Fault Diagnosis of Fully Variable Valve Actuators on a Four Cylinder Camless Engine 2008-01-1353
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.
Citation: Saraç, I. and Mischker, K., "Fault Diagnosis of Fully Variable Valve Actuators on a Four Cylinder Camless Engine," SAE Int. J. Engines 1(1):960-969, 2009, https://doi.org/10.4271/2008-01-1353. Download Citation
Author(s):
Ipek Saraç, Karsten Mischker
Affiliated:
Robert Bosch GmbH
Pages: 10
Event:
SAE World Congress & Exhibition
ISSN:
1946-3936
e-ISSN:
1946-3944
Also in:
Variable Valve Optimization, 2008-SP-2174, SAE International Journal of Engines-V117-3EJ, SAE International Journal of Engines-V117-3
Related Topics:
Sensors and actuators
Combustion and combustion processes
Manifolds
Valves
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