Internal combustion engine's chattering detecting signal processing method for automobile industry, involves determining presence of chattering in internal combustion engine when chattering operator is greater than specific value

摘要

The method involves comparing a utilizing signal to a linear combination of resonances satisfying a specific formula having parameters. A specific value is compared to a small value. The utilized signal is estimated utilizing a limited development at a particular order around nominal resonance frequencies. A chattering operator is calculated, and a value of the operator is compared with a threshold value. Presence of the chattering in an internal combustion engine (M) is determined when the operator is greater than another specific value. The parameters can be phase difference, number of consecutive resonances of the utilized signal and real resonance frequency which varies from a specific value around a nominal resonance frequency.