A New Diagnostic Method of Knocking in a Spark-Ignition Engine Using the Wavelet Transform Industrial Technology Center of Okayama prefecture

Format:

Book

Conference/Event

Author/Creator:

Zhang, Zhong, author.

Conference Name:

CEC/SAE Spring Fuels & Lubricants Meeting & Exposition (2000-06-19 : Paris, France)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2000

Summary:

The wavelet transform, which is a well-known and remarkable way of processing unsteady signals, is considered to surpass Fourier analysis and is applied in various fields. In this study, we analyze the pressure signal in a spark-ignition engine and the vibration of the engine block under the knocking conditions when knocking is caused. We then propose a new knocking detection method which we call wavelet pattern matching and is based on the frequency characteristics of the knocking signal to detect the knocking. Our experiments demonstrate the advantages of our approach and the main results obtained can been summarized as follows: 1) Knocking resonant frequencies decrease with time, and this phenomenon is useful for the knocking detection. 2) The wavelet pattern matching method which is based on the frequency characteristics of the knocking is very useful for knocking detection, even when the noise level is higher than the knocking level

Notes:

Vendor supplied data

Publisher Number:

2000-01-1801

Access Restriction:

Restricted for use by site license