Ask the automotive experts, ask the automotive experts

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<> "These basic knowledge of automobiles can be half an automotive expert."

Knowing these basic knowledge of automobiles, you can become half an automotive expert! If no one praises you, come to me.

Now our living conditions have been much better, so many people will buy a car of their own at this time, and they will drive on the road after buying another car, so they may encounter all kinds of small problems when driving on the road, and there are some small problems of cars that we can solve by ourselves, but many people don't understand much, and now I bring you an article that tells you the basic knowledge of these cars. If you know the basics of cars, you can become half an automotive expert, and if no one praises you, come to me.

What is the relationship between the number of cylinders in an engine and the engine speed? Generally speaking, the more cylinders under the same cylinder diameter, the larger the displacement, the higher the power, the more cylinders under the same displacement, the smaller the cylinder diameter, the corresponding increase in speed, so the greater the power. So what kind of effect does the length of the wheelbase have on which aspect of the car?

In fact, you should know that the wheelbase refers to the distance between the front axle and the rear axle, which will affect the handling of our driving, the minimum steering radius, the body stiffness, the indoor space chassis passing capacity and so on. If you want to cut off the power supply, why do you want to cut off the negative electrode? In other words, if the negative electrode of the battery is disconnected and then operated, even if the tool touches the live wire, it will not cause a short circuit.

What are active and passive safety systems? Active safety is to basically play an accident prevention device before there is an accident, and the passive safety system is to protect the people in the vehicle after an accident, such as airbags. So how should the battery factory maintain it to make its life longer?

In fact, many of them are maintenance-free now, and at the same time pay more attention to them, these problems can be, the first problem is not to travel too short, the second is not to overdischarge, even after turning off the engine, do not stop in the car for a long time to use electricity, the third is to stop for a long time, and be sure to charge it regularly.

Why don't you use coolant instead of water for tank water? Because relatively speaking, coolant has the functions of anti-rust and high boiling point compared to water, and there are places where the water quality is poor, such as the water cooling system will produce a lot of scale, which will affect the refrigeration effect. Is it more expensive in summer than in winter?

In fact, there is no reason for this, because the normal engine operating temperature is maintained at 80 105 degrees, whether it is summer or winter, for technology, its operating temperature does not change much, so the consumption of engine oil is about the same.

Automotive experts are not alone!! What do you want to ask?

Generally, the value reflected by the pointer of the automobile fuel gauge is realized by the power feedback of the fuel tank float, which can only be used as a reference and cannot accurately reflect the amount of fuel.

The principle of the fuel tank float is to measure the level of oil in the oil tank, drive the float to move up and down, the float is connected with a connecting rod and a sliding resistance, the level of the oil level makes the position of the sliding resistance also change, and the resistance value of this change is reflected on the instrument, and we can see the level of the oil value.

Since the trolley fuel tank is not a regular shape, so the resistance position is not the distance and the resistance value corresponding, here to remind is that the fuel gauge of each grid of the fuel volume is not the same, do not believe you try, if the first grid you can run 100 kilometers, the second may be 130 kilometers.

What you said is a whole bar of oil missing, you also have to take into account the state of the car, the amount of hot car oil and the amount of cold car oil have changed, because there is a gasoline pump in the fuel tank, the car will run after starting, and the car will bump when driving, which will cause changes in the liquid level in the fuel tank, and these change values are the changes you see.

Knowing this truth, let's not stick to looking at how many kilometers each one can run, you just remember to estimate how much fuel is left through the meter, and compare the distance you have to fill up the fuel several times to run to the last grid, if the difference is not big, there is no problem.

I changed the float of the car, because I filled up a tank of fuel and the pointer was still half a bar, so the float was the problem.

The oil level sensor does not measure accurately.

If it is a fast driving time, the distance between the right side of the general driving and the pedestrian should be kept more than 1m, in order to prevent pedestrians from abnormal behavior in your collision, according to my experience the left side is easy to see, at this time it is the left side of the safety situation, keep to the left side of the road, drive a small car this is not obvious, you observe the bus, you will find that the driver is too narrow place, overtaking is as far as possible on the left side, sometimes the left side is more than 20 cm, the right side of more than 1m of space.

If you are driving slowly, such as starting at a red light in the city, or when passing a zebra crossing, drive cautiously, slowly, as long as pedestrians notice you, there will be no problem, pedestrians know better than you whether they need to be able to hang on to him, and then drive slowly more, you will know the distance on the right, but in any case, you should be slower in crowds, especially when you are wearing headphones in front of you, or children.

Just get a driver's license, drive carefully, explain that your safety is very strong, teach you a way, ask your lover or friend to stand in the position you are worried about, you pay attention to the observation in the car, you can first find a reference in the car to compare, remember, the heart has the bottom.

The normal situation is to see people before rubbing.