Caterpillar Motoren Gmbh & Co. Kg

Caterpillar Motoren Gbmh & Co. Kg

Hannes Marscheider

Eike Joachim Sixel

Daniel Wester

Scott Byron Fiveland

Travis E Barnes

Christopher F Gallmeyer

Arvind Sivasubramanian

Robert Graumüller

Andrew Neaville

Adam Stubbs

Andre Schmidt

Aradhita Chakrabarty

Robert Charles Calderwood

Thorsten Tuexen

Marius Wolfgramm

Chris Gallmeyer

Jedediah A Frey

Andrew J Neaville

Eike Sixel

Lukas Andresen

Jedediah Frey

Robert Calderwood

Scott Fiveland

Aradhita Subirkumar Chakrabarty

Hannes STRÜBING

Michal Kostkowski

Dirk Mooser

Christian Hohenwald

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 of evaluating operability of a gaseous fuel admission valve of an internal combustion engine is disclosed. The method includes operating the internal combustion engine on gaseous fuel by repeatedly actuating the gaseous fuel admission valve. The method further includes measuring a sequence of temporal developments of an electrical operation parameter respectively associated with an actuation of the gaseous fuel admission valve. The sequence includes a first temporal development to be evaluated and a plurality of temporal developments preceding the first temporal development. The method also includes evaluating operability of the gaseous fuel admission valve based on the first temporal development of the measured sequence and at least one of the plurality of preceding temporal developments of the measured sequence.

Electrical monitoring of gaseous fuel admission valves

A method for supplying fuel to an engine is disclosed. The method may include regulating a gas admission valve disposed between a gaseous fuel line and a cylinder intake port to reduce flow of gaseous fuel to the cylinder. The method may also include closing a shut-off valve disposed between a gaseous fuel reservoir and the gaseous fuel line to restrict flow of gaseous fuel from the gaseous fuel reservoir to the gaseous fuel line. Further, the method may include actuating an inert gas inlet valve disposed between an inert gas reservoir and the gaseous fuel line to supply inert gas to the gaseous fuel line and flush the gaseous fuel in the gaseous fuel line into the cylinder via the gas admission valve. Additionally, the method may include closing the inert gas inlet valve to restrict supply of inert gas to the gaseous fuel line.

Method of supplying fuel to engine

Growing community of inventors

Kiel, Germany

Hannes Marscheider