During the diesel engine power stroke, the...

🔍 Key Concepts

• Side thrust on a piston occurs because the connecting rod is not perfectly in line with the cylinder center line during most of the stroke • Think about how the crankshaft, crank pin, and connecting rod move in relation to the straight up‑and‑down motion of the piston • Side thrust is related to the geometry that makes the piston move linearly while the crankshaft moves in a circular path

💭 Think About

• Which engine parts actually touch the piston and can push it sideways against the cylinder wall? • When the crank is partway through the power stroke, what angle exists that would create a sideways component of force on the piston? • Which option describes an angle that changes during the stroke and could therefore create varying side thrust?

✅ Before You Answer

• Identify which option involves the piston’s linear motion directly (not just rotating parts away from the piston) • Confirm which angle would produce a sideways component of force on the piston, not just rotational torque in the crankshaft • Eliminate any options that do not involve the connecting rod–piston–cylinder relationship during the stroke

During the diesel engine power stroke, the side thrust developed on the piston is a result of the angle __________.

formed by the connecting rod and cylinder center line

of the bevel on the piston oil control rings

formed by the crank arm and crank pin

formed by the crank pin and flywheel

🔍 Key Concepts

💭 Think About

✅ Before You Answer