Overall, a two-stroke engine contains two processes: Compression stroke: The inlet port opens, the air-fuel mixture enters the chamber and the piston moves upwards compressing this mixture. A spark plug ignites the compressed fuel and begins the power stroke.
What is the working principle of petrol engine?
In a spark ignition engine, the fuel is mixed with air and then inducted into the cylinder during the intake process. After the piston compresses the fuel-air mixture, the spark ignites it, causing combustion. The expansion of the combustion gases pushes the piston during the power stroke.
What is the working principle of four stroke petrol engine?
The principle used in a four stroke petrol engine is commonly known as Otto Cycle. It states that there would be one power stroke for every four strokes. Such engines use a spark plug which is used for the ignition of the combustible fuel used in the engine. Most of the cars, bikes and trucks use a 4 stroke engines.
What is the application of 2 stroke petrol engine?
Two-stroke engines are still found in a variety of small propulsion applications, such as outboard motors, small on- and off-road motorcycles, mopeds, scooters, tuk-tuks, snowmobiles, go-karts, ultralight and model airplanes.
What is the working principle of carburetor?
The carburetor works on Bernoulli’s principle: the faster air moves, the lower its static pressure, and higher the dynamic pressure is. The throttle (accelerator) linkage does not directly control the flow of liquid fuel.
What is the difference between two-stroke and four stroke engine?
The main difference between a 4-stroke engine and a 2-stroke engine is that a 4-stroke engine goes through four stages, or two complete revolutions, to complete one power stroke, while a 2-stroke engine goes through 2 stages, or one complete revolution, to complete one power stroke.
What is the principle of engine?
Internal combustion heat engines work on the principle of the ideal gas law: . Raising the temperature of a gas increases the pressure that makes the gas want to expand. An internal combustion engine has a chamber, which has fuel added to it which ignites in order to raise the temperature of the gas.
What are the 2 strokes in a 2 cycle engine?
In a 2-stroke engine, the entire combustion cycle is completed with just one piston stroke: a compression stroke followed by the explosion of the compressed fuel. During the return stroke, the exhaust is let out and a fresh fuel mixture enters the cylinder.
What is special about 2-stroke oil?
A 2-stroke oil will lubricate the engine components by association with the fuel (either by mixing with it or by spraying during combustion), so this oil contains components that promote its combustion.
How do reed valves work?
Reed valve allows the mixture to move in only one direction – from the carburetor to the crankcase. It prevents the mixture from moving back to the carburetor. In the effect reed valve improves reloading of the combustion chamber with fresh air-fuel mixture. This improves power output of modern two stroke engines.
What is 2-stroke fuel?
What is 2 stroke fuel? Two stroke fuel is basically unleaded petrol mixed with 2 stroke oil. The oil to fuel mix ratio should be specified in your engines instruction manual. The oil in 2 stroke fuel is extremely important in lubricating your engine as two stroke engines do not have an internal oil reservoir.
What are the 3 types of carburetors?
There are three types of carburetors according to the direction in which the mixture is supplied.
- Up-draft carburetor.
- Horizontal type carburetor.
- Down-draft type carburetor.
What is principle and drawbacks of a simple carburetor?
In this carburetor, the air-fuel mixture totally depends upon the position of the throttle valve. … The main limitation or disadvantage of a simple carburetor is that when speed is too low, we get a strong mixture which causes trouble in the ignition of the mixture.