Eaton Char-Lynn Motor – Four Phases Of Motor Operation

The engine is like a human heart. Maybe someone will ask, in this case, how is the engine formed? How does it work? Let us approach the engine and take a look at it. The answer is naturally clear. It is.

Today’s cars, motorcycles, etc. mostly use internal combustion engines. The internal combustion engine is a heat engine. It is characterized by the combustion of liquid or gaseous fuel inside the machine to generate heat energy, which is then converted into mechanical energy to provide the car, which becomes the driving force of the car. . Take our common car engine, it is a four-stroke reciprocating piston engine.

Eaton Char-lynn Motor    : Let’s first say “piston”. This one should not be difficult to understand. Have you seen a pump? The pump relies on it to work. In fact, the piston working principle of the car engine is similar to the basic principle of the pump; “Reciprocating” means repeating back and forth. The pump does not rely on the piston to move back and forth to basketball or football. Finally, look at the “stroke”. You only need to use the pump to know that the piston is pushed from this head to the other. At one end, that is, the entire path of the piston, the piston completes the stroke and completes a stroke (it can be said that one stroke is completed). Although the engine is not used for pumping, the piston movement is similar. However, the engine has to complete one working cycle, which is two more strokes than the pump. If you are not too clear about these concepts at the moment, let’s take the gasoline engine as an example to explain the basic working principle of the engine. After we understand how it works, we will understand.

First of all, we should know that the engine is to power the car. What is the source of its power? It is fuel. The most common one is gasoline and diesel. Now because the world is facing the energy crisis and environmental protection, other fuels such as Natural gas, methane, alcohol, and hydrogen have also been used as power sources. Common sense tells us that if the fuel burns naturally in the air, it emits far enough energy to drive a car. In order to solve this problem, we need to atomize the fuel and then compress it to make it under high pressure. Burning, you can get instant high power, which will drive the car. In order to understand this process, we simply divide the working process of the engine into four stages, which corresponds to four strokes (intake, compression, work, exhaust).

The first stage is “intake”: in order to facilitate combustion, the gasoline first needs to be atomized outside the cylinder and mixed with air (we call this mixed gas “mixed gas”). When the intake valve is opened, As the piston moves downward from the top of the cylinder, the pressure in the cylinder becomes smaller and smaller, and the mixture enters the cylinder under the influence of the internal and external pressure difference. When the piston moves to the lower end, the intake stroke ends. The intake valve is closed.

The second phase is “compression”: when the intake valve is closed, the piston begins to move upwards, compressing the mixture in the cylinder to prepare for the subsequent combustion, and when the piston moves to the top of the cylinder, the compression stroke ends. During this process, both the intake and exhaust valves are closed.

The third stage is “doing work”: when the piston moves to the top of the cylinder, the mixture has become a high-pressure, high-temperature gas. At this time, the ignition device (spark plug) will ignite them, and the mixture will start to burn violently. The powerful energy that it erupts pushes the piston down to power the car. During this process, both the intake and exhaust valves are closed.

The fourth stage is “exhaust”: when the burning gas pushes the piston to the bottom, it has no energy to be released again, then the exhaust valve will open, and then the piston begins to move upward again, after combustion The exhaust gas is exhausted from the cylinder. When the piston reaches the top of the cylinder, the exhaust gas is discharged almost. At this time, the exhaust valve is closed, so that one working cycle is over. At the same time, the intake valve opens and the piston moves downwards, starting a new working cycle.

Do you have any questions about the working principle of the engine? Yes, everyone must know how the piston moves when the fuel has not burned. When we turn the car key to start the car, we turn on the start. Machine (motor), which will move the piston to perform the working cycle as described above to start the normal operation of the engine.

Understand the basic working principle of the engine, let’s look at its basic structure, we still take the gasoline engine as an example. Although the structure of the engine is relatively complicated, the general four-stroke gasoline engine is composed of two major mechanisms and five systems. In this issue, we will briefly introduce you to you. In the following series of lectures, we will explain in detail.

First, let’s get to know the body group. The function of the body is as an assembly base for various mechanisms of the engine and each system, and it is itself a component of the crankshaft linkage mechanism, the gas distribution mechanism, the supply system, the cooling system, and the lubrication system. The cylinder head and the inner wall of the cylinder block together form part of the combustion chamber, which is a mechanism that withstands high temperatures and high pressures. The engine block of the engine generally includes a cylinder head, a cylinder block, and an oil pan.

Everyone knows that the airway of the human body is used for inhaling and exhausting, and the engine’s valve train has similar functions. Its function is to make the combustible mixture charge into the cylinder in time and discharge the exhaust gas from the cylinder in time. The valve train mainly includes an intake valve, an exhaust valve, a tappet, a spring, a rocker arm, a camshaft, and a camshaft timing gear (driven by a crankshaft timing gear).

The crank-link mechanism is a mechanism by which the engine generates power and converts the linear reciprocating motion of the piston into a rotational motion of the crank to output power. The crank linkage mechanism includes a piston, a connecting rod, a crank, a crankshaft with a flywheel, and the like.

In order to ensure that the compressed mixture in the cylinder is ignited in time according to the specified time, for an ignition engine (such as a gasoline engine), we have to use the ignition system. The ignition system mainly includes batteries, generators, breakers, distributors, ignition coils, spark plugs, and the like.

With the ignition system, who is the fuel for the engine? This is the task that the fuel supply system has to accomplish. Its function is to send fuel into the cylinder as required, and mix with air to form a certain proportion of combustible mixture for combustion, and then exhaust the combustion generated exhaust gas to the engine. The supply system mainly includes a fuel tank, an oil pump, a fuel filter, a carburetor (not for an electric spray vehicle), an air filter, an intake pipe, an exhaust pipe, a muffler, and the like.

People feel hot and sweat when they are in the summer or when they are doing sports. If you blow the fan or turn on the air conditioner, it feels more comfortable. The engine is heated during operation and also requires cooling. The function of the cooling system is to dissipate the heat of the heated parts to the atmosphere to ensure the normal operation of the engine. The cooling system mainly includes a water pump, a radiator, a fan, a water distribution pipe, a cylinder body discharge valve, and a cavity formed in the cylinder block and the cylinder head, a water jacket, and the like.

As you may know, the function of the lubrication system is similar to the skin care products we usually use. The skin needs care and the engine needs to be maintained as well to extend the life of the engine. The function of the lubrication system is to supply the lubricating oil to the parts that move relative to each other to reduce the frictional resistance between them, to reduce the wear of the parts, and to cool the parts and clean the parts.

As for the starting system, its role is mentioned in the previous section of the basic working principle of the engine, that is, the stationary engine is started and transferred to self-operation, which includes the starter and its attachments.

https://www.xjetl.com