SV Technocrats India is India's leading engine cut section model manufacturing company from Pune. SV Technocrats India's Cut section model of single cylinder two stroke petrol engine helps learners to understand its integral parts and functionality. A cut section model of a single-cylinder two-stroke petrol engine would reveal the internal components and illustrate how the engine operates. Here's a detailed description of the key parts that would be visible in the cut section model:

Key Components of a Single Cylinder Two-Stroke Petrol Engine Cut Section Model

1. Cylinder:

o Description: The chamber where the combustion process occurs.

o Function: Contains the fuel-air mixture and the combustion process.

2. Piston:

o Description: The moving component within the cylinder.

o Function: Moves up and down to compress the fuel-air mixture and convert combustion energy into mechanical energy.

3. Crankshaft:

o Description: The rotating shaft that converts the piston's reciprocating motion into rotational motion.

o Function: Drives the connected machinery or vehicle.

4. Connecting Rod:

o Description: The rod that connects the piston to the crankshaft.

o Function: Transmits the motion from the piston to the crankshaft.

5. Spark Plug:

o Description: The device that ignites the fuel-air mixture in the cylinder.

o Function: Provides the spark necessary for combustion.

6. Intake Port:

o Description: The opening through which the fuel-air mixture enters the cylinder.

o Function: Allows the fresh charge to enter the combustion chamber.

7. Exhaust Port:

o Description: The opening through which exhaust gases exit the cylinder.

o Function: Allows the burnt gases to escape from the combustion chamber.

8. Reed Valve:

o Description: A one-way valve located at the intake port.

o Function: Prevents the backflow of the fuel-air mixture.

9. Crankcase:

o Description: The housing for the crankshaft and other lower engine components.

o Function: Acts as a reservoir for the fuel-air mixture and helps in the scavenging process.

10. Transfer Port:

o Description: The passage that connects the crankcase to the cylinder.

o Function: Allows the fresh charge from the crankcase to enter the combustion chamber.

Working Principle

First Stroke (Intake and Compression)

• The piston moves upward from the bottom dead center (BDC) to the top dead center (TDC).

• As the piston moves up, it compresses the fuel-air mixture in the cylinder.

• At the same time, a vacuum is created in the crankcase, drawing a fresh charge of fuel-air mixture through the reed valve.

Second Stroke (Power and Exhaust)

• Near TDC, the spark plug ignites the compressed fuel-air mixture, causing an explosion that pushes the piston down.

• As the piston moves down, the exhaust port opens, allowing the burnt gases to escape.

• Simultaneously, the transfer port opens, and the fresh charge from the crankcase is pushed into the cylinder.

• The cycle repeats with the next upward stroke of the piston.