸的一端处的压力达到第一压力阈值时，控制模块可以选择性地打开计量阀，以控制气缸杆上的力，以允许从气缸的端部流向罐。