What are the two major mechanisms and five systems that make up a gasoline engine? What are their fu

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

1. Cooling system: motor vehicles usually use water cooling. The water-cooled type is composed of a water pump, a radiator, a fan, a thermostat and a water jacket (in the body), etc., and its function is to use the circulation of cooling water to dissipate the heat of high-temperature parts into the atmosphere through the radiator, so as to maintain the normal working temperature of the engine electric.

2. Lubrication system: The lubrication system is composed of oil pump, filter, oil channel, oil pan, etc. Its function is to distribute the lubricating oil to the friction surface of each relatively moving part to reduce friction, slow down the wear of the parts, and clean and cool the friction surface.

3. Ignition system: The ignition system of gasoline engine is composed of power supply (battery and generator), ignition coil, distributor and spark plug, etc., and its function is to ignite the compressed combustible mixture in the gas cylinder in time according to the specified time.

4. Starting system: The starting system is composed of a starter and a starting relay, which is used to start the stationary engine and turn it into a self-running state.

5. Fuel supply system: Due to the different fuels used, it can be divided into gasoline engine fuel supply system and diesel engine fuel supply system.

6. Valve mechanism: The valve mechanism is composed of intake valves, exhaust valves, valve springs, tappets, camshafts and timing gears. Its function is to charge the fresh gas into the cylinder in time, and discharge the exhaust gas generated by combustion out of the cylinder in time.

1. Body group and composition: cylinder head, cylinder block and crankcase 2. Function: As the assembly base of various mechanisms and systems of the engine, it is the skeleton of supporting and fixing the crank connecting rod mechanism and other devices, and the relevant parts of the tractor chassis form the frame of the tractor.

2. Crank connecting rod mechanism and composition: mainly including pistons, connecting rods, crankshafts, flywheels, etc. Function: It is the engine that generates power and converts the linear reciprocating motion of the piston into the rotary motion of the crankshaft to output power.

3. Valve mechanism and intake and exhaust system Composition: mainly including intake valves, exhaust valves, tappets, push rods, rocker arms, camshafts and camshaft timing gears (driven by crankshaft timing gears) Function: make the combustible mixed gas timely charge into the cylinder and discharge the exhaust gas from the cylinder in time.

4. Supply system and governor and composition: mainly including fuel tank, sedimentation cup, diesel filter, fuel pump, fuel injection pump and governor, etc. What it does:

The clean diesel is sprayed into the combustion chamber in the form of mist at a timed, quantitative and constant pressure, and the fuel supply is automatically adjusted according to the load of the diesel engine to ensure the most economical and stable operation of the engine.

5. Starting device and composition: starting motor and its clutch mechanism, flywheel gear ring, starting switch, battery, etc. 2. Function: It is a mechanism that can smoothly detach the diesel engine from a static state to a running state and can be smoothly separated from the diesel engine as soon as it enters the running state.

6. Cooling system and composition: the cooling jacket, water pump, thermostat, fan, radiator, water temperature gauge and other functions of the cylinder block and cylinder head: dissipate the heat of the heated parts into the air, delay the decline of the strength and hardness of the parts to cause deformation and damage, maintain the appropriate matching clearance of the matching parts, avoid the deterioration of lubricating oil by high temperature, and ensure the normal operation of the diesel engine.

Lubrication system composition: mainly including oil pump, pressure limiting valve, oil filter, lubricating oil channel, etc. What it does:

The lubricating oil is supplied to the parts in relative motion to reduce the frictional resistance between them, reduce the wear of the parts, and partially cool the friction parts and clean the friction surface.

The engine is composed of two major mechanisms and five systems, the two major mechanisms are: crank connecting rod mechanism, valve mechanism (cam mechanism). Five systems: cooling system, ignition system, starting system, lubrication system, fuel supply system. Hope it helps.

There are five major systems in the car: engine, driveline, steering, braking and chassis.

The engine consists of two major mechanisms and five major systems.

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 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.

It is composed of a crank connecting rod mechanism, a gas distribution mechanism, a fuel supply system, a lubrication system, a cooling system, an ignition system and a starting system.

In addition, the crank connecting rod mechanism is the main moving part of the engine to realize the working cycle and complete the energy conversion, which is composed of the body group, the piston connecting rod group and the crankshaft flywheel group. 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.

Precautions for the use of gasoline engines.

It should be noted that the newly purchased gasoline engine should be unsealed before use: unsealing is to remove the oil from the oil seal in the cylinder. The method is to unscrew the spark plug, pull the starting wheel with a rope to force the oil in the cylinder to spray from the spark plug hole, and wipe the spark plug hole cavity and its electrode part with a clean cloth; Install the spark plug on the high-voltage line, then put the spark plug on the cylinder head and quickly turn the starting wheel by hand, the spark plug should jump the fire, and finally tighten the spark plug and install the high-voltage line.

Before starting, add the mixed oil according to the specified proportion: that is, the mixed oil prepared with No. 90 gasoline and special engine oil for two strokes. Note that within the first 50 hours of operation of the gasoline engine, the mixing ratio of gasoline to engine oil is 15 1;After 50 hours of operation of the gasoline engine, the proportion of mixed oil is 20 1 (the proportion of mixed oil of the lightly loaded gasoline engine is 25 1), and the mixed oil must be filtered through a silk strainer screen when added to the fuel tank to remove impurities in the oil.

The dirty oil at the bottom of the oil storage container cannot be used, so as not to cause wear and tear on the machine.

Crank linkage mechanism Air valve mechanism Supply system Ignition system Cooling system Lubrication system Starting system.

Which five major institutions are the main gasoline engines.

The automobile engine is the engine that provides power for the car, and it is the heart of the car, which affects the power, economy and environmental protection of the car. According to different power**, automobile engines can be divided into diesel engines, gasoline engines, electric vehicle motors, and hybrids.

Common gasoline engines and diesel engines belong to reciprocating piston internal combustion engines, which convert the chemical energy of fuel into mechanical energy of piston movement and output power to the outside world. The gasoline engine has high speed, small quality, low noise, easy starting, and low manufacturing cost; The diesel engine has a large compression ratio, high thermal efficiency, and better economic performance and emission performance than the gasoline engine.

In addition to the use of gasoline and diesel, vehicles that use other new energy sources are called new energy vehicles, including pure electric vehicles, hybrid electric vehicles, fuel cell vehicles, gas vehicles, bioethanol biodiesel vehicles, and hydrogen-powered vehicles. Most of the new energy vehicles sold in the Chinese market are hybrid vehicles, but at present, pure electric vehicles have been taken as the main direction.

The two major structures of the gasoline engine: the crank connecting rod mechanism and the valve distribution mechanism, and the five major systems: the fuel supply system, the cooling system, the lubrication system, the ignition system and the starting system

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

The gasoline engine is composed of two major mechanisms and five major systems, namely the crank connecting rod mechanism, the gas distribution mechanism, the fuel supply system, the lubrication system, the cooling system, the ignition system and the starting system.

Crank connecting rod mechanism In the power stroke, the piston bears the gas pressure in the cylinder for linear motion, through the connecting rod to convert into the rotary motion of the crankshaft, and from the crankshaft external output power. During the intake, compression and exhaust strokes, the flywheel releases energy and converts the rotational motion of the crankshaft into the linear motion of the piston.

The function of the valve mechanism is to open and close the intake and exhaust valves regularly 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 achieve air exchange.

Fuel supply system The function of the fuel supply system of 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; The function of the diesel engine fuel supply system is to supply diesel and air into the cylinder respectively, form a mixture in the combustion chamber and burn it, and finally discharge the exhaust gas after combustion.

Ignition system In a gasoline engine, the combustible 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 extends into the combustion chamber. Able to generate an electric spark between the spark plug electrodes on time.

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 the most suitable temperature state.

Lubrication System The function of the lubrication system is to deliver a certain amount of clean lubricating oil to the surface of the parts that are moving relative to each other, so as to achieve liquid friction, reduce frictional resistance, and reduce the wear of parts. and the surface of the part is cleaned and cooled.

Starting system 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 first, so that the piston reciprocates, and the combustible mixture in the cylinder burns and expands to work, and pushes the piston to move downward to rotate the crankshaft. The engine can run on its own and the duty cycle can be automatic.

This is not easy to say, generally speaking, there are cylinder heads, cylinder liners, two valves, one in, one out, as well as crankshafts, pistons, camshafts, timing chains... Oops, I can't think of anything else. But that's about it.

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.

Airframe group. The engine body group generally includes the cylinder head, cylinder block and oil pan, which are the main parts of the engine. The upper part of the cylinder block is the cylinder, and the lower part is the crankcase.

The cylinder block is the assembly base of the working mechanism and accessories of the engine, and it is also an integral part of the crank connecting rod mechanism, the valve mechanism, the lubrication system and the cooling system. The cylinder head is mounted on the upper part of the cylinder block, and the headspace of the cylinder head, cylinder and piston when they reach the top dead center constitutes the combustion chamber, in which the fuel is burned to produce heat. In the engine structure, the body is often arranged as a crank connecting rod mechanism.

The crank linkage mechanism includes pistons, connecting rods, crankshafts, flywheels, etc. The function of the crank linkage mechanism is to convert the linear reciprocating motion of the piston into the rotary motion of the crankshaft and output power. The valve train mainly includes intake valves, exhaust valves, springs, rocker arms, push rods, tappets, camshafts and camshaft timing gears (driven by crankshaft timing gears).

Its function is to infill the cylinder with the combustible mixture in time and discharge the exhaust gas out of the cylinder in time. The supply system mainly includes fuel tank, oil pump, fuel filter, carburetor (or EFI), air filter, air intake pipe, exhaust pipe, muffler, etc. Its function is to mix fuel and air to form a certain proportion of combustible mixture, and send the cylinder for combustion, and then exhaust the exhaust gas generated by combustion out of the engine.

The lubrication system is generally composed of an oil pump, a filter collector, a pressure limiting valve, an oil channel, an oil filter and an oil cooler. Its function is to supply the oil to the parts that are in relative motion, so as to reduce the friction resistance between them, reduce the wear of the parts, and at the same time play the role of cooling the parts and cleaning the parts. The cooling system mainly includes water pumps, fans, water distribution pipes, cylinder block drain valves, radiators, and cavities cast in the cylinder block and cylinder head-water jackets.

The engine needs to be cooled because it is heated during operation. The function of the cooling system is to dissipate the heat of the heated parts into the atmosphere to ensure the normal operation of the engine. The function of the starting system is to start the stationary engine and turn the person to run on its own, which includes the starter and its accessories.

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