Duty cycle is the percentage of injector on-time.

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Multiple Choice

Duty cycle is the percentage of injector on-time.

Explanation:
Duty cycle describes the portion of each engine cycle during which a fuel injector is actively delivering fuel. It is the percentage of time the injector is on within one cycle. For example, if the injector is energized for 2 ms out of a 10 ms cycle, the duty cycle is 20%. The statement that duty cycle is the percentage of injector on-time is correct because it directly measures how long the injector stays open. It’s not the percentage of time the injector is off (that would be the complement, 100% minus the duty cycle), and it’s not the injector current average, which depends on both how long the injector is on and the current level while it’s on.

Duty cycle describes the portion of each engine cycle during which a fuel injector is actively delivering fuel. It is the percentage of time the injector is on within one cycle. For example, if the injector is energized for 2 ms out of a 10 ms cycle, the duty cycle is 20%. The statement that duty cycle is the percentage of injector on-time is correct because it directly measures how long the injector stays open. It’s not the percentage of time the injector is off (that would be the complement, 100% minus the duty cycle), and it’s not the injector current average, which depends on both how long the injector is on and the current level while it’s on.

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