现代汽车使用的车轮,主要有三种型式:压制钢盘式车轮、钢丝辐条式车轮和轻合金铸造车轮(见图1)。由于后两种车轮的生产成本较高,现代轿车普遍采用钢制盘式车轮。这种车轮轻便坚固、刚度适中,经得起意外损伤,而且易于大量生产,价格也较便宜。过去为了使空气流通,帮助冷却制动器,轮盘上要钻许多通风孔,但轮盘一 There are three main types of wheels used by Hyundai: pressed steel disc wheels, wire spoke wheels, and light alloy cast wheels (see Figure 1). Due to the high cost of production of the latter two wheels, steel disc wheels are commonly used in modern cars. The wheels are light-weight, moderate-stiffness, withstand accidental damage and are easy to mass-produce at cheaper prices. In the past, in order to circulate air to help cool the brakes, a number of vents had to be drilled on the wheel,