Caterpillar Inc.

Rodney D Harms

Yanchai Zhang

Todd R Kabrich

Xuefei Hu

Yuesheng He

Zhaoxu Dong

Shawn M Damm

Sri Harsha Uddanda

Yifeng Lu

Arun Rajendran

Lidi Chen

A hydraulic fracturing pump system may include a hydraulic fracturing pump, a gaseous fuel engine configured to drive the hydraulic fracturing pump, and a transmission system including a gear system mechanically coupled to the hydraulic fracturing pump and torque converter configured to fluidly couple the gaseous fuel engine and the gear system. The torque converter may include an impeller, a turbine fluidly coupled to the impeller and mechanically coupled to the gear system, a stator positioned between the impeller and the turbine, an impeller clutch configured to mechanically couple the impeller to the gaseous fuel engine, and a lockup clutch configured to mechanically couple the gaseous fuel engine and the gear system.

Control of an impeller clutch of a torque converter for a gaseous fuel engine

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.

Valve lash detection and analysis

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Houston, TX, United States of America

Rodney D Harms