A Method of Misfire Detection by Superposing Outputs of Combustion Pressure Sensors

M. Komachiya; N. Kurihara; A. Kodama; T. Sakaguchi; T. Fumino; S. Watanabe

doi:10.4271/982588

1998-10-19

A Method of Misfire Detection by Superposing Outputs of Combustion Pressure Sensors 982588

An onboard diagnosis method for misfire detection that utilizes a superposed output of combustion pressure sensors (CPS's) is proposed and examined. We consider a model case where piezo-electric type CPS's are installed for each cylinder of a four-stroke-four-cylinder gasoline engine. The outputs of the CPS's are linearly combined to obtain the superposed signal. We show that the superposed signal exhibits a characteristic change when a misfire occurs. A waveform analysis of the signal leads to a clear detection of misfires. A combination setup with a non-intrusive type of fiber-optic CPS that is installed into the cylinder head gasket is also discussed as a future option for the sensing system.

SAE MOBILUS

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

Access SAE MOBILUS »

Digital $35.00 Print $35.00

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

A Method of Misfire Detection by Superposing Outputs of Combustion Pressure Sensors 982588

SAE MOBILUS