2-Stroke Engines Diagram Quiz

2-Stroke Engine Components and Processes

• Top Dead Center (TDC) is the position of the piston closest to the cylinder head, resulting in the smallest combustion chamber.
• Bottom Dead Center (BDC) is where the piston is farthest from the cylinder head, leading to the largest combustion chamber.
• The fuel/air mixture is an explosive combination of atomized fuel and air created in the carburetor, entering through the intake port or manifold.
• The spark plug ignites the fuel/air mixture within the combustion chamber of an internal combustion engine.
• Combustion refers to the burning process, specifically the explosion of the fuel/air mixture in the engine context.
• The engine block is a casement of iron or aluminum alloy that ensures proper alignment of all engine parts.
• The piston moves within the cylinder, driven by combustion, facilitating the rotation of the crankshaft.
• The crankcase houses the crankshaft and related internal components, drawing in the fuel/air mixture before combustion.
• Combustion chambers are enclosed spaces in the engine where the burning of the mixture occurs, located between the piston and cylinder head.
• The intake port is where the fuel/air mixture enters the crankcase in 2-cycle engines.

Engine Functionality

• The exhaust port allows spent gases to exit the engine in 2-cycle engines.
• The connecting rod links the piston to the crankshaft, transferring the piston’s vertical motion into rotational movement at the crankshaft.
• Transfer ports enable the fuel/air mixture to pass from the crankcase into the combustion chamber in 2-cycle engines.
• The intake/compression stroke occurs as the piston moves from BDC to TDC, creating negative pressure in the crankcase and drawing in the fuel/air mixture while compressing it in the combustion chamber.
• The power/exhaust stroke happens when the piston travels from TDC to BDC, igniting the mixture and forcing the piston down, also uncovering the exhaust port to release gases.
• Ignition is the process of starting combustion, initiated by the spark plug lighting the fuel/air mixture in the combustion chamber.
• The crankshaft is crucial for converting the piston’s reciprocating motion into circular motion.
• The fuel/air/oil mixture is drawn into the crankcase, then into the combustion chamber, where it explodes to produce piston movement.
• Oil is added to the fuel to lubricate a 2-cycle engine, ensuring proper function and reducing wear.