公开(公告)号：US20150000756A1

公开(公告)日：2015-01-01

申请号：US14486304

申请日：2014-09-15

Applicant: Caterpillar Inc.

Inventor： Dayao Chen ,  Pengfei Ma ,  Tonglin Shang ,  Bryan J. Hillman

IPC: F15B1/08 ,  F15B19/00

CPC classification number: F15B1/08 ,  F15B19/005 ,  F15B2201/205 ,  F15B2201/51 ,  G01M3/02 ,  G01N3/32 ,  Y10T137/0396 ,  Y10T137/86389

Abstract: A system including a hydraulic accumulator, a pressure sensor, a fluid source and a data processor to detect a pre-charge pressure is provided. The hydraulic accumulator includes first and second fluid chambers and a separator therebetween. The hydraulic accumulator has an associated pre-charge pressure. The pressure sensor is connected to the first fluid chamber. The data processor is connected to the pressure sensor. The data processor is configured to determine a first and second rate of pressure changes, and a transition pressure between the first and second rates. The approximate pre-charge pressure is determined based on the transition pressure.

Abstract translation: 提供一种包括液压蓄能器，压力传感器，流体源和数据处理器以检测预充气压力的系统。 液压蓄能器包括第一和第二流体室和它们之间的分离器。 液压蓄能器具有相关的预充压力。 压力传感器连接到第一流体室。 数据处理器连接到压力传感器。 数据处理器被配置为确定压力变化的第一和第二速率以及第一和第二速率之间的过渡压力。 基于过渡压力确定近似预充压力。