In the diesel engine illustrated, what part...

Question 1 / 2707066636eef28f7522a1c51f984

Question 1 of 2707066636eef28f7522a1c51f984

In the diesel engine illustrated, what part is under compression when firing is taking place in a particular cylinder? Illustration MO-0003

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Question 1 of 27070

In the diesel engine illustrated, what part is under compression when firing is taking place in a particular cylinder? Illustration MO-0003

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🔍 Key Concepts

• Force path in a large low-speed, crosshead diesel engine during the power stroke • Difference between members that are in tension vs in compression • Structural role of tie rods, piston rod, and attached fasteners in holding the engine together

💭 Think About

• Trace the gas pressure acting on the piston crown and follow how that load is transmitted down through the moving parts to the crankshaft—on which part is the load pushing, and on which parts is it pulling? • For each option, decide whether that component is mainly designed to resist compressive forces or tensile forces during firing. • Look at where the crosshead and piston rod meet in the illustration: when the piston is forced downward, which element is being squeezed, and which elements are being stretched to keep the structure together?

✅ Before You Answer

• Verify which component directly connects the piston/crosshead assembly to the crankshaft during the power stroke. • Check which parts (like long vertical rods) are specifically intended to hold the frame and bedplate together against upward firing loads—these are usually in tension, not compression. • Confirm that small items like nuts or lubrication devices are not primary load-carrying members under firing pressure but mainly serve retaining or lubricating functions.

Question 1 of 27070

In the diesel engine illustrated, what part is under compression when firing is taking place in a particular cylinder? Illustration MO-0003

Tie rod

Piston rod nut

Lubrication telescopes

Piston rod

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Question 1 / 2707066636eef28f7522a1c51f984

Question 1 of 2707066636eef28f7522a1c51f984

In the diesel engine illustrated, what part is under compression when firing is taking place in a particular cylinder? Illustration MO-0003

Back

Question 1 of 27070

In the diesel engine illustrated, what part is under compression when firing is taking place in a particular cylinder? Illustration MO-0003

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