The modern car often driven by an internal combustion engine. Such engines, there are many. They differ in volume, number of cylinders, power, speed, use of fuel (diesel, petrol and gas ICE).
As the engine is running and what is called a four-stroke internal combustion engine? On the internal combustion clear. Inside the engine burns fuel. Why 4 cycles engine, what is it? Indeed, there are two-stroke engines. But cars are used rarely.
Four-stroke engine called because his work can be divided into four levels according to the time of. Piston held four times in the cylinder - half up and half down. Tact begins with finding the piston in the extreme top or bottom point. In the drivers-mechanics is called top dead center (TDC) and bottom dead center (NMT).
First time - time to the inlet
The first cycle, he's intake begins with TDC (top dead center). Moving down the cylinder piston sucks the fuel-air mixture. The work of this cycle is the open intake valve. By the way, there are many engines with multiple intake valves. Their number, size, time spent in the open state can significantly affect engine power. There are engines which, according to the press on the gas pedal, there is an increase in forced residence time of the intake valves open. This is done to increase the amount of fuel intake, which, after ignition, increases engine power. The car, in this case, can accelerate much faster.
The second time - compression stroke
The next cycle of the engine - the compression stroke. Once the piston reaches the lowest point, it begins to rise upwards, thus compressing the mixture in the cylinder got the beat intake. The fuel mixture is compressed to the volume of the combustion chamber. What is this such a camera? The free space between the top of the piston and the top of the cylinder stroke while in the top dead center called a combustion chamber. Valves in this cycle engine shut completely. The more tightly they are closed, the compression is better. Of great importance in this case, the state of the piston, cylinder, piston rings. If there are large gaps, you do not get good compression, and accordingly, the power of the engine will be much lower. Compression can check special device. The magnitude of compression can be concluded about the degree of wear of the engine.
The third time - stroke
The third time - work begins with TDC. The working he called accidental. It is in this cycle the action that makes the car move. In this cycle, the work enters ignition system. Why is this so-called system? And because it is responsible for igniting the fuel mixture in the cylinder is compressed in the combustion chamber. Compatibility is very simple - the system gives the spark of a candle. Please note that spark on the spark plug is issued a few degrees to reach the top of the piston. These degrees in modern engine automatically adjusted "intelligence" of the car. Once the fuel is lit, there is an explosion - it dramatically increases in volume, causing the piston to move down. Valves in this cycle of the engine, as in the previous year, are closed.
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| Downloads: 23 | ||||
| Updated At: 2024-03-28 11:29:32 | ||||
| Publisher: Happy Friday | ||||
| Operating System: Android | ||||
| License Type: Free |