公开(公告)号：US11430319B1

公开(公告)日：2022-08-30

申请号：US17489466

申请日：2021-09-29

Applicant: Caterpillar Inc.

Inventor： Nathan S Pauli ,  Pengfei Ma ,  Kalpeshkumar N. Patel ,  Richard Andrew Carpenter ,  James David Siegle ,  Vignesh Jayakumar ,  Richard Scott Cushing

IPC: G08B21/18

Abstract: Cavitation that occurs within a pump of a machine, such as truck or other work machine, can potentially damage the pump and/or other components of the machine. The machine can have a cavitation monitor configured to detect cavitation and/or cavitation damage associated with the pump based on vibration data, speed data associated with mechanical movements of the pump, and operating data associated with the machine overall. If the cavitation monitor detects cavitation and/or cavitation damage, the cavitation monitor can cause corresponding alerts to be displayed to a machine operator or other user.

公开(公告)号：US20160252429A1

公开(公告)日：2016-09-01

申请号：US15149260

申请日：2016-05-09

Applicant: Caterpillar Inc.

Inventor： Mary Louise Yeager ,  Alasdair Owen Lee ,  James David Siegle

IPC: G01M15/05 ,  G01M15/06 ,  G01M15/08 ,  F02D35/02

CPC classification number: F02D35/023 ,  F02D41/009 ,  F02D41/2474 ,  F02D2250/14

Abstract: A pressure measurement system for an engine is illustrated. The pressure measurement system includes a pressure sensor configured to generate a signal indicative of a pressure within a cylinder and an angle sensor configured to generate a signal indicative of an angular position of a crankshaft of the engine. The pressure measurement system further includes a controller coupled to the pressure sensor and the angle sensor. The controller is configured to determine a volume of the cylinder based on the signal indicative of the angular position of the crankshaft. The controller is configured to determine a first pressure offset during a compression stroke of the engine and a second pressure offset during an expansion stroke of the engine. The controller is further configured to determine a corrected pressure value by any one of the first pressure offset and the second pressure offset based on the angular position of the crankshaft.

Abstract translation: 示出了用于发动机的压力测量系统。 压力测量系统包括压力传感器，其被配置为产生指示气缸内的压力的信号，以及角度传感器，其被配置为产生指示发动机曲轴的角位置的信号。 压力测量系统还包括耦合到压力传感器和角度传感器的控制器。 控制器被配置为基于指示曲轴的角位置的信号来确定气缸的体积。 控制器被配置成在发动机的压缩冲程期间确定第一压力偏移和在发动机的膨胀冲程期间的第二压力偏移。 控制器还被配置为基于曲轴的角位置来确定第一压力偏移和第二压力偏移中的任何一个的校正压力值。