Universal diagnostic method and system for engines

Details Universal diagnostic method and system for engines Universal diagnostic method and system for engines

2006-04-11

2006-04-11

Vo, Hieu T. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C073S114220

Reexamination Certificate

active

07027909

ABSTRACT:
A method and system are provided for diagnosing the health-condition of engines, in particular internal combustion reciprocating engines, in which the harmonic terms of the Fourier series representation of the engine vibration are correlated with the mechanical state of the engine. In particular, the characteristics of the harmonic components of the Fourier representation are monitored at one or more predetermined frequencies according to at least one first predetermined criterion, and the characteristics of these harmonic components are analysed according to at least one second predetermined criterion to determine the operational state of the engine correlated to the second criterion.

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Macian et al., Condition Manitoring of Thermal Reciprocating Engines Through Analysis of Rolling Block Oscillations., SAE technical paper 980116, 1998 (Society of Automobile Engineers, Warrendale, PA).
deBotton et al., Vibration Signature Analysis as a Fault Detection Method for SI Engines., SAE technical paper 980115, 1998 (Society of Automobile Engineers, Warrendale, PA).

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