How does the engine work? How does the engine work?

1) The four-stroke gasoline engine mixes air and gasoline in a certain proportion to form a good mixture of automobile engines. In the intake stroke, the mixture is sucked into the cylinder, and the mixture is compressed, ignited, and burned to produce heat energy. The high-temperature and high-pressure gas acts on the top of the piston to promote the piston to do linear reciprocating motion, and the mechanical energy is output outward through the connecting rod, crankshaft and flywheel mechanism.

A four-stroke gasoline engine completes a duty cycle in the intake stroke, compression stroke, power stroke and exhaust stroke. (2) The intake stroke piston is driven by the crankshaft and moves from the top dead center to the bottom dead center. At this point, the intake valve opens, the exhaust valve closes, and the crankshaft rotates 180°.

During the movement of the piston, the volume of the cylinder gradually increases, the gas pressure in the cylinder gradually decreases from PR to PA, and a certain degree of vacuum is formed in the cylinder. The mixture of air and gasoline is sucked into the cylinder through the intake valve and further mixed inside the cylinder to form a combustible mixture. Due to the resistance of the intake system, at the end of the intake, the gas pressure in the cylinder is less than the atmospheric pressure p0, i.e., pa=(.

The temperature of the combustible mixture entering the cylinder rises to 340 400 K due to the heating of high-temperature components such as the intake pipe, cylinder wall, piston top, valve, combustion chamber wall, etc., as well as mixing with residual exhaust gases. (3) Compression strokeIn a compression stroke, the intake and exhaust valves are closed at the same time. The piston moves from bottom dead center to top dead center, and the crankshaft rotates 180°.

As the piston moves upwards, the working volume gradually decreases, and the pressure and temperature rise as the mixture in the cylinder is compressed. When the compression ends, the pressure PC can reach 800 2000kpa, and the temperature can reach 600 750k(4) power stroke When the piston is close to the top dead center, the spark plug ignites the combustible mixture, and the mixture combustion releases a large amount of heat energy, so that the pressure and temperature of the gas in the cylinder rise rapidly. The maximum combustion pressure pz is 3000 6000kpa, the temperature tz is 2200 2800k·k, and the high-pressure gas pushes the piston to move from the top dead center to the bottom dead center, and outputs mechanical energy through the crank connecting rod mechanism.

As the piston moves downwards, the volume of the cylinder increases, and the gas pressure and temperature gradually decrease. When point B is reached, the pressure drops to 300 500kPa, the temperature drops to 1200 1500kK, and in the power stroke, the intake and exhaust valves are closed, and the crankshaft rotates 180 °. (5) Exhaust strokeIn the exhaust stroke, the exhaust valve is opened, the intake valve is still closed, the piston moves from the bottom dead center to the top dead center, and the crankshaft rotates 180°.

When the exhaust valve is opened, the combustion exhaust gases are discharged outside the cylinder under the pressure difference between the inside and outside of the cylinder on the one hand, and outside the cylinder by the extrusion action of the piston on the other hand. Due to the drag of the exhaust system, the pressure at the exhaust end r is slightly higher than the atmospheric pressure, i.e., pr=(. Exhaust temperature tr = 900 1100k

When the piston moves to the top dead center, there is still a certain volume of exhaust gases in the combustion chamber that cannot be discharged. This part of the exhaust gas is called residual exhaust gas.

The working cycle of a four-stroke gasoline engine consists of 4 piston strokes, namely intake stroke, compression stroke, work stroke and exhaust stroke.

Intake stroke. The intake valve is opened, the exhaust valve is closed, the piston moves from the top dead center to the bottom dead center, the cylinder volume above the piston increases, the vacuum degree is generated, the pressure in the cylinder drops below the intake pressure, and under the action of vacuum suction, the gasoline atomized through the carburetor or gasoline injection device is mixed with air to form a combustible mixture, which is sucked into the cylinder by the intake tract and the intake valve. The intake process continues until the piston passes the dead center and the intake valve closes.

Then the ascending piston begins to compress the gas.

Compression stroke. The intake and exhaust valves are all closed, the combustible mixture in the cylinder is compressed, the temperature of the mixture rises, and the pressure rises. Before the piston approaches the top dead center, the pressure of the combustible mixture rises to about 0 6 1 2MPa, and the temperature can reach 330 430.

Work trips. As the compression stroke approaches the top dead center, the spark plug mounted above the cylinder head emits an electric spark that ignites the compressed flammable mixture. After combustible mixture combustion, a large amount of heat is released, and the gas pressure and temperature in the cylinder rise rapidly, the maximum combustion pressure can reach 3 6MPa, and the maximum combustion temperature can reach 2 200 2 500.

The high-temperature and high-pressure gas pushes the piston to move rapidly to the dead center, and works externally through the crank connecting rod mechanism. At the beginning of the work stroke, the intake and exhaust valves are closed.

Exhaust stroke. When the power stroke is near the end, the exhaust valve opens, because the pressure in the cylinder is higher than the atmospheric pressure at this time, the high-temperature exhaust gas is quickly discharged from the cylinder, this stage belongs to the free exhaust stage, and the high-temperature exhaust gas is discharged through the exhaust valve at the local sound speed. With the exhaust process to enter the forced exhaust stage, the piston moves over the bottom dead center to the top dead center, and the exhaust gas in the cylinder is forcibly discharged, and the exhaust process ends when the piston reaches the vicinity of the top dead center.

At the end of the exhaust, the gas pressure in the cylinder is slightly higher than the atmospheric pressure, about 0 105 0 115MPa, and the exhaust gas temperature is about 600 900. Because the combustion chamber occupies a certain volume, it is impossible to completely remove the exhaust gas at the end of the exhaust, and the remaining part of the exhaust gas is called residual exhaust gas.

The four-stroke gasoline engine completes a working cycle through four strokes of air intake, compression, work and exhaust, in which the piston reciprocates up and down four strokes, and the corresponding crankshaft rotates for two weeks.

The principle of the engine is: the four-stroke gasoline engine is to mix air and gasoline into a good mixture in a certain proportion, which is sucked into the cylinder in the suction stroke, and the mixture is burned by compression ignition to produce heat energy, and the high-temperature and high-pressure gas acts on the top of the piston to promote the piston to reciprocate linear motion, and outputs mechanical energy through the connecting rod and crankshaft flywheel mechanism. ”

What is the principle of this engine?

The working principle is divided into, air intake, compression, work, and exhaust.

Hello, dear! The working principle of the automobile V-type engine is to divide all cylinders into two groups, and arrange the adjacent cylinders together at a certain angle, so that the two groups of cylinders form two planes with an angle, and the cylinders are V-shaped from the side, so it is called a V-shaped engine.

1. The height and length of the V-shaped engine are small, and it is more convenient to arrange them on the car. In particular, modern automobiles pay more attention to aerodynamics, requiring the car to have as small a windward side as possible, that is, the lower the engine cover, the better.

Common V-engines are V6, V8, V10, and V12. There are also V3, V5 and V16 (not to be confused with some in-line engines that represent valve counts).

2. V represents that the engine cylinders are arranged in a V-shape, which is generally 90 degrees, which can offset the vibration during operation and is more stable. There are also 75 degrees and 72 degrees. Renault even uses a wide-angle V10 engine of more than 90 degrees.

3. Advantages: stable operation (for V6, V8, V12), space saving.

What is the principle of this engine?

Look at this, I don't know if you understand.

The working principle is divided into, air intake, compression, work, and exhaust.

Taking the four-stroke engine as an example, the working principle is as follows, the intake stroke: the intake valve is opened, the exhaust valve is closed, the piston moves from the top dead center to the bottom dead center Compression stroke: the intake valve is closed, the exhaust valve is closed, and the piston moves from the bottom dead center to the top dead center to do the work stroke:

The intake valve is closed, the exhaust valve is closed, the piston moves from top dead center to bottom dead center Exhaust stroke: the intake valve is closed, the exhaust valve is opened, and the piston moves from bottom dead center to top dead center.

The working principle of the engine is that internal energy is converted into mechanical energy.

2. Engine is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. For example, the internal combustion engine usually converts chemical energy into mechanical energy. An engine applies to both a power generation unit and an entire machine including a power unit (e.g

gasoline engines, aero engines). The engine was first born in England, so the concept of the engine also originated from the English language, and its original meaning refers to the "mechanical device that produces power".

3. The external combustion engine, that is, its fuel is burned on the outside of the engine, was developed in 1816 by R. of ScotlandInvented by Stirling, it is also known as the Stirling engine. The engine converts the heat energy generated by this combustion into kinetic energy, and Watt's improved steam engine is a typical external combustion engine, when a large amount of coal combustion produces heat energy to heat water into a large amount of water vapor, high pressure is generated, and then this high pressure pushes the machinery to do work, thus completing the conversion of heat energy to kinetic energy.

4. If you understand what an external combustion engine is, you will also know what an internal combustion engine is. The main difference between an internal combustion engine and an external combustion engine is that its fuel is burned inside. There are many types of internal combustion engines, and the common gasoline engines and diesel engines are typical internal combustion engines.

Hello! Glad to answer for you, the engine works as follows1The working principle of the engine is the conversion of internal energy into mechanical energy, and it is a machine that can convert other forms of energy into mechanical energy.

Engines include: internal combustion engine, external combustion engine, steam engine, jet engine, electric motor. The original meaning of engine refers to the mechanical device that produces power.

The engine is suitable for both the power generation unit and the entire machine including the power unit. The main difference between the internal combustion engine and the external combustion engine is that the fuel is inside. The common internal combustion engine is gasoline engine and diesel engine, the body is the skeleton of the engine, is the installation foundation of various institutions and systems, and all the main parts and accessories of the engine are installed inside and outside, and the body must have sufficient strength.

Summary. Engine, here mainly refers to the internal combustion engine. Its working principle mainly includes four strokes, namely the intake stroke, the compression stroke, the power stroke, and the exhaust stroke. How does the engine work?

How does the engine work?

Engine, here mainly refers to the internal combustion engine. Its working principle mainly includes four strokes, namely the intake stroke, the compression stroke, the power stroke, and the exhaust stroke. How does the engine work?

1. Air intake: As the first stroke, this is mainly the process from the dead center of the piston on the cylinder to the bottom dead center. 2. Compression:

When the piston moves, the intake exhaust valve closes and compresses the intake air, resulting in a high temperature. 3. Work done: Driven by the starter, the crankshaft will drive the piston, so as to carry out this reciprocating movement.

Wait until the cylinder does the work, and then it can work on its own. 4. Exhaust: The exhaust stroke is different from the first stroke, this is mainly the process from the bottom dead center to the upper dead center, and then the waste after combustion will be discharged out of the cylinder, the exhaust valve is opened, and the intake valve is still closed.

That's how it works.

The engine is generally a four-stroke, and its working principle includes an intake stroke, a compression stroke, a power stroke and an exhaust stroke. Most car engines are four-strokes.

The working cycle of a four-stroke gasoline engine consists of four piston strokes, namely the intake stroke, the compression stroke, the power stroke and the exhaust stroke.

1.Intake stroke.

When the intake valve is opened and the exhaust valve is closed, the piston moves from the top dead center to the bottom dead center, and the cylinder volume above the piston increases, resulting in a vacuum, and the pressure sock force in the cylinder drops below the intake pressure. Under the action of vacuum suction, the gasoline atomized by a carburetor or gasoline injection device is mixed with the air to form a combustible mixture, which is sucked in by the air intake and intake valves. The intake process continues until the piston passes the bottom dead center and the intake valve closes.

Then the upward piston begins to compress the gas.

2.Compression stroke.

All intake and exhaust valves are closed, the combustible mixture inside the cylinder is compressed, and the temperature and pressure of the mixture rise. Before the top dead center of the piston, the pressure of the combustible mixture rises to about 330 430.

3.Work itinerary.

As the compression stroke approaches the top dead center, a spark plug mounted above the cylinder head emits an electrical spark that ignites the compressed combustible mixture. After combustible mixture combustion, a large amount of heat is released, and the gas pressure and temperature in the cylinder rise rapidly, with a maximum combustion pressure of 3 6MPa and a maximum combustion temperature of 2200 2500. The high-pressure gas pushes the piston to move rapidly to the bottom dead center, and does external work through the crank connecting rod mechanism.

At the beginning of the working stroke, the intake and exhaust valves are closed.

4.Exhaust stroke.

At the end of the working stroke, the exhaust valve opens. Since the pressure in the cylinder is higher than the atmospheric pressure at this time, the hot exhaust gases are quickly discharged from the cylinder. This stage is the free exhaust phase, where the hot exhaust gases are discharged through the exhaust valve at local sound speed.

As the exhaust process progresses, it enters the forced exhaust stage, and the piston moves beyond the bottom dead center to reach the top dead center, forcing the exhaust gas in the cylinder to be discharged. When the piston reaches the vicinity of the top dead center, the venting process ends.

The four-stroke gasoline engine completes a work cycle through four strokes: air intake, Shenling compression, work and exhaust. In this process, the piston reciprocates up and down four strokes, and the corresponding crankshaft rotates twice.

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