Using the firing interval formula, which expression gives the firing interval?

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Multiple Choice

Using the firing interval formula, which expression gives the firing interval?

Explanation:
Firing interval is the angular distance, in crankshaft degrees, between consecutive cylinder firings on a multi-cylinder four-stroke engine. In a four-stroke engine, one complete engine cycle spans 720 crankshaft degrees, and all cylinders fire once per cycle. With N cylinders firing evenly, the spacing between each firing is 720 degrees divided by the number of cylinders. That’s exactly the expression where degrees per cycle (720°) is divided by the number of cylinders. Other expressions mix speed or multiply in ways that don’t give the true angular separation between fires.

Firing interval is the angular distance, in crankshaft degrees, between consecutive cylinder firings on a multi-cylinder four-stroke engine. In a four-stroke engine, one complete engine cycle spans 720 crankshaft degrees, and all cylinders fire once per cycle. With N cylinders firing evenly, the spacing between each firing is 720 degrees divided by the number of cylinders. That’s exactly the expression where degrees per cycle (720°) is divided by the number of cylinders. Other expressions mix speed or multiply in ways that don’t give the true angular separation between fires.

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