Why is there no wiper on the rear windshield of the car?

If you want to add a wiper, you must add a rocker mechanism, and then you need to open an opening in the tailgate of the car to accommodate the wiper mechanism. If the opening is not opened, it is necessary to increase the gap between the tailgate and the rear windshield, which will lead to poor sealing. To be fair, on a sunny day, if it rains, the trunk will become a pond.

Nowadays, cars are streamlined to minimize wind resistance. The air in the car is a little disordered. When the vehicle is running, the front of the vehicle will push the airflow away, and the diverted airflow will return along the body. When driving at high speed, unfilled space will form a vacuum zone at the rear of the car. Moreover, the C-pillar of the car is soft, the air can continue to fall, and the vacuum area will basically appear at the height of the trunk. The tail of SUV and MPV is relatively straight, so the air begins to disperse after passing through the tail column, and the vacuum area is higher, even covering the rear window glass.

Before19th century, it was always troublesome to drive without wipers in rainy days. In order to cope with the embarrassment of driving the windshield in rainy days, someone painted the glass with a mixture of onions and carrots. However, this method is troublesome, smelly, ineffective and rejected by people. Thus, in the era without wipers, people groped their way forward in the rain and snow, and traffic accidents occurred frequently. Until 1902, Mary Anderson, a rich young lady in Alabama, invented the first real wiper.

At the same time, the Irish inventor Henry James Applejohn also invented a wiper device that can clean the windshield up and down, and applied for a patent in Britain. Since then, many inventors have applied for patents for their own wiper devices. About 19 10, a woman named Charlotte Bridgeford invented the electric wiper and announced that the wiper entered the stage of technical exploration.

In order to ensure good eyesight, wipers usually need to be replaced once every six months to one year, but there are also some high-quality brands that can be used for a longer time, such as the boneless series of Bosch Belgian wiper factory and the boneless series of Japanese factory. When maintaining the automobile wiper, you can pull the wiper up and touch the cleaned wiper rubber plate with your fingers to check whether it is damaged and how elastic the wiper rubber plate is. If the wiper blade is aged, hardened and cracked, it needs to be replaced in time. The better the quality of the wiper, the longer the service time.