| 摘要 |
A monitoring unit for determining the operational condition of an engine, the engine comprising a plurality of cylinders, each cylinder comprising a combustion chamber into which fuel is injected by an associated fuel injector, the unit comprising inputs for receiving first data related to engine rotation, storage means (58) for storing a plurality of templates, each template comprising second data related to engine rotation, said second data being characteristic of a particular operational condition, and one or more engine parameters associated with said operational condition, and processing means (56) configured: i) to compare said received first data to said second data in order to determine a best matching template, and ii) to determine the operational condition of the engine in dependence on said one or more engine parameters associated with said best matching template.
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