Caterpillar Inc.

Michael Todd Graziano, Jr

Eric Lee Schroeder

Jaswinder Singh

Andrew Neaville

David Todd Montgomery

Christopher Ronald Gehrke

Jeffrey Michael Thate

Patrick J Seiler

Geetika Dilawari

Zachary S Engstrom

Erik Alexander Lau

John D Parker

A machine includes an engine that includes a plurality of cylinders, one or more controllers, and a monitoring and reporting module. The monitoring and reporting module receives, from the one or more controllers, and via a first data link of the machine, cylinder pressure data associated with the plurality of cylinders and stores the cylinder pressure data in a data structure. The monitoring and reporting module receives, from the one or more controllers, and via a second data link of the machine, operational information associated with the engine and determines, based on the operational information, that one or more trigger criteria are satisfied. The monitoring and reporting module generates, based on determining that the one or more trigger criteria are satisfied, a data file that includes a portion of the cylinder pressure data and transmits the data file to a device not included in the machine.

Optimized high-speed cylinder pressure data retrieval and reporting

Operating an engine system includes combusting a gaseous hydrogen fuel (H2) and a gaseous hydrocarbon fuel (HC) at a first substitution ratio in a cylinder in an engine, determining at least one of an H2 fueling command or an HC fueling command based on an H2 availability input and an H2 cost, and outputting the H2 fueling command and the HC fueling command to an H2 injector and an HC admission valve, respectively. Operating the engine system further includes combusting H2 and HC at a varied substitution ratio based on the H2 fueling command and the HC fueling command. At least one of the H2 fueling command or the HC fueling command may be based on a monitored CO2 exhaust level which may be used to populate a stored history of CO2 output.

Dual fuel engine operating strategy for optimized hydrogen and hydrocarbon fueling

Operating a gaseous fuel engine system includes detecting preignition in one or more of a plurality of cylinders based on a monitored cylinder pressure during combustion of a gaseous fuel such as a gaseous hydrogen fuel. Operating a gaseous fuel engine system also includes reducing a fuel injection amount for the one or more of the plurality of cylinders to a derated fuel injection amount that is based on a timing of the detected preignition. Fuel injection amount may be reduced to a greater relative extent if detected preignition is early, and to a lesser relative extent if detected preignition is later, in an engine cycle. Related apparatus and control logic is also disclosed.

Preignition mitigation strategy for gaseous fuel engine

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Washington, IL, United States of America

Michael Todd Graziano, Jr