Combustion anomalies detection in SI engines from exhaust pressure signal processing

Abstract

Considerable interest exists in developing diagnosis techniques able to reveal if anomalies in the combustion process of a spark ignition engine appear. A procedure has been implemented that allows the detection of the misfire condition and then identification of the responsible cylinder. The technique is based on the monitoring of the exhaust pressure profile and on the processing of such a signal in time and frequency domains in order to extract information regarding combustion quality. In this paper, the developed method is presented and experimental results of an application are shown. Both steady-state and transient conditions are considered and the effect of different values of engine speed and load is investigated.

Keywords

reciprocating engine diagnosis misfire

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References

Jianguo

Yichen

Diagnosis of moving components of internal combustion engines by analysing vibration signals. Machine Vibration, 1996, 5, 163–169.

Azzoni

Minelli

Moro

The laser in the fully non-contact measurement of the pressure waveform in a multi-cylinder SI engine during free acceleration tests. Proc. of the 1995 Advanced Measurement Techniques and Sensory Systems for Automotive Applications: Accuracy and Reliability Conference and Exhibition, Ancona, Italy, 29-30 June 1995, pp. 395–404.

DeJong

R. G.

Powell

R. E.

Manning

J. E.

Engine monitoring using vibration signals. SAE technical paper no. 861246, 1986.

Rizzoni

Ribbens

Crankshaft position measurement for engine testing, control and diagnosis. SAE technical paper no. 890885, 1989.

Azzoni

Cantoni

Minelli

Moro

Rizzoni

Ceccarani

Mazzetti

Measurement of engine misfire in the Lamborghini 533 V-12 engine using crankshaft speed fluctuations. SAE technical paper no. 950837, 1995.

Moro

Azzoni

Minelli

Misfire pattern recognition in high performance SI 12-Cylinder engine. SAE technical paper no. 980521, 1998.

Plapp

Klenk

Moser

Methods of on-board misfire detection. SAE technical paper no. 900232, 1990.

Klenk

Moser

Muller

Wimmer

Misfire detection by evaluating crankshaft speed-a means to comply with ORB II. SAE technical paper no. 930399, 1993.

Chiatti

Chiavola

Time-frequency simulation of complete exhaust system to analyseengine misfiring. Proc.of the 2000 High-Tech Engines and Cars International Conference, Modena, Italy, 25-26 May 2000.

10.

Conforto

D'Alessio

Real time monitoring of muscular fatigue from dynamic surface myoelectric signals using a complex covariance approach. Mech. Engng Phys., 1999, 21, 225–234.

11.

Chiavola

Conforto

Exhaust pressure signal for automotive engines diagnosis. Proc. of the 2001 Automotive and Transportation Technology Congress and Exhibition, 2001, P-371, 21–28.

12.

Papoulis

Probability random variables and stochastic processes, 2nd ed, 1984 (McGraw-Hill Book Company, New York).