Combustion Diagnostics in Methane-Fueled SI Engines Using the Spark Plug as an Ionization Probe

Fei An; Giorgio Rizzoni; Devesh Upadhyay

doi:10.4271/970033

1997-02-24

Combustion Diagnostics in Methane-Fueled SI Engines Using the Spark Plug as an Ionization Probe 970033

The process of incorporating the spark plug as a combustion probe, to perform misfire and knock detection, air to fuel ratio and spark timing control has been the subject of research for some time now. [3], [4]. The feasibility of the approach however depends on being able to correlate some characteristic of the ion current signal to the in cylinder combustion process. Shimaski et al. [3] and Miyata et al. [4] suggest such a relationship.

The objective of this research has been to extract combustion information from the measured ion current flowing between spark plug electrodes by using various advanced signal processing methods, and to develop a methodology that will permit combustion diagnostics and possibly control based on these measurements. Tests were carried out on a single-cylinder, methane-fueled CFR engine. Results indicate that a nonlinear correlation exists between ion current and combustion pressure and that the developed signal processing methods permit extraction of useful combustion information from the measured ion current signals.

SAE MOBILUS

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

Access SAE MOBILUS »

Digital $37.00 Print $37.00

Preview Document

We also recommend:

Standards

SAE Mobilus®

Publications

News

Events

Professional Development

A World in Motion (PreK-12)

Participate with SAE

SAE Membership

Donate

Combustion Diagnostics in Methane-Fueled SI Engines Using the Spark Plug as an Ionization Probe 970033

SAE MOBILUS