Fault Diagnostics for Internal Combustion Engines - Current and Future Techniques 2007-01-1603
The adoption of each new level of automotive emissions legislation often requires the introduction of additional emissions reduction techniques or the development of existing emissions control systems. This, in turn, usually requires the implementation of new sensors and hardware which must subsequently be monitored by the on-board fault detection systems. The reliable detection and diagnosis of faults in these systems or sensors, which result in the tailpipe emissions rising above the progressively lower failure thresholds, provides enormous challenges for OBD engineers.
This paper gives a review of the field of fault detection and diagnostics as used in the automotive industry. Previous work is discussed and particular emphasis is placed on the various strategies and techniques employed. Methodologies such as state estimation, parity equations and parameter estimation are explained with their application within a physical model diagnostic structure. The utilization of symptoms and residuals in the diagnostic process is also discussed.
These traditional physical model based diagnostics are investigated in terms of their limitations. The requirements from the OBD legislation are also addressed. Additionally, novel diagnostic techniques, such as principal component analysis (PCA) are also presented as a potential method of achieving the monitoring requirements of current and future OBD legislation.
Citation: McDowell, N., McCullough, G., Wang, X., Kruger, U. et al., "Fault Diagnostics for Internal Combustion Engines - Current and Future Techniques," SAE Technical Paper 2007-01-1603, 2007, https://doi.org/10.4271/2007-01-1603. Download Citation
Author(s):
N. McDowell, G. McCullough, X. Wang, U. Kruger, G. W. Irwin
Affiliated:
Internal Combustion Engines Research Group, Queen's University Belfast, Intelligent Systems and Control Research Group, Queen's University Belfast
Pages: 14
Event:
SAE World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Vehicle Diagnostics, 2007-SP-2137, SAE 2007 Transactions Journal of Passenger Cars: Electronic and Electrical Systems-V116-7
Related Topics:
Control systems
Emissions control
Scale models
Fault detection
Failure analysis
On-board diagnostics (OBD)
Sensors and actuators
Legislation
Emissions
Combustion and combustion processes
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