What is the purpose of the delivery check...

Question 1 / 270705eccefa2bacbc34ba4d4786f

Question 1 of 270705eccefa2bacbc34ba4d4786f

What is the purpose of the delivery check valve used in a diesel fuel injection jerk pump?

Question 1 of 27070

What is the purpose of the delivery check valve used in a diesel fuel injection jerk pump?

🔍 Key Concepts

• Jerk-type fuel injection pump operation cycle (suction, pumping, cutoff) • Flow path of fuel from the plunger to the injector nozzle and back toward the pump • What happens to pressure and nozzle needle movement at the end of injection

💭 Think About

• Think about which component actually stops fuel injection: is it mainly the plunger/helix, the injector nozzle, or the delivery check valve? • Ask yourself what would happen inside the high‑pressure fuel line and injector if there were no delivery check valve at the end of the pump stroke. • Consider which option best explains how the system avoids dribbling or secondary injection after the main shot of fuel.

✅ Before You Answer

• Verify which part controls start and end of injection in a jerk pump (plunger vs. check valve vs. injector). • Check which function would prevent pressure from dropping too slowly in the injection line after the pump stroke. • Eliminate any choice that describes a function already performed by the plunger helix (fuel metering and spill‑back).

Question 1 of 27070

What is the purpose of the delivery check valve used in a diesel fuel injection jerk pump?

To assist in a quick cutoff of fuel injection

To allow oil backflow from the injector to the helix

To meter the quantity of fuel delivered

To reduce fuel oil pressure between injection strokes

Question 1 / 270705eccefa2bacbc34ba4d4786f

Question 1 of 270705eccefa2bacbc34ba4d4786f

What is the purpose of the delivery check valve used in a diesel fuel injection jerk pump?

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Question 1 of 27070

What is the purpose of the delivery check valve used in a diesel fuel injection jerk pump?