Caterpillar Motoren Gmbh & Co. Kg

Caterpillar Motoren Gbmh & Co. Kg

Caterpillar Motoren Rostock Gmbh

Andre Schmidt

Scott Byron Fiveland

Arvind Sivasubramanian

Eike Joachim Sixel

Daniel Wester

Robert Graumüller

Adam Stubbs

Bert Ritscher

Hannes Marscheider

Aradhita Chakrabarty

Stefan Haas

Marius Wolfgramm

Kay Schwerdtfeger

Kai Ruschmeyer

Christian Hoffmann

Hendrik Herold

Eike Sixel

Scott Fiveland

Aradhita Subirkumar Chakrabarty

Hannes STRÜBING

Michal Kostkowski

Dirk Mooser

A method of operating a gaseous fuel internal combustion engine comprises performing at least one measurement relating to the combustion of a mixture of gaseous fuel and air in a combustion chamber of an associated cylinder in a combustion cycle. At least one combustion parameter, for example, a start of combustion, is determined based on the at least one measurement. When the combustion parameter differs from a desired combustion parameter, an ignition device associated with the cylinder is controlled based on the comparison in order to control the combustion in the current combustion cycle.

Method of operating a gaseous fuel internal combustion engine

An engine control system comprises a balancing arrangement together with a knock mitigation controller configured to implement a knock mitigation procedure wherein an offset input value (V) is applied to the balancing algorithm. The offset input value (V) may cause the balancing algorithm to adjust the control output (O) for the respective one of the combustion chambers to progressively vary the fuel supply or ignition timing for the affected cylinder to mitigate the knock condition. Alternatively, the controller may generate an offset output value (V) to more rapidly vary the fuel supply or ignition timing, with the offset input value (V) being selected for example to compensate for the resulting change in the control input (I) from the cylinder to the balancing algorithm, or to provide additional, more gradual adjustment to further mitigate the knock condition.

Knock mitigation and cylinder balancing in an internal combustion engine

A method for starting a gaseous fuel internal combustion engine is disclosed. According to the disclosed method, the engine is rotated using a start device until a first speed threshold is reached. After reaching the first speed threshold, pilot fuel is supplied to a plurality of cylinders of the engine to combust the same. After performing an ignition health check, gaseous fuel is supplied to all or a relatively large number of cylinders to start accelerating the engine up to a second speed threshold.

Method for starting a gaseous fuel combustion engine

A process of controlling operation in a multi-cylinder engine either during start of operation or low-load conditions is disclosed. The process may include skipping a supply of fuel in a first set of cylinders of the multi-cylinder engine for a pre-defined number of multiple working cycles. The process may further include supplying fuel-air mixture to a second set of cylinders of the multi-cylinder engine for the pre-defined number of multiple working cycles. The process may also include executing combustion of the fuel-air mixture supplied to the second set of cylinders for the pre-defined number of multiple working cycles. In addition the process may include either changing a selection of cylinders included in the first set of cylinders and the second set of cylinders respectively, or switching the supply of fuel, after the pre-defined number of multiple working cycles, from the second set of cylinders to the first set of cylinders.

Process of controlling operation in a multi-cylinder engine

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Rostock, Germany

Andre Schmidt