Car Engine Piston Diagram
Introduction
A car engine piston is a cylindrical-shaped component that moves up and down within the engine’s cylinder. The piston’s primary function is to compress the air-fuel mixture and then force it out of the cylinder during the engine’s combustion cycle.
Pistons are typically made from lightweight materials such as aluminum or steel. They are designed to withstand the high temperatures and pressures generated within the engine’s combustion chamber.
Parts of a Piston
The main parts of a piston include the following:
- Crown: The top of the piston, which is exposed to the combustion gases.
- Skirt: The cylindrical-shaped portion of the piston that fits inside the cylinder.
- Ring grooves: Grooves machined into the piston’s skirt that house the piston rings.
- Wrist pin: A pin that connects the piston to the connecting rod.
Types of Pistons
There are two main types of pistons: flat-top pistons and domed pistons.
- Flat-top pistons: Have a flat crown surface. They are typically used in engines with a high compression ratio.
- Domed pistons: Have a raised crown surface. They are typically used in engines with a low compression ratio.
Function of a Piston
The piston plays a critical role in the engine’s combustion cycle. The following is a brief overview of the piston’s function:
- Intake stroke: The piston moves down the cylinder, drawing the air-fuel mixture into the cylinder.
- Compression stroke: The piston moves up the cylinder, compressing the air-fuel mixture.
- Power stroke: The spark plug ignites the air-fuel mixture, causing it to burn and expand. The expanding gases push the piston down the cylinder, generating power.
- Exhaust stroke: The piston moves up the cylinder, pushing the exhaust gases out of the cylinder.
Conclusion
The piston is a critical component of a car engine. It plays a vital role in the engine’s combustion cycle and helps to generate power.
