"Oxcart Lab" invents 5 interesting knowledge about automobile coldness.

When turning on the turn signal or the danger warning flash, it will make a "click sound", which is well known and customary. But why are there no low beam lights, high beam lights and fog lights? This is mainly because the use time of turn signals or danger warning flashlights is mostly short, and there will be a "clicking sound" to prevent drivers from forgetting to turn them off. When the low beam, high beam and fog lamp are turned on, it usually takes a long time, and the sound will affect the driver. Therefore, only when the turn signal or the hazard warning flash is turned on will a "click" sound be issued.

2. Why is the brake pedal higher than the accelerator pedal?

Many novice drivers have a question, why is the brake pedal higher than the accelerator pedal? This is not an ergonomic design, is it? In many accidents, many novice drivers mistakenly use the accelerator as a brake, which has caused very serious consequences. The brake is higher than the accelerator pedal. On the one hand, a longer journey is reserved to facilitate the driver to master the braking force. On the other hand, deliberately create a foot feeling different from the throttle to prevent the driver from mistaking the throttle for braking.

3. Why is the glass water blue?

This mainly comes from the composition of glass water, mainly including alcohol, ethylene glycol, corrosion inhibitor and various surfactants. These substances are all chemicals, which are toxic to human body and can't be drunk. Blue is not the color of these materials, but the color specially added to inform users that the liquid is toxic and not drinkable.

4. Why is the spare tire ugly and small?

Many consumers think that the ugly and small non-full-size spare tire is the behavior of the manufacturer to cut corners, but as the owner, the use probability of the spare tire is not high, and the full-size spare tire is large, which will occupy more trunk space, and dragging a heavy full-size spare tire every day will undoubtedly increase fuel consumption. The non-full-size spare tire is smaller and lighter. The spare tire is only used as an emergency and will not have much impact on driving. The reason why the spare tire is ugly and small is actually to remind the owner that it is a spare tire and can only be used temporarily. If the design is the same as the normal wheel hub, there will definitely be car owners who are too lazy to replace it. On the one hand, it is unsafe, on the other hand, it will inevitably be replaced in the next emergency.

5. Why doesn't the car have a rear wiper?

The rear wiper of the hatchback is almost standard, and there is almost no rear wiper in the sedan. Why? This is mainly due to the body structure. The rear window of the hatchback and the rear of the hatchback are roughly on the same plane, which is easy to be thrown on the soil and affects the rear view. Because the trunk of the sedan is prominent, the probability of the tail window being thrown mud is much lower than that of the hatchback, so the rear wiper is not a necessity.

Some seemingly ordinary or incomprehensible designs are actually the result of repeated scrutiny by engineers. Cars are the crystallization of the wisdom of the development of human society for many years. Cars are changing all the time, quietly enriching our lives.