| 摘要 |
A method and apparatus for identifying misfiring cylinders using crankshaft angular velocity measurements. The measured angular velocity is used in conjunction with a system model to estimate the indicated torque developed by each cylinder. The method and apparatus provides accurate results for engines with overlapping firing pulses, and also under conditions in which there is large torsional deflection in the crankshaft. The method and apparatus is suitable for implementation with on-board misfire diagnostics. Experimental validation is provided using a nineteen liter, six cylinder diesel engine. The experimental data demonstrates that accurate detection and identification of misfiring cylinders is possible over the full speed and load range of the engine.
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