Fault Diagnosis of Fully Variable Valve Actuators on a Four Cylinder Camless Engine

Fully Variable Valve Actuation (FVVA) systems enable to employ a wide range of combustion strategies by providing the actuation of a gas exchange valve at an arbitrary point in time, with variable lift and adjustable ramps for opening and closing. Making such a system ready for the market requires a...

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Veröffentlicht in:SAE International journal of engines 2009-01, Vol.1 (1), p.960-969, Article 2008-01-1353
Hauptverfasser: Saraç, Ipek, Mischker, Karsten
Format: Artikel
Sprache:eng
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Zusammenfassung:Fully Variable Valve Actuation (FVVA) systems enable to employ a wide range of combustion strategies by providing the actuation of a gas exchange valve at an arbitrary point in time, with variable lift and adjustable ramps for opening and closing. Making such a system ready for the market requires appropriate fault-diagnostic functionality. Here, we focus on diagnosis possibilities by using air intake system sensors such as Manifold Absolute Pressure (MAP) sensors. Results obtained on a 4-cylinder test bench engine are presented for the early intake opening strategy under different loads, and at medium range rotational speeds on steady-state conditions. It is shown that detection and identification of the different critical faults on each actuator is possible by using a Fourier series signal model of the MAP sensor.
ISSN:1946-3936
1946-3944
1946-3944
DOI:10.4271/2008-01-1353