Spark advance

Early automobiles had a spark control that allowed the timing of the spark with respect to the position of the piston to be manually adjusted. Retarded too much, the engine would not run well at high speeds. Advanced too much and the engine would fire too soon and kick while being cranked. This sometimes resulted in a broken arm.

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Noun

spark advance - the timing of ignition relative to the position of the piston in an internal-combustion engine

lead

timing - the time when something happens

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References in periodicals archive

* in case of increased speed, duration time at high temperature decreases along with emission; nevertheless, this phenomenon is also influenced by spark advance;

Parameter analysis of no emissions from spark ignition engines

Yuba Ball Tread tractors all had high tension magneto ignition with automatic spark advance, and water pump cooling systems.

The Crawler that Rolled

Also designed specifically for industrial engine use, the S-15 system has a programmable spark advance map a direct interface with GM EST-style distributors, an internal main fold absolute pressure sensor, a programmable rev-limiter advance curve compensation for gasoline and LP engines with engine temperature compensation.

NEW TOTAL ENGINE CONTROL SYSTEM

Automatic spark advance later was built into the distributor.

Power to burn; a history of the spark-ignition engine

The Electroair's spark advance varies by engine and aircraft application and can be as much as a total of 45 degrees BTDC, according to Electroair's Kobylik.

Electroair ignition: affordable electronics: this system replaces one magneto and offers aggressive spark advance. The acid test will be deomonstrated real-world fuel savings and reduced maintenance

mechanical." The description of the Lycoming IE (2) system again raises the question of why most of us are still flying behind antiquated mixture, ignition and engine control systems, when even the most economical compact car sports electronic ignition, fuel injection and variable spark advance.

Electrical vs. mechanical

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