spark advance

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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.
1001 Words and Phrases You Never Knew You Didn’t Know by W.R. Runyan Copyright © 2011 by W.R. Runyan
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.spark advance - the timing of ignition relative to the position of the piston in an internal-combustion engine
timing - the time when something happens
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* in case of increased speed, duration time at high temperature decreases along with emission; nevertheless, this phenomenon is also influenced by spark advance;
Yuba Ball Tread tractors all had high tension magneto ignition with automatic spark advance, and water pump cooling systems.
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.
Automatic spark advance later was built into the distributor.
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.
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.