Control of the internal combustion engine

Abstract

An internal combustion engine uses gaseous main fuel and liquid pilot fuel and has a plurality of cylinders and an engine controller capable of adjusting a burning state of each cylinder through fuel regulation, including fuel cut off, upon occurrence of abnormal combustion. A method of operating the internal combustion engine includes, upon occurrence of abnormal combustion in a cylinder in a gaseous mode, cutting off the main fuel into only the cylinder and the fuel injection is kept partially active with a pilot fuel injected by a pilot nozzle of the cylinder.

Description

technical field [0001] The present invention relates to the control of an internal combustion engine when abnormal combustion occurs. An engine capable of stepping or continuously correcting a combustion state by fuel adjustment including a fuel cut operation to perform shutdown or output limiting operation of the engine, and also relates to an apparatus for controlling an internal combustion engine when abnormal combustion occurs. Background technique [0002] For internal combustion engines, it is very important to avoid extreme operating points of the engine such as heavy knock and misfire. Heavy knocks cause excessive rapid pressure oscillations, which potentially lead to total collapse of mechanical components. Cylinder misfiring again significantly increases emissions and is potentially detrimental to the catalyst. Also, with gasoline engines, it is very important to cut off the fuel supply to misfiring cylinders, because otherwise the gasoline will flow into the exh...

AI Technical Summary

Problems solved by technology

In WO2008038827A1, no consideration is given to the detailed control of the operation of the fuel cutoff of the engine when abnormal combustion occurs

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