Method for detecting fault of combustion diesel engine system of motor car, involves estimating torque value from combustion of amplitude values, and comparing estimated amplitude values with threshold value to detect any engine failures

摘要

The method involves receiving scroll duration values from sensor measuring scroll pins (101) arranged on a ring that is attached to a flywheel or a crankshaft. The scroll duration values corresponding to respective harmonic frequencies are determined (106). A torque value is estimated (107) from combustion of harmonic amplitude values. A comparison is performed (108, 110) from the estimated combustion of harmonic amplitude values with a threshold value to detect any engine failures. A linear combination of harmonic amplitude values is realized during the combustion process. An independent claim is also included for a device for detecting fault of a combustion engine system.