How 2 Stroke Engines Work

How 2 Stroke Engines Work - Vehicle engines that are widely used are gasoline engines and diesel engines, where the way gasoline and diesel engines work has various differences. For the gasoline engine itself, based on the working principle, it is divided into 2 types, namely 2 stroke gasoline engines and 4 stroke gasoline engines and of course the diesel engine is divided into 2 stroke diesel engines and 4 stroke diesel engines.

How does a 2 ak and 4 diesel engine work will not be discussed in another article, now we will focus first on how a 2 stroke gasoline engine works.

The 2-stroke motorbike is identical to the white smoke, aka the motor that is bubbling and accompanied by a noisy exhaust sound. Why can't a 2 stroke motor do that? different from the new motorcycles that are more environmentally friendly and less noisy.

Ok, in this article we will discuss all about 2 stroke motors, why is it called a 2 stroke motor and how does this 2 ak engine work?

So the word "Tak" here is a term used to determine the number of steps during one working cycle of a machine (motor). 2 stroke motor means the motor requires 2 strokes of the piston to do 1 cycle of work.

Previously, you must first know that vehicles on the market today are rarely found vehicles that use 2-stroke engines. Why is that?

This is related to the regulations applied regarding air pollution and pollution thresholds. Where we know that 2 stroke engine vehicles are very environmentally friendly, air pollution and noise pollution make the production of 2 engine vehicles discontinued.

How 2 Stroke Engines Work

Step 1. Suction and Compression Stroke

The piston moves from BDC to TDC. In this process, fuel and air will enter (sucked into the crankcase) due to a vacuum in the crank chamber. Where when passing through the intake and exhaust holes, the piston will compress the gas contained in the combustion chamber. This compression process will continue until the piston is at TDC. However, a few degrees before TDC the spark plug will spark and ignite the compressed air and fuel mixture.

The ignition timing of the spark plug is set to a few degrees before TDC is intended so that the peak pressure due to combustion in the combustion chamber can occur when the piston begins to move from TDC to BDC, because empirically the combustion process takes time to make the gas burn completely by the spark plug flame.

Simply put, this stroke consists of 2 events, namely those that occur above the piston and below the piston, as follows:

Above the Piston

• End of fuel intake into the combustion chamber
• There is a process of compression and combustion of the fuel and air mixture by the spark plug

Under the Piston

• There is a step of entering the fuel and air mixture from the carburetor into the crankshaft chamber

Step 2. Combustion and Exhaust Stroke

The piston will move from TDC to BDC, in this process the piston will compress the rinse chamber underneath. At a certain point the piston will pass through the exhaust hole, and at this time the gas from the combustion process contained in the combustion chamber will exit through the exhaust hole.

Furthermore, when the piston passes through the intake hole, the compressed gas in the rinse chamber will be pumped into the combustion chamber while pushing the remaining combustion gases in the combustion chamber out through the exhaust hole. In this condition the piston will continue to move down to BDC while pumping all the air and fuel mixture in the rinse chamber to the combustion chamber.

Simply put, this stroke also consists of 2 events, namely those that occur above the piston and below the piston, as follows:

Above the Piston

• There are steps of effort, exhaust and the beginning of the entry of the fuel mixture into the combustion chamber.

Under the Piston

• There is a compression stroke in the air and fuel mixture in the crankcase to be supplied to the combustion chamber.

In a 2-stroke engine the combustion process does not occur perfectly, with the resulting emission levels in the high category. This relates to the use of side oil. Side oil on a 2 stroke motor serves to lubricate the components inside the engine. However, this oil will also burn with the fuel which will cause smoke in the exhaust. In addition, the combustion process that occurs every 2 steps makes fuel consumption higher (wasteful of fuel).

The discussion above is a glimpse of how a 2-stroke engine works on a gasoline motor, how do the steps work on a diesel motor? actually the principle is the same because they both belong to the category of internal combustion engines, but the way the fuel is detonated is different.

If in a gasoline engine a mixture of air and fuel will be exploded by the flame produced by the spark plug. Whereas in diesel engines, the mixture of air and fuel will burn itself (self ignition) due to the high compression ratio.