When does the effective pump stroke for a scrolled plunger end?
Understand the Problem
The question is asking when the effective pump stroke of a scrolled plunger comes to an end, presenting four possible answers related to different stages of the pumping process.
Answer
When the scroll uncovers the spill port.
The effective pump stroke ends when the scroll uncovers the spill port.
Answer for screen readers
The effective pump stroke ends when the scroll uncovers the spill port.
More Information
In a plunger-type fuel pump, the effective pump stroke refers to the period during which fuel is being pressurized and delivered to the injector.
Tips
A common mistake is confusing the start and end of the effective stroke. Ensure you know when the plunger covers and uncovers the spill port.
Sources
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