公开(公告)号：US11268411B2

公开(公告)日：2022-03-08

申请号：US16894357

申请日：2020-06-05

Applicant: Caterpillar Inc.

Inventor： Yifeng Lu ,  Yanchai Zhang ,  Zhaoxu Dong ,  Nathan S. Pauli ,  Xuefei Hu ,  Purna C. Nalla ,  Brian W. Young ,  James D. Siegle

IPC: F01L1/22 ,  F02B77/08 ,  G07C5/08 ,  G07C5/00

Abstract: A method for adjusting a valve lash in an internal combustion engine includes receiving a first signal generated by a sensor secured to the internal combustion engine, the first signal being indicative of a closing of a valve, receiving a second signal indicative of at least one of an engine speed of the internal combustion engine or a position of a camshaft of the internal combustion engine, and automatically determining an adjusted amount of lash associated with the valve based on the received first signal and the received second signal. The method also includes comparing the adjusted amount of lash to at least one predetermined threshold, and providing, in response to determining that the adjusted amount of lash is greater than the at least one predetermined threshold, a valve lash re-adjustment notification.

公开(公告)号：US20210381401A1

公开(公告)日：2021-12-09

申请号：US16894357

申请日：2020-06-05

Applicant: Caterpillar Inc.

Inventor： Yifeng Lu ,  Yanchai Zhang ,  Zhaoxu Dong ,  Nathan S. Pauli ,  Xuefei Hu ,  Purna C. Nalla ,  Brian W. Young ,  James D. Siegle

IPC: F01L1/22 ,  G07C5/00 ,  G07C5/08 ,  F02B77/08

Abstract: A method for adjusting a valve lash in an internal combustion engine includes receiving a first signal generated by a sensor secured to the internal combustion engine, the first signal being indicative of a closing of a valve, receiving a second signal indicative of at least one of an engine speed of the internal combustion engine or a position of a camshaft of the internal combustion engine, and automatically determining an adjusted amount of lash associated with the valve based on the received first signal and the received second signal. The method also includes comparing the adjusted amount of lash to at least one predetermined threshold, and providing, in response to determining that the adjusted amount of lash is greater than the at least one predetermined threshold, a valve lash re-adjustment notification.

公开(公告)号：US10563545B2

公开(公告)日：2020-02-18

申请号：US15952578

申请日：2018-04-13

Applicant: Caterpillar Inc.

Inventor： Yanchai Zhang ,  Zhaoxu Dong ,  Arun Rajendran ,  Yifeng Lu ,  Xuefei Hu ,  Lidi Chen ,  Rodney D. Harms

IPC: F01L1/34 ,  F01L1/24 ,  F02D41/00 ,  G07C5/08 ,  F02D41/24 ,  G07C5/00

Abstract: Some examples described herein may involve determining an advance timing window between the valve opening or closing and a designated time that the valve is scheduled to open or close; determining a closing velocity of the valve; monitoring an engine speed of the engine; determining valve lash information based on the advance timing window, the closing velocity, and the engine speed, wherein the valve lash information identifies a magnitude of the valve lash or whether the magnitude of the valve lash associated with the valve satisfies a threshold; and performing an action based on the valve lash information.

公开(公告)号：US10134257B2

公开(公告)日：2018-11-20

申请号：US15229673

申请日：2016-08-05

Applicant: Caterpillar Inc.

Inventor： Yanchai Zhang ,  Zhaoxu Dong ,  Xuefei Hu

IPC: F04B11/00 ,  G08B21/18 ,  E21B43/267 ,  F04B17/05 ,  F04B49/06 ,  F04B49/10 ,  F04B51/00 ,  F04B53/14 ,  F04B53/16 ,  F04B53/22

Abstract: Operating a pumping system includes moving a pumping element to transition liquid through the pump, and determining a value based at least in part upon inlet pressure and pumping speed that is indicative of a pressure of the liquid within a bore susceptible to cavitation. Pumping speed and/or inlet pressure can be varied responsive to the determined value to limit cavitation.

公开(公告)号：US20210270261A1

公开(公告)日：2021-09-02

申请号：US16802949

申请日：2020-02-27

Applicant: Caterpillar Inc.

Inventor： Yanchai Zhang ,  Zhijun Cai ,  Nathan S. Pauli ,  Zhaoxu Dong ,  Yong Sun ,  Xuefei Hu

IPC: F04B51/00 ,  E21B43/26 ,  F04B53/18 ,  F04B47/02

Abstract: A hydraulic fracturing machine includes a pump failure detection system. The hydraulic fracturing machine includes a hydraulic fracturing pump with a power end and a fluid end. The power end includes a plurality of roller bearings, and the fluid end includes a flow of fluid. A particle sensor coupled to the power end is configured to transmit particle information regarding a quantity of particles in the fluid. A temperature sensor, also coupled to the power end, is configured to transmit temperature information regarding a temperature of the fluid. A vibration sensor coupled to the power end is configured to transmit vibration information regarding a vibration of each of the plurality of roller bearings. An electronic control module analyzes the particle information, the temperature information and the vibration information, and calculates a failure warning level based on the analysis.

公开(公告)号：US20190353557A1

公开(公告)日：2019-11-21

申请号：US15984539

申请日：2018-05-21

Applicant: Caterpillar Inc.

Inventor： Yanchai Zhang ,  Yong Sun ,  Mingang Wang ,  Xuefei Hu ,  Zhaoxu Dong ,  Chunhui Pan

IPC: G01M13/04 ,  E21B43/26 ,  G01M13/02

Abstract: A rig management system is disclosed. The rig management system may be configured to receive vibration data from a set of sensors installed on one or more elements of a hydraulic fracturing rig. The rig management system may be configured to perform a first processing of the vibration data utilizing a moving window technique to identify a possible failure of a set of bearings. The rig management system may be configured to perform a second processing utilizing a set of processing techniques after identifying the possible failure of the set of bearings. The rig management system may be configured to determine that the possible failure is an actual failure based on a result of performing the second processing. The rig management system may be configured to perform an action after determing that the possible failure is the actual failure.

公开(公告)号：US20190195292A1

公开(公告)日：2019-06-27

申请号：US15852292

申请日：2017-12-22

Applicant: Caterpillar Inc.

Inventor： Chunhui Pan ,  James Grant Cotner ,  Xuefei Hu ,  Zhaoxu Dong ,  Yong Sun ,  Yanchai Zhang

IPC: F16D13/02

CPC classification number: F16D13/02 ,  F16D2300/02 ,  F16D2300/18 ,  F16D2500/1021 ,  F16D2500/1081 ,  F16D2500/5102 ,  F16D2500/70424 ,  F16D2500/7043 ,  F16D2500/70474

Abstract: Methods and apparatus for predicting clutch local peak temperatures in real time and controlling engagement of a friction clutch are disclosed. The clutch local peak temperature prediction can take into account machine operating parameters such as clutch control current, clutch shaft speed and clutch load to determine clutch local peak temperatures at hot spots within the friction clutch. A thermal-mechanical finite element analysis model may be developed for the friction clutch and used to generate a surrogate model of the friction clutch that can be used by an electronic control module of the machine to predict the local peak temperature of the friction clutch in real time and control engagement and disengagement of the friction clutch to maintain the local peak temperature below a critical peak temperature above which damage to the components of the friction clutch may occur.

公开(公告)号：US20190033843A1

公开(公告)日：2019-01-31

申请号：US15660014

申请日：2017-07-26

Applicant: Caterpillar Inc.

Inventor： Yanchai Zhang ,  Maurice Dust ,  Perry D Converse ,  Xuefei Hu ,  Zhaoxu Dong ,  Yong Sun

IPC: G05B23/02 ,  G01N29/12 ,  G01N29/44 ,  G01M1/14 ,  H02K7/18 ,  H02K11/20

Abstract: A system for detecting an abnormal operating condition of a component of a genset power system, which includes an engine drivingly coupled to a generator, is provided. The system also includes at least one vibration sensor configured to measure vibrations of the genset power system, and a controller. The controller is programmed to receive vibration sensor data from the vibration sensor, and process the vibration sensor data using a modeling software to generate simulated data. The simulated data is filtered using frequency-based filtering to obtain filtered data, and frequency domain information of the filtered data is compared to threshold data to identify the abnormal operating condition of the component.

公开(公告)号：US20180100496A1

公开(公告)日：2018-04-12

申请号：US15287416

申请日：2016-10-06

Applicant: Caterpillar Inc.

Inventor： Yanchai Zhang ,  Venkata Bhagavathi Dandibhotla ,  Zhijun Cai ,  Zhaoxu Dong ,  Xuefei Hu

IPC: F04B51/00 ,  F04B1/00 ,  F04B53/10 ,  G01M3/26

CPC classification number: F04B51/00 ,  F04B1/00 ,  F04B53/10 ,  F04B2201/0201 ,  F04B2205/04 ,  G01M3/26

Abstract: A method for detecting a leak in a pump comprises: monitoring discharge pressure time domain signals of the pump; monitoring piston position time domain signals for each piston of a plurality of pistons; filtering the monitored discharge pressure time domain signals and the monitored piston position time domain signals of each piston of the plurality of pistons via a band pass filter; determining, at each pump revolution for each piston, a sum of product of the filtered discharge pressure time domain signals and the filtered piston position time domain signals; determine, at each pump revolution for each piston, an absolute value of each sum; determining, at each pump revolution, a largest absolute value of the determined absolute values; determining a corresponding piston of the plurality of pistons associated with the largest absolute value; and determining a cylinder of the pump associated with the determined corresponding piston as leaking.

公开(公告)号：US10663372B2

公开(公告)日：2020-05-26

申请号：US15984539

申请日：2018-05-21

Applicant: Caterpillar Inc.

Inventor： Yanchai Zhang ,  Yong Sun ,  Mingang Wang ,  Xuefei Hu ,  Zhaoxu Dong ,  Chunhui Pan

IPC: G01M13/045 ,  E21B41/00 ,  G01M13/028 ,  E21B43/26

Abstract: A rig management system is disclosed. The rig management system may be configured to receive vibration data from a set of sensors installed on one or more elements of a hydraulic fracturing rig. The rig management system may be configured to perform a first processing of the vibration data utilizing a moving window technique to identify a possible failure of a set of bearings. The rig management system may be configured to perform a second processing utilizing a set of processing techniques after identifying the possible failure of the set of bearings. The rig management system may be configured to determine that the possible failure is an actual failure based on a result of performing the second processing. The rig management system may be configured to perform an action after determining that the possible failure is the actual failure.