人人爽人人干,男女污视频在线观看,黑帮老大和我的365日2,久久亚洲成人av,亚洲日本一区二区三区,99er6免费热在线观看精品,亚洲一区免费看,91麻豆产精品久久久久久夏晴子

Disc brake History

 

Early experiments

Development of disc brakes began in England in the 1890s.

The first caliper-type automobile disc brake was patented by Frederick William Lanchester in his Birmingham factory in 1902 and used successfully on Lanchester cars. However, the limited choice of metals in this period meant that he had to use copper as the braking medium acting on the disc. The poor state of the roads at this time, no more than dusty, rough tracks, meant the copper wore quickly making the system impractical.

The American Crosley Hot Shot is often given credit for the first production disc brakes. For six months in 1950, Crosley built a car with these brakes, then returned to drum brakes. Lack of sufficient research caused reliability problems, such as sticking and corrosion, especially in regions using salt on winter roads. Drum brake conversions for Hot Shots were quite popular. The Crosley disc was a Goodyear development, a caliper type with ventilated disc, originally designed for aircraft applications.

Chrysler developed a unique braking system, offered from 1949 to 1953. Instead of the disc with caliper squeezing on it, this system used twin expanding discs that rubbed against the inner surface of a cast-iron brake drum, which doubled as the brake housing. The discs spread apart to create friction against the inner drum surface through the action of standard wheel cylinders. Because of the expense, the brakes were only standard on the Chrysler Crown and the Town and Country Newport in 1950. They were optional, however, on other Chryslers, priced around $400, at a time when an entire Crosley Hot Shot retailed for $935. This four-wheel disc brake system was built by Auto Specialties Manufacturing Company (Ausco) of St. Joseph, Michigan, under patents of inventor H.L. Lambert, and was first tested on a 1939 Plymouth. Chrysler discs were "self energizing," in that some of the braking energy itself contributed to the braking effort. This was accomplished by small balls set into oval holes leading to the brake surface.When the disc made initial contact with the friction surface, the balls would be forced up the holes forcing the discs further apart and augmenting the braking energy. This made for lighter braking pressure than with calipers, avoided brake fade, promoted cooler running, and provided one-third more friction surface than standard Chrysler twelve-inch drums. Today's owners consider the Ausco-Lambert very reliable and powerful, but admit its grabbiness and sensitivity.

Racing breakthrough

Reliable caliper-type disc brakes first appeared in 1953 on the Jaguar C-Type racing car. These brakes helped the company to win the 1953 24 Hours of Le Mans,developed in the UK by Dunlop. That same year, the aluminum bodied Austin-Healey 100S, of which 50 were made, was the first car sold to the public to have disc brakes, fitted to all 4 wheels.

Mass production

The first mass production use of the modern disc brake was in 1955, on the Citroën DS, which featured caliper-type front disc brakes among its many innovations. These discs were mounted inboard near the transmission, and were powered by the vehicle's central hydraulic system. This model went on to sell 1.5 million units over 20 years with the same brake setup.

The Jensen 541, with four-wheel disc brakes, followed in 1956.

Disc brakes were most popular on sports cars when they were first introduced, since these vehicles are more demanding about brake performance. Discs have now become the more common form in most passenger vehicles, although many (particularly light weight vehicles) use drum brakes on the rear wheels to keep costs and weight down as well as to simplify the provisions for a parking brake. As the front brakes perform most of the braking effort, this can be a reasonable compromise.

Many early implementations for automobiles located the brakes on the inboard side of the driveshaft, near the differential, while most brakes today are located inside the wheels. An inboard location reduces the unsprung weight and eliminates a source of heat transfer to the tires.

Historically, brake discs were manufactured throughout the world with a strong concentration in Europe and America. Between 1989 and 2005, manufacturing of brake discs migrated predominantly to China.

2016-09-27 23:56:04
主站蜘蛛池模板: 综合久久一区二区三区| 亚洲精品www久久久久久广东| 97精品久久人人爽人人爽| 91视频国产九色| 日韩国产精品一区二区| 国产精品久久久久久久四虎电影| 久久综合二区| 日本免费电影一区二区| 乱子伦农村| 伊人久久婷婷色综合98网| 国产欧美一区二区三区在线看| 国产91免费观看| 99久久精品免费看国产交换| 狠狠色噜噜狠狠狠狠88| 美女被羞羞网站视频软件| 国语精品一区| 国产69精品久久久久久久久久| 少妇久久精品一区二区夜夜嗨| 久久国产视屏| 亚洲精品国产精品国自| 欧美乱码精品一区二区三| 国产专区一区二区| 99国产精品一区二区| 亚洲精品日韩在线| 国产精品美女一区二区视频| 国产经典一区二区| 亚洲精品国产一区二区三区| 夜夜躁狠狠躁日日躁2024| 国产一区二区精品免费| 色午夜影院| 久草精品一区| 久久精品国产久精国产| 免费看欧美中韩毛片影院| 满春阁精品av在线导航 | 日本久久丰满的少妇三区| 年轻bbwwbbww高潮| 又黄又爽又刺激久久久久亚洲精品| 亚洲精品www久久久| 欧美一区二区三区免费视频| 中文字幕一级二级三级| 欧美在线视频一区二区三区| 四虎国产永久在线精品| 538国产精品一区二区免费视频| 国产午夜精品av一区二区麻豆| 欧美乱码精品一区二区三| 欧美片一区二区| 国产视频一区二区视频| 欧美日韩亚洲国产一区| 精品91av| 久久福利免费视频| 一区二区三区欧美在线| 97国产精品久久久| 中文在线一区二区三区| 91一区二区在线观看| 国久久久久久| 午夜影院5分钟| 亚洲精品卡一卡二 | 狠狠色狠狠色综合久久第一次| 国产精品欧美一区二区三区| 午夜影院毛片| 狠狠色噜噜狠狠狠888奇米| 亚洲s码欧洲m码在线观看| 中文字幕欧美日韩一区| 国产九九九精品视频| 亚洲乱亚洲乱妇50p| 996久久国产精品线观看| 免费91麻豆精品国产自产在线观看| 国产精品1区二区| 国产欧美一区二区精品久久久| 色吊丝av中文字幕| 国产精品一区二区麻豆| 欧美精品国产精品| 亚洲精品www久久久久久广东 | 亚洲少妇一区二区| 亚洲欧美国产中文字幕| 日韩精品一区二区av| 欧美午夜一区二区三区精美视频| 国产精品一区二区6| 国产性猛交xx乱| 国产韩国精品一区二区三区| 国产精品九九九九九九九| 99久久精品免费看国产免费粉嫩|