As shown in the illustration of the fuel...

Question 1 / 2707066636eef28f7522a1c52026e

Question 1 of 2707066636eef28f7522a1c52026e

As shown in the illustration of the fuel injection pump, the function of the area designated as "L" is to __________. Illustration MO-0061

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Question 1 of 27070

As shown in the illustration of the fuel injection pump, the function of the area designated as "L" is to __________. Illustration MO-0061

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

🔍 Key Concepts

• Relationship between the plunger helix (M) and the port at L in a jerk-type fuel injection pump • How uncovering the spill/recirculation port affects the start and end of injection • Difference between controlling quantity/timing of injection and simply relieving pressure at the injector

💭 Think About

• Trace the fuel path: when the plunger moves up and covers the inlet, where can fuel escape once the helix uncovers the port at L? • Ask yourself: does the feature at L act on the injector nozzle directly, or does it change pressure inside the pump barrel by opening a return path? • Which choice best matches the function of a spill port that is opened and closed by rotating the plunger helix?

✅ Before You Answer

• Identify that L is a port in the pump barrel that is opened/closed by the plunger helix M, not a spring or nozzle component • Confirm whether this port connects back to a low‑pressure side or return passage, rather than to the injector outlet line • Eliminate options that describe functions belonging to nozzle valves or separate relief devices, not to a control/spill port in the pump barrel

Question 1 of 27070

As shown in the illustration of the fuel injection pump, the function of the area designated as "L" is to __________. Illustration MO-0061

allow excess fuel oil to return to the fuel oil system

control the fuel injection rate

provide for plunger lubrication

relieve excessive injector discharge pressure

Question 1 / 2707066636eef28f7522a1c52026e

Question 1 of 2707066636eef28f7522a1c52026e

As shown in the illustration of the fuel injection pump, the function of the area designated as "L" is to __________. Illustration MO-0061

Back

Question 1 of 27070

As shown in the illustration of the fuel injection pump, the function of the area designated as "L" is to __________. Illustration MO-0061

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