By Topic

The design and performance of an in-car misfire warning light system

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Johnson, W.J. ; Ford Motor Company, Dearborn, MI ; Rado, W.G.

An in-car warning system has been designed which indicates the occurrence of excessive engine misfires by analyzing the ionization signals obtained from each spark plug's center electrode. A prototype model of this design has been built and evaluated on a 2000 cc, 1973 production four-cylinder engine. Reliable operation was achieved from idle to 6000 rpm. The system consists of two basic elements, adapters for each cylinder that fit into the distributor cap for obtaining the combustion signals, and a simple electronic circuit for analyzing these signals and activating a warning light. Since the adaptors consist only of a 20 MΩ isolation resistor and a connector, they could easily be designed as an integral part of the distributor cap. Since the instrument will detect excessive misfiring conditions, including those caused by broken or shorted spark plug wires, and has the self-checking feature of turning on the indicator lamp for a short period of time when the ignition switch is engaged, it should be useful as a warning system to inform the operator that the engine is in need of repair.

Published in:

Vehicular Technology, IEEE Transactions on  (Volume:27 ,  Issue: 1 )