Caterpillar Inc.

Mitchel Ryan Deckard

James B Maddock

Phillip J Houtz

Gregg W Uhland

James Wallace Harris

Charles J Kocian

Troy A Parker

Kevin A Lantz

David L Frohberg

Steven James Bickett

Operating an internal combustion engine system includes combusting gaseous hydrogen fuel and gaseous hydrocarbon fuel at a first substitution ratio in a plurality of cylinders in an engine, inputting an emissions cost value and a hydrogen cost value to a fuel blending control system for the engine, and determining, by way of an electronic control unit of the fuel blending control system, a fuel blending control term based on the respective cost values. Operating the engine system further includes varying admission of at least one of the hydrogen fuel or the hydrocarbon fuel to an intake system for the engine based on the fuel blending control term, and combusting the hydrogen fuel and the hydrocarbon fuel at a second substitution ratio produced by the varied admission in the plurality of cylinders in the engine.

Cost based substitution ratio control in hydrogen-capable internal combustion engine system

A method of controlling a common rail fuel system for an engine is disclosed. The method includes delivering fuel to a fuel injector fluidly coupled to a common rail. The common rail is fluidly coupled to a fuel tank through a pump. The method also includes sending a signal to the fuel injector to deliver a first quantity of fuel to the engine. The first quantity being indicative of a desired power from the engine. The method further includes detecting a fuel transfer pressure upstream of the pump, and derating the engine as a function of the detected fuel transfer pressure. The derating includes decreasing the first quantity of fuel.

Common rail fuel control system

A method for controlling an engine turbocharger having a wastegate control valve is provided where the turbocharger is controlled by an electronic controller which is capable of delivering a wastegate control signal to the wastegate control valve. A determination is made as to whether an engine speed falls within a predetermined speed range defined by a first predetermined speed and a second predetermined speed, where the second predetermined speed is higher than the first predetermined speed. A predetermined initializing wastegate control signal may be delivered to the wastegate control valve in response to the engine speed falling within the predetermined speed range. A determination is made as to whether an engine speed exceeds the second predetermined speed, and a determination is made as to whether an engine load falls within a predetermined load range defined by a first predetermined load and a second predetermined load, where the second predetermined load is greater than the first predetermined load. A stored control signal value is retrieved from memory associated with the electronic controller and a wastegate control signal corresponding thereto is delivered to the wastegate control valve in response to the engine speed exceeding the second predetermined speed and the engine load falling within the predetermined load range. The stored control signal value may be updated with a learned control signal value determined during certain engine operating conditions.

Apparatus and method for utilizing a learned wastegate control signal

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Lafayette, IN, United States of America

Mitchel Ryan Deckard