The fuel injection pump shown in the...

Question 1 / 270705eccefa2bacbc34ba4d47865

Question 1 of 270705eccefa2bacbc34ba4d47865

The fuel injection pump shown in the illustration, the position of the plunger would give maximum __________. See illustration MO-0063.

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Question 1 of 27070

The fuel injection pump shown in the illustration, the position of the plunger would give maximum __________. See illustration MO-0063.

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

🔍 Key Concepts

• Relationship between plunger position/helix and when the spill port opens or closes in a jerk-type fuel injection pump • Difference between effective stroke (pumping stroke that actually delivers fuel) and bypass/spill period • How changing rack/plunger rotation changes fuel quantity and injection duration

💭 Think About

• Look at where the plunger is relative to the spill/bypass port in the illustration: is the port still open, just closing, or already well covered? What does that do to the length of time fuel is forced to the injector? • Which of the choices would increase when the spill port stays closed for the greatest part of the plunger’s upward stroke? • In this position, is the pump sending the most fuel to the injector or letting the most fuel bypass back to the suction side?

✅ Before You Answer

• Identify the spill or bypass port in the pump barrel and see whether it is open or covered by the plunger • Decide whether this plunger position makes the effective stroke longer or shorter compared with other possible positions • Match a longer effective stroke/longer time under pressure to the single best choice from the four options

Question 1 of 27070

The fuel injection pump shown in the illustration, the position of the plunger would give maximum __________. See illustration MO-0063.

effective stroke

effective pressure

injection duration

fuel bypass

Question 1 / 270705eccefa2bacbc34ba4d47865

Question 1 of 270705eccefa2bacbc34ba4d47865

The fuel injection pump shown in the illustration, the position of the plunger would give maximum __________. See illustration MO-0063.

Back

Question 1 of 27070

The fuel injection pump shown in the illustration, the position of the plunger would give maximum __________. See illustration MO-0063.

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