American Society of Agricultural and Biological Engineers



Click on “Download PDF” for the PDF version or on the title for the HTML version.


If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options.

CHAPTER 8 Ignition Circuits

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Chapter 8, Pages 183-202 (doi:10.13031/2013.24143) in Chapter 8 in Engine and Tractor Power, 4th edition. St. Joseph, Michigan: ASAE. . Copyright 2015 American Society of Agricultural and Biological Engineers, St. Joseph, Mich.
Authors:   Carroll E. Goering and Alan C. Hansen
Keywords:   Mutual Induction, Kettering Ignition Systems, Transistor-Assisted Kettering Ignition Systems, Inductive-Type Electronic Ignition Systems, Integrated Electronic Ignition Systems, Magneto Ignition Systems, Capacitive-Discharge Ignition Systems, Battery-Powered Systems, Capacitive-Discharge Systems for Small Engines, Spark Plugs, Microprocessor Control in Automotive Vehicles

Spark-ignited engines require a spark to initiate burning of the air-fuel mixture in the combustion chamber. The spark in each cylinder is provided by a spark plug and is actually a flow of electrical current through the air and fuel vapor between the closely spaced electrodes of the spark plug. The resistance of air is very high. Therefore, a 15,000- to 30,000-V potential across the gap is used to fire the plug. Typically, the ignition system must supply this high voltage from a 12-V storage battery. Moreover, the spark must begin at the proper point in the cycle and must be of sufficient duration.

(Download PDF)    (Export to EndNotes)