Engine composition? What is the composition of the engine?

The automobile engine is composed of five major systems and two major mechanisms, the two major mechanisms are the crank connecting rod mechanism and the valve mechanism. The five major systems are the fuel supply system, the cooling system, the lubrication system, the ignition system, and the starting system. The engine is not one, the engine has valve chamber covers, cylinder heads, cylinder blocks, oil pans from top to bottom, and gaskets between these parts.

Inside the engine there are connecting rods, pistons, crankshafts, valves, camshafts, balance shafts, etc. The engine is known as the heart of the car, and the engine is responsible for powering the car. In the car, there is another very important component, and that is the gearbox.

The gearbox plays the role of variable speed and torque, the gearbox belongs to the transmission system, the gearbox can transmit the power generated by the automobile engine to the wheels, and the power output of the gearbox after changing the speed and torque can meet the needs of the car in various working conditions. There are many types of automobile engine cylinders, such as in-line cylinders, V-cylinders, W-cylinders, horizontally opposed cylinders, etc. Most common family cars are equipped with in-line four-cylinder engines, some high-performance cars are equipped with V-cylinder engines, and some brands use horizontally opposed cylinder engines.

1. Crank connecting rod mechanism: connecting rod, crankshaft, bearing, flywheel, piston, piston ring, piston pin, crankshaft oil seal; 2. Air distribution mechanism: cylinder head, valve chamber cover, camshaft, valve, intake manifold, exhaust manifold, air filter, muffler, three-way catalysis, supercharger, intercooler, etc.; 3. Cooling system:

It is generally composed of a water tank, a water pump, a radiator, a fan, a thermostat, a water temperature meter and a water discharge switch; (The automobile engine adopts two cooling methods, namely air cooling and water cooling, and the engine in the mainstream market of China's automobile is mostly water-cooled.) 4. Lubrication system: The engine lubrication system is composed of oil pump, filter, oil filter, oil channel, pressure limiting valve, oil gauge, pressure sensing plug and oil dipstick, etc.; 5. Fuel system:

The fuel system of gasoline engine is composed of gasoline tank, gasoline gauge, gasoline pipe, gasoline filter, gasoline pump, carburetor, air filter, intake and exhaust manifold, etc.; 6. Starting system: starter, ignition switch, battery; 7. Ignition system: spark plugs, high-voltage wires, high-voltage coils, distributors.

The five major engine systems include: fuel supply system, starting system, cooling system, lubrication system, and ignition system.

In general, the current engine consists of two major mechanisms and five major systems.

1. Crank connecting rod mechanism.

The crank linkage mechanism is the main moving part of the engine to realize the working cycle and complete the energy conversion. It is composed of a body group, a piston connecting rod group and a crankshaft flywheel group, etc.

Second, the gas distribution mechanism.

The function of the valve mechanism is to open and close the intake and exhaust valves at regular intervals according to the working sequence and working process of the engine, so that the combustible mixture or air enters the cylinder, and the exhaust gas is discharged from the cylinder to realize the ventilation process. The opening and closing of the intake and exhaust valves are controlled by the camshaft. Camshafts are driven by a crankshaft through toothed belts or gears or chains.

The intake, exhaust valves and camshafts, as well as a number of other parts, work together to form the valve train.

3. Fuel supply system.

The function of the fuel supply system of the gasoline engine is to prepare a certain amount and concentration of mixed gas according to the requirements of the engine, supply it to the cylinder, and discharge the exhaust gas after combustion from the cylinder to the atmosphere;

Fourth, lubrication system.

The function of the lubrication system is to deliver a certain amount of clean lubricating oil to the surface of the parts in relative motion to achieve liquid friction, reduce frictional resistance, and reduce the wear of parts. and the surface of the part is cleaned and cooled. The lubrication system usually consists of a lubricating oil channel, an oil pump, an oil filter, and some valves.

5. Cooling system.

The function of the cooling system is to dissipate part of the heat absorbed by the heated parts in time to ensure that the engine works at a suitable temperature. The cooling system of a water-cooled engine usually consists of a cooling jacket, a water pump, a fan, a water tank, a thermostat, etc.

6. Ignition system.

In a gasoline engine, the flammable mixture in the cylinder is ignited by an electric spark, for which a spark plug is installed on the cylinder head of the gasoline engine, and the head of the spark plug protrudes into the combustion chamber. All equipment that can generate electric sparks between the spark plug electrodes on time is called an ignition system, which usually consists of a battery, a generator, a distributor, an ignition coil and a spark plug.

The spark plug has a central electrode and a side electrode, and the two electrodes are insulated from each other. When the DC voltage is added between the two electrodes of the spark plug and the voltage rises to a certain value, the gap between the two electrodes of the spark plug will be broken down to produce an electric spark, and the minimum voltage required to produce an electric spark between the two electrodes of the spark plug is called the breakdown voltage; All devices that can generate an electric spark between the two electrodes of the spark plug are called engine ignition systems.

7. Starting system.

It is not difficult to understand this, in order to make the engine transition from a stationary state to a working state, it is necessary to rotate the crankshaft of the engine with external force, so that the piston can reciprocate, and the combustible mixture in the cylinder burns and expands to work, and pushes the piston to move downward to rotate the crankshaft, so that the engine can run on its own and the working cycle can be carried out automatically. Therefore, the whole process from the crankshaft starting to rotate under the action of external force to the engine starting to idle automatically is called the starting of the engine. The device required to complete the starting process is called the starting system of the engine.

Two major mechanisms and five systems, crankshaft connecting rod mechanism, valve mechanism, five major systems, lubrication system, cooling system, starting system, cooling system, ignition system, fuel supply system.

These include 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).

An engine is a machine that can convert other forms of energy into mechanical energy, such as 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".

The engine consists of the following 7 parts:

1. Crank connecting rod mechanism: connecting rod, crankshaft, bearing, flywheel, piston, piston ring, piston pin, crankshaft oil seal;

2. Air distribution mechanism: cylinder head, valve chamber cover, camshaft, valve, intake manifold, exhaust manifold, air filter, muffler, three-way catalysis, supercharger, intercooler, etc.;

3. Cooling system: generally composed of water tank, water pump, radiator, fan, thermostat, water temperature gauge and water discharge switch; (The automobile engine adopts two cooling methods, namely air cooling and water cooling, and the engine in the mainstream market of China's automobile is mostly water-cooled.) ）

4. Lubrication system: The engine lubrication system is composed of oil pump, filter, oil filter, oil channel, pressure limiting valve, oil gauge, pressure sensing plug and oil dipstick, etc.;

5. Fuel system: The fuel system of gasoline engine is composed of gasoline tank, gasoline gauge, gasoline pipe, gasoline filter, gasoline pump, carburetor, air filter, intake and exhaust manifold, etc.;

6. Starting system: starter, ignition switch, battery;

7. Ignition system: spark plugs, high-voltage wires, high-voltage coils, distributors.

The engine is usually composed of a crank connecting rod mechanism, a valve mechanism, a fuel supply system, a lubrication system, a cooling system and a starting system.

1. Crank connecting rod mechanism.

The crank connecting rod mechanism is the main motion mechanism of the engine to realize energy conversion and complete the working cycle, which is composed of cylinder block, cylinder head, piston, connecting rod, crankshaft and flywheel and other parts.

2. The function of the valve mechanism is to realize the ventilation process of the engine, according to the working cycle of the engine, open and close the intake and exhaust valves regularly, so that the combustible mixture enters the cylinder, and the exhaust gas is discharged from the cylinder. The valve train usually consists of a valve train, a valve train train and a valve actuator.

3. Fuel supply system.

The function of the fuel supply system of the gasoline engine is to prepare a certain concentration and quantity of fresh combustible mixture and send it to the cylinder according to the requirements of the engine. The function of the diesel engine fuel supply system is to supply diesel and air into the cylinder respectively in a certain proportion, form a mixture in the combustion chamber and burn it, so that the engine can work continuously.

4. The function of the lubrication system is to supply a certain amount of clean lubricating oil to the friction surface of the engine moving parts.

It is mainly composed of oil pump, oil filter, pressure limiting valve and other parts.

5. Cooling systemThe function of the cooling system is to absorb and dissipate the excess heat of the heated parts of the engine to ensure that the engine works at the most suitable temperature state. It is mainly composed of water pumps, cooling jackets, radiators, fans, thermostats and other parts.

6. Ignition systemThe function of the ignition system is to generate electric sparks and ignite the combustible mixture in the gas cylinder at the specified time. It is mainly composed of ignition coils, distributors, batteries, generators and spark plugs.

7. The function of the starting system is to start the engine. The crankshaft starts to turn under the action of external force, and the process by which the engine starts to run on its own is called the starting of the engine. The starting system is mainly composed of the starter and its accessories.

The gasoline engine is composed of the above two major institutions and five major systems. The diesel engine is composed of the above two major mechanisms and four major systems, and the diesel engine is compression-ignited, so there is no ignition system.

The engine consists of the following 7 parts:

1. Crank connecting rod mechanism: connecting rod, crankshaft, bearing, flywheel, piston, piston ring, piston pin, crankshaft oil seal;

2. Valve valve structure: cylinder head, valve chamber cover, camshaft, valve, intake manifold senzhao, exhaust manifold, air filter, muffler, three-way catalysis, supercharger, intercooler, etc.;

3. Cooling system: generally composed of water tank, water pump, radiator, fan, temperature coder, water temperature gauge and water discharge switch; (The automobile engine adopts two cooling methods, namely air cooling and water cooling, and the engine in the mainstream market of China's automobile is mostly water-cooled.) ）

4. Lubrication system: The engine lubrication system is composed of oil pump, filter, oil filter, oil channel, pressure limiting valve, oil gauge, pressure sensing plug and oil dipstick, etc.;

5. Fuel system: The fuel system of gasoline engine is composed of gasoline tank, gasoline gauge, gasoline pipe, gasoline filter, gasoline pump, carburetor, air filter, intake and exhaust manifold, etc.;

6. Starting system: starter, ignition switch, battery;

7. Ignition system: spark plugs, high-voltage wires, high-voltage coils, distributors.

The engine is composed of a body group, a crank connecting rod mechanism, a valve mechanism, a supply system, an ignition system, a cooling system, a lubrication system and a starting system.

1) Body group.

The body group consists of a cylinder head, a body and an oil pan. Its function is to serve as the assembly base of various mechanisms and systems of the engine, and many parts of itself are components of the crank connecting rod mechanism, the valve mechanism, the supply system, the cooling system and the lubrication system. The cylinder head and the inner wall of the cylinder block together form the combustion chamber.

2) Crank linkage mechanism.

The crank linkage mechanism includes a piston, a connecting rod, a crankshaft with a flywheel, and more. It is a mechanism that turns the linear reciprocating motion of the piston into the rotary motion of the crankshaft and outputs power.

3) Gas distribution mechanism.

The valve train includes intake valves, exhaust valves, rocker arms, valve clearance adjusters, camshafts, and camshaft timing pulleys. Its function is to make the combustible mixture be charged into the cylinder in time and the exhaust gas is discharged from the cylinder in time.

4) Supply system.

The supply system includes gasoline pumps, gasoline filters, mixture forming devices, air filters, intake pipes, exhaust pipes, exhaust mufflers, etc. Its function is to mix gasoline and air into a combustible mixture** cylinder of suitable composition for combustion, and exhaust the exhaust gases generated by combustion out of the engine.

5) Cooling system.

The cooling system mainly includes water pumps, radiators, fans, water distribution pipes, and cavities in the cylinder block and cylinder head - water jackets. Its function is to dissipate the heat of the heated parts into the atmosphere to ensure the normal operation of the engine.

6) Lubrication system.

The lubrication system includes an oil pump, an oil collector, a pressure limiting valve, a lubricating oil channel, an oil filter, etc., and its function is to supply the lubricating oil to the parts that move relative to each other to reduce the frictional resistance between them, reduce the wear of the parts, and partially cool the parts and clean the friction surface.

7) Ignition system.

The ignition system includes batteries, generators, distributors, ignition coils and spark plugs. Its function is to ensure that the compressed combustible mixture in the cylinder is ignited in time according to the specified time.

8) Start-up system.

The starter system includes the starter and its appendages to start a stationary engine and turn it into self-running. Hope!!!