4F30.40 • Two Stroke Diesel Engine

Photo of University of Texas at Austin's Demonstration

Instructions / Notes:

• Demo Staff: This demo shows the cross section and operating principles of an air cooled two stroke Diesel engine, based on diesel cycle.
• Very high power Diesel engines used for ship propulsion are commonly two stroke engines.
• All engines between 400-900mm bore are two stroke engines.
• Rotate the hand crank at the back of the model in any direction to simulate the intake, compression and exhaust stages of the engine.
• A simulated spark plug uses a small LED lamp to indicate ignition triggered by air pressure.
• The air is sucked through spring loaded inlet valve when the pressure in the crankcase reduces due to upward motion of piston during compression stroke.
• During the expansion stroke the air in the crankcase is compressed.
• Near the end of the expansion stroke piston uncovers the exhaust ports and the cylinder pressure drops to atmospheric as the combustion product leave the cylinder.

Last updated on September 16, 2022