1996-02-01

Knock Detection Using Spectral Analysis Techniques on a Texas Instruments TMS320 DSP 960614

ABSTRACT

An efficient method of detecting engine knock using spectral analysis is presented. Multiple single-point DFTs are used to condition the measured knock signal. Using multiple frequencies in the detection algorithm provides a better signature of the combustion process and enhances the ability to detect low-level knock across the entire operating range of the engine. The detection strategy compares the DFT outputs to a variable reference to determine a knock intensity metric. Unlike currently used techniques, the algorithm adapts the reference (no-knock condition) to varying engine speeds and loads. An overview of the knock detection problem and current technology is presented.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
X