Which valve is located in the overhead valve train of a two-stroke diesel engine?

Which valve is located in the overhead valve train of a two-stroke diesel engine?

• A. Exhaust
• B. Intake
• C. Pushrod
• D. Fuel

Answer: (A)

In an overhead valve arrangement, the valve train sits in the cylinder head and uses a cam, pushrods, and rocker arms to open and close valves. For many two-stroke diesel designs that use this head-mounted valve setup, the valve in the overhead train is the exhaust valve. It must open to expel the burned gases at the end of the power stroke and then close to allow the incoming scavenging air to fill the cylinder. In these engines, the intake is often handled by ports in the cylinder wall rather than an intake valve in the head, so the overhead train mainly governs the exhaust. A pushrod is a part of the mechanism, not a valve itself, and fuel is delivered by injectors, not a valve in the valve train.

In an overhead valve arrangement, the valve train sits in the cylinder head and uses a cam, pushrods, and rocker arms to open and close valves. For many two-stroke diesel designs that use this head-mounted valve setup, the valve in the overhead train is the exhaust valve. It must open to expel the burned gases at the end of the power stroke and then close to allow the incoming scavenging air to fill the cylinder. In these engines, the intake is often handled by ports in the cylinder wall rather than an intake valve in the head, so the overhead train mainly governs the exhaust. A pushrod is a part of the mechanism, not a valve itself, and fuel is delivered by injectors, not a valve in the valve train.