Engine compartment graphic illustration of automotive engine compartment interior parts (super detailed)


汽车小白难免会一脸懵逼, 估计除了发动机外其他零件就不知道了,下面我们就把汽车发动机舱内部零件图解分享给大家,希望大家对认识发动机舱零件的构造和作用有所帮助。 The engine compartment is where most of the car's main parts are. Open the hood and you will find that the engine compartment is densely lined with various auto parts. The first time you saw the car in the engine compartment, Xiao Bai would inevitably be aggressive, it is estimated that except the engine I do n’t know about other parts. Below, we will share the illustration of the internal parts of the car engine compartment. I hope everyone will be helpful in understanding the structure and function of the engine compartment parts.

Take the 4A13 engine as an example.

Air filter :

The role is to filter dust and impurities in the air and let clean air enter the engine, which is important to the life and normal operation of the engine. The dust and dirt adsorbed by the air filter will be blocked and affect the engine, so it must be replaced regularly. If you drive in a dusty place, such as a sandstorm, the air filter replacement cycle will be shortened.


Needless to say, it is the storage of electrical energy. Usually lead-acid batteries, the electrolyte is dilute sulfuric acid.

Brake fluid irrigation:

Brake oil is usually said. At present, the brakes of cars are generally hydraulic, that is, the brake fluid is used as the medium to transmit the force of the brake pedal to the brake disc.

Ignition coils:

The low voltage is transformed into a high voltage, and the spark plug discharges below it to generate an electric spark, which ignites the oil-gas mixture to combust for work.

Oil filling port:

Needless to say, this is a mineral or synthetic oil that acts as a lubricating seal. If the engine lacks oil lubrication, it will cause serious problems such as pulling cylinders and holding shoes.

Power steering oil:

At present, the steering assistance of a car is generally the traditional hydraulic assistance. Since it is hydraulic, the oil medium is needed. Of course, some cars have begun to use electric power, which is also the future development trend.

Antifreeze irrigation:

内的通道循环,用于冷却发动机的液体介质,主要是水和添加剂,因为有防冻的功能,就叫防冻液了。 The circulation in the channel of the radiator and the engine cylinder. The liquid medium used to cool the engine, mainly water and additives, is called antifreeze because of its antifreeze function.

Glass kettle:

Everyone on the earth knows that it is used to clean glass. Where should you guide now?


Ruler for detecting the amount of engine oil. When using the engine, first turn off the engine, pull out the oil dipstick, wipe the oil on it with a clean paper towel, and then insert and pull out again. The oil level of the oil must be between the two upper and lower limits on the ruler. Can't be less.

Insurance box:

There are many fuses for electrical equipment and relays. There are two safety boxes in the small F, and the other one is on the lower left of the cab driver. See the accompanying manual for details.

Air inlet:

The intake of the engine air intake is optimized, and its position has been improved a lot. The air intake of the old car is relatively low, and the engine is prone to water when wading. The position of the air intake is the limit of the wading depth of the car, and it must not be exceeded. Once the engine enters the water, the consequences are very serious ~!

Electronic throttle (throttle):

It is said that the throttle is actually not related to the oil. It is connected to the intake manifold and the intake manifold and controls the engine air intake, so it should be an electronic throttle. The engine control module calculates the fuel injection amount based on the intake air volume, so that the engine speed and output power can be controlled.

Intake manifold:

The branch from the intake manifold to the individual cylinders. Although it is a tube, it is technologically advanced, such as a variable intake manifold.

Carbon canister valve:

The carbon canister absorbs the gasoline vapor in the fuel tank. After the carbon canister valve is opened, the engine will suck the gasoline vapor adsorbed by the activated carbon in the carbon canister into the intake pipe, and finally participate in the combustion. This is good for environmental protection and saves a little oil.

Gasoline distributor:

Distribute gasoline to each fuel injector, and the fuel injector is connected underneath, which is blocked and invisible.

Crankcase ventilation pipe:

。 The right is the intake pipe and the left is the exhaust pipe, which is used to ventilate the crankcase .


The gasoline pumped by the gasoline pump is sprayed in an atomized form. The hole of the fuel injection nozzle is very small, so that the gasoline can be atomized better, but it is also easy to be blocked, so the fuel injection nozzle should be cleaned regularly.

Vacuum booster:

Using the force generated by the difference between the vacuum negative pressure of the engine intake pipe and the pressure of the atmospheric pressure to assist the brakes can reduce the "labor intensity" of the driver.

Brake master cylinder:

The brake fluid pressure is generated and transmitted to each brake cylinder via the brake hose.

Clutch master cylinder:

When the clutch pedal is depressed, the clutch master cylinder connected to the pedal will act, generating hydraulic pressure, which will be transmitted to the clutch pump along the pipeline, and finally converted into a mechanical force release clutch. The clutch system of the small F is hydraulic and shares a hydraulic fluid with the brake system, so a tube is connected to the brake fluid tank.

ABS pump:

A very important safety device ~! ABS means automatic anti-lock braking system. When the brake is applied, the ABS system will automatically apply a few dozens of points per second to each wheel according to the speed and braking strength to prevent tire Locking and slipping, the body lost control. And it can provide steering ability to avoid obstacles when braking.

Power steering pump:

Provides hydraulic power for steering assistance. Recently, some owners in the jars reported that the abnormal noise of the belt was the displacement of the booster pump bracket, which caused the pulleys of the booster pump and other pulleys not to be on the same plane. When the belt was running, the pulleys and the pulleys abnormally rubbed, causing noise.

Air-conditioning compressor:

Compress the vaporized refrigerant into a liquid state and pump it into the evaporator to produce the coolness we need ~!

Exhaust manifold:

The exhaust gas generated by each cylinder of the engine is discharged into the exhaust manifold through the exhaust manifold, and then discharged into the atmosphere through the three-way catalyst and muffler. Because the exhaust gas of the engine is very hot, a protective shell is added here to play the role of heat insulation. Seeing that hand-shaped logo is not there, there is also an X, which means don't touch it, it will burn you ~!

Oxygen Sensor:

The oxygen content in the exhaust gas is detected, and the signal is transmitted to the engine control module, which is used to control the fuel injection amount so that the fuel can be fully burned and the emissions are reduced. If there is a problem with the oxygen sensor, the engine is said to be unstable at idle and fuel consumption will increase dramatically.

Clutch pump:

的,由离合器总泵产生液压力,沿离合器油管传递到离合器泵中产生机械力,推动右侧的分离杆,分断离合器。 The clutch of the small F is hydraulically driven . The clutch master cylinder generates hydraulic pressure, which is transmitted along the clutch oil pipe to the clutch pump to generate mechanical force. The right side release lever is pushed to disconnect the clutch. The hydraulic zip cable is much easier to use.

Selector shift cable:

One end of the cable is connected to the gear lever in the cab, and the other end is connected to the gear selection and shifting mechanism. The cable has a great effect on the feeling of shifting. If you have difficulty in gear shifting, it may be a problem with the cable ~!


进入工作状态。 In fact, it is a small electric motor. When the key switch is turned to the starting position, the starter rotates, and at the same time, the engine is rotated to assist the engine to start working. If it is difficult to start a fire when starting the car, the duration of the fire cannot be too long, a few seconds at a time. It has been unsuccessful for a few times in a row. You should screw the key back, wait a few minutes, and allow the starter to cool down, then power it on again. This prevents the starter from burning out.

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Car Questions and Answers 11-24

1. Before cleaning the engine compartment, please make sure that the vehicle has been turned off for more than three hours, otherwise there is a danger of burns. It is not recommended that everyone flush the cabin directly with running water, first blow the cabin clean with a high-pressure air gun ...

条评论 1 comment

  • Visitors

    Reply to guest comment on [2019-12-17 09:09:31]

    Thank you, very helpful for apprentices

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