Misfire detection method and control unit of an internal combustion engine
AssigneeCaterpillar Energy Solutions GmbH
InventorDarshit Shah
Life of this patent
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Abstract
The present invention refers to a misfire detection method for an internal combustion engine, in particular a stationary gas engine for power generation, comprising a step of determining whether the engine is subjected to an unintended performance variation and a step of detecting a misfire condition of the engine by qualifying the unintended performance variation as being caused by a misfire during operation of the engine.
Claims14
A misfire detection method for a stationary internal combustion gas engine for power generation, the method comprising:
- determining an operating mode of the stationary internal combustion gas engine, wherein the operating mode corresponds to a grid parallel operating mode or an island operating mode;
- obtaining a power measurement signal of the stationary internal combustion gas engine via a power output sensor when the operating mode corresponds to the grid parallel operating mode;
- obtaining the power measurement signal and a speed measurement signal of the stationary internal combustion gas engine via the power output sensor and an engine speed sensor when the operating mode corresponds to the island operating mode;
- determining whether the engine is subjected to an unintended performance variation based on the power measurement signal when the operating mode corresponds to the grid parallel operating mode or based on the power measurement signal and the speed measurement signal when the operating mode corresponds to the island operating mode;
- and
- detecting a misfire condition of the engine by qualifying the unintended performance variation as being caused by a misfire during operation of the engine.
A control unit for misfire detection of a stationary internal combustion gas engine, which communicates with a power output sensor and an engine speed sensor, wherein the control unit is configured to:
- determine an operating mode of the stationary internal combustion gas engine, wherein the operating mode corresponds to a grid parallel operating mode or an island operating mode;
- obtain a power measurement signal of the stationary internal combustion gas engine via the power output sensor when the operating mode corresponds to the grid parallel operating mode;
- obtaining the power measurement signal and a speed measurement signal of the stationary internal combustion gas engine via the power output sensor and the engine speed sensor when the operating mode corresponds to the island operating mode;
- determine an unintended performance variation of the engine based on the power measurement signal when the operating mode corresponds to the grid parallel operating mode or based on the power measurement signal and the speed measurement signal when the operating mode corresponds to the island operating mode;
- and
- detect a misfire condition of the engine by qualifying the unintended performance variation as being caused by a misfire during operation of the engine.
Dependencies are inferred from the claim text.