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Technical Paper

Combustion Supervision by Evaluating the Crankshaft Speed and Acceleration

2000-03-06
2000-01-0558
Modern Diesel injection systems have to serve different demands. Beside the improvement of the injection timing and assignment special concentration is focused on increasing injection pressure to improve combustion and lower exhaust gas emissions. With the higher complexity of these systems and the high burden on the pump components especially in the high pressure part of the injection pumps, the wish for supervision of delicate components occurs. Therefore suitable and efficient supervision methods have to be developed to early detect initiating faults. Because of the correlation between combustion and injection, one way to detect faults in the injection system is to supervise the combustion in the individual cylinders. This can be done by evaluating the crankshaft speed at the flywheel. Speed is directly related to combustion by the indicated pressure and the indicated torque respectively, the crankshaft drive and the resulting torque at the crankshaft.
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