When the lower edge of the spiral begins to...

Question 1 / 205eccefa2bacbc34ba4d4789e

Question 1 of 205eccefa2bacbc34ba4d4789e

When the lower edge of the spiral begins to uncover the release port in a jerk pump, the __________.

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Question 1 of 20

5eccefa2bacbc34ba4d4789e

When the lower edge of the spiral begins to uncover the release port in a jerk pump, the __________.

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🔍 Key Concepts

• jerk-type fuel injection pump operation • role of the helix (spiral) and release/spill port in controlling fuel delivery • difference between total plunger travel and effective pumping stroke

💭 Think About

• Think about what happens to fuel pressure in the delivery line the moment the release (spill) port is uncovered by the spiral on the plunger. • Does fuel injection continue all the way to the physical end of the plunger’s upward stroke, or does it stop earlier for a specific hydraulic reason? • Consider whether the plunger’s rotation happens during the pumping stroke or is set before the stroke by the control rack.

✅ Before You Answer

• Identify when the high-pressure part of the stroke actually ends: is it when the plunger stops moving, or when pressure can no longer build in the delivery line? • Check which option best describes the moment injection pressure collapses quickly because fuel has an escape path through the release port. • Verify that the choice you pick correctly distinguishes between mechanical movement of the plunger and the useful (effective) pumping action that delivers fuel to the injector.

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Question 1 of 20

When the lower edge of the spiral begins to uncover the release port in a jerk pump, the __________.

pumping continues until the plunger travels its full stroke

effective pumping stroke of the plunger ends

pressure drops slowly until the full stroke is attained

plunger rotates to the zero delivery position until the next stroke

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Question 1 / 205eccefa2bacbc34ba4d4789e

Question 1 of 205eccefa2bacbc34ba4d4789e

When the lower edge of the spiral begins to uncover the release port in a jerk pump, the __________.

Back

Question 1 of 20

5eccefa2bacbc34ba4d4789e

When the lower edge of the spiral begins to uncover the release port in a jerk pump, the __________.

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed