What type of valves are located in the overhead valve train of a two-stroke diesel engine?

What type of valves are located in the overhead valve train of a two-stroke diesel engine?

• A. Exhaust
• B. Intake
• C. Check
• D. Relief

Answer: (A)

In a two-stroke diesel engine with an overhead valve arrangement, the valves in the head are responsible for letting the burnt gases out. The exhaust valve opens at the right time to vent combustion products as the piston completes its power stroke, which is essential for clearing the cylinder so fresh air can be drawn in for the next cycle. In many two-stroke designs, intake occurs through ports in the cylinder wall or is assisted by scavenging devices, not by an intake valve in the head, so the overhead train is dedicated to exhaust flow. Check valves and relief valves serve different purposes (preventing backflow and protecting against overpressure) and aren’t part of the normal exhaust/intake control in this context.

In a two-stroke diesel engine with an overhead valve arrangement, the valves in the head are responsible for letting the burnt gases out. The exhaust valve opens at the right time to vent combustion products as the piston completes its power stroke, which is essential for clearing the cylinder so fresh air can be drawn in for the next cycle. In many two-stroke designs, intake occurs through ports in the cylinder wall or is assisted by scavenging devices, not by an intake valve in the head, so the overhead train is dedicated to exhaust flow. Check valves and relief valves serve different purposes (preventing backflow and protecting against overpressure) and aren’t part of the normal exhaust/intake control in this context.