Caterpillar Inc.

Kaimei Sun

Hongliu Du

David James Lin

Vijay Krishna Yalamanchili

Tyler P Jewell

Vivek Sundararaj

Daniel Jude Organ

William Kent Rutan

Kevin J Graf

Chanyoung Park

A method for identifying a cause of a machine operating anomaly including creating a reduced order model (ROMs) for a digital twin model of a selected machine type and feeding current data from a deployed machine into the ROM. The method can include comparing a current output from the selected ROM with a measured output from the current data and determining that an operating anomaly exists when the difference between the current output and the measured output exceeds a selected anomaly threshold. The cause of the operating anomaly can be identified by feeding the current data into a plurality of fault models, wherein each fault model includes a particular component failure, comparing a fault model output from each of the plurality of fault models with the measured output from the current data, selecting the fault model with the fault model output most closely matching the measured output, and displaying the identified component failure associated with the selected fault model as the cause of the operating anomaly.

Systems and methods for identifying machine anomaly root cause based on a selected reduced order model and a selected fault model

A port plate for a swashplate type axial piston pump is described herein. The port plate includes an inlet port, a discharge port, and a first metering notch in fluidic communication via a first passage with a metering notch area adjustment valve configured to adjust the effective area of the metering notch. The first metering notch is disposed at a leading edge of one of the inlet port or the discharge port.

Hydraulic pump port plate with variable area metering notch

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Peoria, IL, United States of America

Kaimei Sun