What is the working principle of 4 stroke diesel engine?

What is the working principle of 4 stroke diesel engine?

What Are the Strokes of a 4-Cycle Engine? At the end of the compression (previous) stroke, the spark plug fires and ignites the compressed air/fuel mixture. This ignition/explosion forces the piston back down the cylinder bore and rotates the crankshaft, propelling the vehicle forward.

What is the four stroke principle?

An internal-combustion engine goes through four strokes: intake, compression, combustion (power), and exhaust. As the piston moves during each stroke, it turns the crankshaft.

What are the four stroke of a diesel engine?

Two-stroke and four-stroke engines As noted earlier, diesel engines are designed to operate on either the two- or four-stroke cycle. In the typical four-stroke-cycle engine, the intake and exhaust valves and the fuel-injection nozzle are located in the cylinder head (see figure).

What is the working principle of two stroke engine?

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 difference between 2 stroke and 4 stroke?

In a 2-stroke engine, all five functions of the cycle are completed in only two strokes of the piston (or one revolution of the crankshaft). In a 4-stroke engine, the five functions require four strokes of the piston (or two revolutions of the crankshaft).

What is the principle of two stroke engine?

As the name implies, the two stroke engine only requires two piston movements (one cycle) in order to generate power. The engine is able do produce power after one cycle because the exhaust and intake of the gas occurs simultaneously, as seen in Figure 1.

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 is 4-stroke marine diesel engine?

The four-stroke cycle is completed in four strokes of the piston, or two revolutions of the crankshaft. The engine is made up of a piston which moves up and down in a cylinder which is covered at the top by a cylinder head. …

How does a four stroke diesel engine work?

In a four-stroke, diesel cycle compression ignition engine, the four strokes are as follows: During suction stroke, the piston moves down from the top dead centre position. Air is sucked into the cylinder through the open inlet valve which closes at the end o f the stroke. The exhaust valve remains closed during this stroke.

Which is the first stroke of the Diesel cycle?

Diesel Cycle 1 Suction Stroke. During suction stroke, the piston moves down from the top dead centre position. 2 Compression Stroke. The piston moves upwards from the bottom dead centre position. 3 Working Stroke or Power Stroke. 4 Exhaust Stroke.

How does the compression stroke of a diesel engine work?

At the end of the compression stroke when the piston is at the top end of the cylinder a metered quantity of diesel is injected into the cylinder by the fuel injector. The heat of compressed air ignites the diesel fuel and generates high pressure which pushes down the piston.

When does the suction stroke occur in a diesel engine?

The suction step is also called intake stroke, that is the process of entering the air into the cylinder chamber. This air intake occurs when the piston moves down from TDC (top dead center) to BDC (bottom dead center). This movement will increase the volume in the engine cylinder.