Oil control rings used in two-stroke/cycle...

Question 1 / 270705eccefa1bacbc34ba4d4754e

Question 1 of 270705eccefa1bacbc34ba4d4754e

Oil control rings used in two-stroke/cycle diesel engines are located near the bottom of the piston skirt in order to __________.

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Question 1 of 27070

Oil control rings used in two-stroke/cycle diesel engines are located near the bottom of the piston skirt in order to __________.

🔍 Key Concepts

• oil control ring function in any diesel engine • how two-stroke cylinder liners are ported for intake/exhaust • what happens if too much lubricating oil reaches the port belt and combustion space

💭 Think About

• Picture the piston moving past the intake and exhaust ports in a two‑stroke engine. What would you most want those lower rings to do as they travel over that port area? • Think about the primary job of an oil control ring versus compression rings. Is it mainly to support load, to seal compression, or to manage oil distribution? • Which choice describes a consequence that would be especially bad in a two‑stroke, where ports are in the liner rather than valves in the head?

✅ Before You Answer

• Identify which options focus on oil quantity and location control, not on load carrying or cushioning forces • Consider which answer directly addresses ports and gas exchange, a key difference between two‑stroke and four‑stroke designs • Eliminate any option that mainly describes a compression ring function instead of an oil control ring task

Question 1 of 27070

Oil control rings used in two-stroke/cycle diesel engines are located near the bottom of the piston skirt in order to __________.

increase the liner area covered by the oil film

maintain an oil film on the lower liner where scuffing is prevalent

keep excess oil away from intake and exhaust ports

help cushion piston skirt side thrust by providing a hydrodynamic oil wedge

Question 1 / 270705eccefa1bacbc34ba4d4754e

Question 1 of 270705eccefa1bacbc34ba4d4754e

Oil control rings used in two-stroke/cycle diesel engines are located near the bottom of the piston skirt in order to __________.

Back

Question 1 of 27070

Oil control rings used in two-stroke/cycle diesel engines are located near the bottom of the piston skirt in order to __________.