A Time Domain Based Diagnostic System for Misfire Detection in Spark-Ignition Engines by Exhaust-Gas Pressure Analysis 2000-01-0366
For the cylinder-selective monitoring of combustion cycles in spark-ignition engines, the dynamic exhaust-gas pressure is analyzed. A time domain based diagnostic system for misfire detection has been developed and tested on data measured in a BMW 750i, V-12 engine. It uses features of the suitable low-pass-filtered exhaust-gas pressure signal by calculating differences of the locally determined extrema. For the detection and localization of all misfire combinations a simple inference system in the form of linguistic rules is used. It is shown that even within the operating areas of high engine speeds and low loads on engines with a high number of cylinders good classification rates can be obtained. In addition to the development of the method, experiments were carried out to examine the robustness and restrictions of the approach under special operation conditions and at the limits of the engine as well as phenomena occurring in coupled exhaust-pipes with mufflers and combustion-related influences.
Citation: Willimowski, M. and Isermann, R., "A Time Domain Based Diagnostic System for Misfire Detection in Spark-Ignition Engines by Exhaust-Gas Pressure Analysis," SAE Technical Paper 2000-01-0366, 2000, https://doi.org/10.4271/2000-01-0366. Download Citation
Author(s):
Markus Willimowski, Rolf Isermann
Affiliated:
Darmstadt University of Technology
Pages: 14
Event:
SAE 2000 World Congress
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
On- and Off-Board Diagnostics-PT-81, Electronic Engine Controls 2000: Modeling, Neural Networks, Obd, and Sensors-SP-1501
Related Topics:
Spark ignition engines
Combustion and combustion processes
Engine cylinders
Pressure
Mufflers
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »