Only die-hard drivers know the cold knowledge of these cars.

With the rapid development of on-board automobile industry, more and more people buy cars now. Most people buy cars just for the convenience of travel, and they don't know much about cars. Cars have gradually spread to our lives, bringing us a lot of convenience and greatly improving the efficiency of travel. People can say that they have memorized the common sense of cars. As the saying goes, where there is common sense, there is cold knowledge. You drive to work day after day, but how much do you know about car cooling? If you want to know more and learn more than others, you may wish to take a look at the following unpopular knowledge of cars and ensure that only you know the next chat!

Why does the turn signal click? The turn signal is turned on and off by the flasher and relay in the circuit. The structure of relay is electromagnet and switch, which will make a clicking sound at the moment of work. When the flash relay works, the turn signal repeatedly clicks. Now many functions of the car need to be directly executed by the corresponding control unit, and the car does not need a flash relay. The sounds we hear now are basically analog. With this sound, the driver can clearly know whether the turn signal is on or not, which can improve the driving safety.

Brake is higher than throttle: the principle is simple, that is, to increase the recognition of the two. Think about how dangerous it will be if they are at the same height. It is easy for drivers to mistake the throttle for braking! Then why is the brake higher than the throttle, not the throttle higher than the brake? Because stepping on the brakes by mistake is more dangerous than stepping on the accelerator? Similarly, the brake pedal is about 20mm higher than the accelerator, which makes the owner feel a little uncomfortable and reminds them to prevent stepping on the accelerator by mistake.

Why do SUVs have rear wipers and cars don't? This is mainly related to the shape of the car. When the car is moving forward, the route of airflow is windshield-roof-rear window glass, so dust and water are not easy to accumulate on the rear window glass. The airflow route of SUV is the front windshield-roof, and dust is easily adsorbed on the rear window glass, causing visual impairment in the rear. Therefore, these hatchback models have rear wipers, such as the sedan version and the hatchback version of Angkor Sela.

Traffic lights actually appeared before the invention of cars: the first essence of driving rules according to the instructions of traffic lights, but you should know that the invention of traffic lights was 20 years earlier than the invention of cars. As we all know, cars were invented by Germans Jukal Muz and gottlieb daimler in 1886, and traffic lights began to be used as early as 1868, because in the early days,

It is best not to refuel in thunderstorm weather: because there is much thunder and lightning hits the air, a large number of charged particles will spread in the air. At this time, if the vehicle is refueled during thunder, the oil gun can easily introduce stray and scattered current into the fuel tank, and the flammable oil vapor can easily spread into the surrounding air. At gas stations, the concentration of fuel vapor is much higher than that in other places. If you continue to refuel at this time, the fuel vapor will be easily struck by lightning, and both the vehicle and the fuel tank will explode.