There is a small hole in the mouth of the fuel tank of the car, what is it used for?

Exhaust drainage and even oil drainage, before refueling, the fuel tank is filled with air, exhaust, otherwise the fuel tank is not good to add dissatisfaction, when washing the car to drain or discharge accidentally overflowing gasoline, in addition to the temperature change when the volume and pressure will also change, need to communicate with the atmosphere, this hole can also play a role in balancing the pressure inside and outside the fuel tank, please pay attention to: Rongji igniter.

In order to prevent the fuel in the tank from spilling due to oscillation, the escape of oil vapor and the ingress of external dust, the fuel tank should be capped and sealed. However, when the fuel level is reduced due to consumption, a certain vacuum will be formed in the fuel tank, so that the oil pump will lose its oil absorption capacity; In addition, when the temperature is very high, the fuel evaporates, and the oil vapor will cause excessive pressure in the tank. In both cases, it is required that the pressure difference between the inside and outside of the tank can be automatically communicated with the atmosphere.

For this purpose, there are air vents on the fuel tank cover to balance the air pressure inside and outside the fuel tank.

During use, ensure that the vent hole on the fuel tank cap is unblocked. If the vent is blocked or the fuel tank mouth is pierced with plastic sheeting when the fuel tank cap is lost, the inside of the fuel tank will form negative pressure due to the drop of fuel level when the engine is working, resulting in unstable engine operation, power drop, automatic shutdown and difficult to start in the hot engine state.

Therefore, in the process of daily maintenance of diesel generator sets, we should take the initiative to pay attention to the condition of the pores and pay more attention to whether the pores are blocked to ensure the combustion efficiency of the diesel generator set.

Nowadays, with the rapid development of economic development, more and more people have their own cars, and many people have mastered a lot of automotive professional knowledge in order to maintain their own cars, but most people have mastered all about oil tanks, modules, and car engines.

It is very likely that very few people know about the basic know-how, and there is also a lot of information reflected in the fuel tank of the car. For example, it's not too late to understand the three key pieces of information that we are going to summarize below.

The first is tire pressure.

Value, which records the standard value of the tire pressure that should be applied to the vehicle under different loads. Although this point is overlooked by many people, it is a major point, because in general, the car moves forward with the help of four tires, and at ultra-high speeds, combined with the net weight of the car itself, the tires will cause significant sliding friction with the road surface at the beginning.

In addition to the net weight of people, as well as a variety of loads, the friction between the car tires and the road surface will be higher, in this case, if the tire pressure value is too low, the tire will be flattened, which may cause hunger into a fried tire, and it will also be more fuel consumption. And if the tire pressure value is too high, it is also very likely that the tire will burst, which is very dangerous.

The second is the car fuel labeling. The gasoline that must be added to each car has a compatible model specification, if the driver accidentally forgets it, you can try to look at the fuel tank, because it is generally written on the fuel tank that you need to use cooking oil.

The model specifications, for the car, too high-end and too low-end specifications are not very good, because if the use of car gasoline is higher than the compatible type, it will be very expensive assets, naturally rich casual. If you use less than compatible car gasoline, it may damage the engine of the closed car, which you must be aware of.

The third is the drain hole. Special attention refers to this point is not what the text indicates, but is really a small round hole, its function is to avoid too much leakage and harm to the internal structure of the car, drivers must always observe whether the hole is blocked, otherwise if too much water infiltrates into the internal structure of the car fuel tank, then it is not good, once you find that there is often oil leakage outside, you can also see if the drainage hole is blocked.

This small port functions as a side-by-side check valve. For example, when you refuel, the head of the gun will hold it up and transport, and if it is not refueled, it will be tightly closed, such as when the vehicle is shaking and unbalanced, to prevent gasoline from leaking out of it. Sneak in.

The small hole under the fuel tank cap is generally an oil drain hole. If the water flows to the outside of the oil answer or stupid box cover, the water will flow to the **! It is used for ventilation, and the fuel tank cap must be ventilated, otherwise the oil will not flow or flow very slowly.

This small hole is mainly used for exhaust and is also to prevent expansion when the weather is too hot.

This is the drainage hole Chai Chang. The purpose is to drain the rainwater that flows to the fuel tank cap when it rains and when washing the car, so that there is rainwater in the part and prevents the water from soaking into the tank.

Nowadays, with the rapid development of the economy, more and more people have their own cars, many people in order to maintain their cars, but also know a lot of car knowledge, but presumably most people know about the fuel tank, engine, engine, etc. For example, the three key pieces of information we are going to take stock of below are not too late to know.

The first is the tire pressure value, which records the tire pressure value that the car should use under different loads. Although this point is ignored by many people, it is a more important point, because generally speaking, the car relies on four tires to move forward, under the high-speed movement, plus the weight of the vehicle itself, the tire will have strong friction with the ground at the beginning, plus the weight of the person, as well as various loads, the friction between the tire and the ground will be greater, in this case, if the tire pressure value is too low, it will be flattened, which may cause a puncture, and it will also consume more fuel. And if the tire pressure value is too high, it is also very dangerous.

The second is the car fuel labeling. Every car needs to add gasoline, there is a suitable model, if the owner accidentally forgets, you can try to look at the fuel tank cover, because generally on the fuel tank cover will be written on the model of the required oil, for the car, too high-end and too low-end models are not too good, because if the gasoline used is higher than the suitable type, it will be a waste of money, of course, the tyrant is arbitrary. If you use less gasoline than the compatible type, it may damage the engine, so you must be aware of this.

The third is the drain hole. It is worth noting that this point is not any text indication, but a real small hole, its role is to prevent excessive water seepage and affect the interior of the car, the owner must always observe whether the hole is blocked, otherwise if too much water seeps into the inside of the car fuel tank, it is not good, if you find that there is often oil leakage outside, you can also see if the drainage hole is blocked.

There will be a small hole in the fuel tank of all cars, this small hole is very useful, before we have not refueled the fuel tank, the fuel tank will be filled with air, and this small hole is for exhaust, if you accidentally block this small hole on the fuel tank, then you are basically not satisfied when refueling, or if the oil is not drained properly when washing the car, in addition, the volume and pressure will also change when the temperature changes, and the atmosphere needs to be communicated. This hole can also play a role in equalizing the pressure inside and outside the tank.

This small hole is for exhaust use, and if you accidentally plug this small hole in the fuel tank, then you will basically not be able to refill when refueling. This hole can also play a role in equalizing the pressure inside and outside the tank.

The car fuel tank exhaust hole is on the fuel tank cap. There are two valves on the car fuel tank, one is the air valve and the other is the steam valve.

1. The exhaust hole of the automobile fuel tank is on the fuel tank cover.

2. There are two valves on the car fuel tank, one is the air valve, the other is the steam valve, when the oil pump sucks oil, the pressure inside the fuel tank will be reduced, when the pressure is lower than 98kpa, the air valve will open to deliver air to the fuel tank. Because gasoline is volatile, when part of the gasoline in the tank is vaporized, the pressure in the tank will rise, and when it reaches 120kPa, the steam valve will open. Gasoline vapor is discharged, but not directly into the atmosphere, but through the activated carbon tank to the intake manifold and finally through the exhaust pipe.

The fuel container on the car is a special container for storing hydraulic oil or hydraulic fluid in the hydraulic system. The fuel tank can be divided into two types: open fuel tank and closed fuel tank. The fuel tank must have a large enough volume, and the suction pipe and return pipe should be inserted below the minimum liquid level to prevent bubbles from being generated by air suction and oil return splashing; The distance between the suction pipe and the return pipe should be as far away as possible, and a partition should be set between them.

Hello, that little hole is vented.

Hello, exhaust holes, gasoline vapor cycle.

Summary. Hello, I am your car master exclusive mechanic at your service. Here's a great day. The Year of the Tiger is auspicious. We promise to be attentive, careful and attentive to solve your car troubles. Provide you with fault solutions and repair methods for your car.

Hello, friend, if you say that there is gasoline at the mouth of the fuel tank of your car, this does not rule out that the fuel cap of your mailbox is not well sealed, which causes this gasoline vapor to come out and form this problem. In this case, you have to replace this gasoline cap first, replace the gasoline smell, and you have this problem friend.

What's going on with the gas tank mouth of the car.

Hello, this question can give you a perfect reply, wait for me to sort out the information, I'm typing, 2-3 minutes, don't finish.

Hello, I am your car master exclusive mechanic at your service. Here's a great day. The Year of the Tiger is auspicious.

We promise to be attentive, careful and attentive to solve your car troubles. Provide fault solutions and repair methods for your car early. Hello, friend, if you say that there is a shortage of gasoline at the mouth of the car fuel tank, this does not rule out that the fuel cap of your mailbox is not well sealed, which leads to the formation of this problem in the gasoline vapor.

In this case, you have to replace this gasoline cap first, replace the gasoline smell, and you Lu Yuzhou this problem friend.