1974-02-01

Methods of Investigating Spark Timing and Its Scatter 740314

The investigation into spark timing characteristics was carried out on a 2000 cm3 Ford Pinto engine mounted in a test cell. Autolite, Lumenition, and Bosch ignition systems have been investigated.
Two methods of measurement of spark timing and timing scatter are proposed, and evaluated in terms of dynamic and static engine behavior. The relationships between mechanical and the electrical aspects of ignition are discussed, particularly with regard to contact breaker and optoelectronic firing.

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