In a two-stroke/cycle, opposed piston,...

Question 1 / 205eccefa1bacbc34ba4d4739b

Question 1 of 205eccefa1bacbc34ba4d4739b

In a two-stroke/cycle, opposed piston, diesel engine, one crankshaft operates several crank angles in advance of the other crankshaft to __________.

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Question 1 of 20

5eccefa1bacbc34ba4d4739b

In a two-stroke/cycle, opposed piston, diesel engine, one crankshaft operates several crank angles in advance of the other crankshaft to __________.

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🔍 Key Concepts

• Opposed-piston two-stroke diesel timing – how two crankshafts are phased relative to each other • The sequence of scavenge (inlet) port and exhaust port opening and closing in a uniflow-scavenged engine • Why exhaust gases must leave the cylinder efficiently before fresh air is fully admitted

💭 Think About

• In an opposed-piston two-stroke, which ports do you generally want to open first: exhaust or scavenge/inlet, and why? • Think about the gas flow: how do you best clear (scavenge) the cylinder of burnt gases using the fresh air coming in? • If one crankshaft leads the other, what does that do to the timing of the pistons reaching their port-opening positions?

✅ Before You Answer

• Identify which ports are controlled by the leading crankshaft’s pistons (timed earlier). • Check which sequence gives effective scavenging: exhaust opening, then scavenge air admission, then exhaust closing, then scavenge closing. • Eliminate any option that would make exhaust and scavenge ports open and close exactly together, as that reduces control over gas flow.

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Question 1 of 20

In a two-stroke/cycle, opposed piston, diesel engine, one crankshaft operates several crank angles in advance of the other crankshaft to __________.

allow the exhaust ports to open and close before the inlet ports close

allow the scavenge ports to open and close simultaneously with the exhaust ports

prevent scavenge air pressure buildup in the cylinders

prevent the exhaust piston from reaching TDC and BDC before the intake piston

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Question 1 / 205eccefa1bacbc34ba4d4739b

Question 1 of 205eccefa1bacbc34ba4d4739b

In a two-stroke/cycle, opposed piston, diesel engine, one crankshaft operates several crank angles in advance of the other crankshaft to __________.

Back

Question 1 of 20

5eccefa1bacbc34ba4d4739b

In a two-stroke/cycle, opposed piston, diesel engine, one crankshaft operates several crank angles in advance of the other crankshaft to __________.

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