The original factory only has a pair of wipers, so it must be tested for a long time before it can be installed on the commercial car. As far as the car factory is concerned, the wiper is not a simple combination of a rubber scraper and an arm. They must also consider the durability of the wiper motor and the spraying area of the sprinkler. As far as wiper motors are concerned, there are unidirectional or bidirectional motors. Some advanced models will automatically change the position of the wiper when parking even if the wiper is not started. This is not that the wiper is broken, but that the engineer is worried that the wiper will be damaged by sticking to the glass for too long.
In addition, engineers have to consider that the wiper motor should not only be able to withstand high temperature and high humidity, but also ensure that it can work smoothly in the ice and snow, and at the same time, it should not make too much noise. Similarly, in addition to spraying powerfully, widely and accurately, sprinklers also need to spray quietly to satisfy their owners. At the same time, the timing of water spraying must also match the timing of wiper arm cleaning to achieve the best effect. When these two items are finished, it's the wiper's turn. The bigger the wiper, the better. Too large wiper will lead to too long wiping cycle and affect driving vision. Wipers with too small a cleaning range are also too small, which is also unqualified. At the same time, the wiper must match the curvature of the front windshield, and the aerodynamics must be considered so that the wiper arm will not be lifted by the wind speed at high speed.
As for how often to replace the wiper strip, it is best to replace the original wiper once every six months. First of all, Tinin, Belgium, produces the most wipers in the world, producing 700 models and 350,000 wipers every year. The earliest inventor of the wiper is still an unsolved case, and the three most likely people are an American woman named Mary Anderson. But the invention of the wiper was not because of the car, but because of the train.
At that time, in the wet and cold winter, drivers had to get off the car to clear the snow on the glass before the electric car started, but at this time, cold air would flood into the car, so he invented a wooden brush controlled by mechanical principle in the car. But cars were not popular then. Mary Anderson actually applied for a patent at1903165438+10, but at this time, an American named Robert Douglass also got a patent at1903 March 12. So it is still controversial who invented the wiper properly, but it must be 1903, which should be the year when the wiper was born!