Low compression pressure in a diesel engine...

Question 1 / 270705eccefa1bacbc34ba4d47566

Question 1 of 270705eccefa1bacbc34ba4d47566

Low compression pressure in a diesel engine can be caused by __________.

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Question 1 of 27070

Low compression pressure in a diesel engine can be caused by __________.

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🔍 Key Concepts

• compression pressure vs. combustion pressure in a diesel engine • How valve seating and piston/cylinder sealing affect compression • Which items affect pressure during compression stroke vs. during combustion only

💭 Think About

• Ask yourself: Which option would allow air to leak out of the cylinder while the piston is compressing the air? • Which choice mainly affects how fuel burns (power and efficiency) rather than how much air gets compressed? • Think about whether each choice changes the sealing of the combustion space when the valves are supposed to be closed.

✅ Before You Answer

• For each option, decide if it directly affects sealing of the compression space (valves, rings, liner/cylinder interface). • Separate causes that change timing of fuel injection from those that change the volume or leakage of compressed air. • Consider whether carbon deposits on the piston would reduce or increase the clearance volume and how that would influence compression pressure.

Question 1 of 27070

Low compression pressure in a diesel engine can be caused by __________.

improperly seating intake valves

leaking cylinder liner seal rings

late fuel injection timing

carbon deposits on the piston

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