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: 99久久夜色精品国产网站| 热re99久久精品国99热蜜月| 国产69精品99久久久久久宅男| 欧美视屏一区二区| 狠狠色噜噜狠狠狠狠米奇7777| 李采潭伦理bd播放| 中文字幕在线乱码不卡二区区| 欧美精品久| 日本99精品| 一区二区三区四区视频在线| 午夜影院毛片| 国产一区二区国产| 国产亚洲精品久久久久动| 对白刺激国产对白精品城中村| 91久久精品在线| 粉嫩久久久久久久极品| 国产在线播放一区二区| 少妇厨房与子伦免费观看| 国产在线卡一卡二| 一级久久久| 国产精品视频99| 亚洲乱码一区二区三区三上悠亚| 欧美三级午夜理伦三级老人| 91国偷自产中文字幕婷婷| 91理论片午午伦夜理片久久| 国产高清在线精品一区二区三区 | 88国产精品视频一区二区三区 | 在线观看欧美一区二区三区| 国产99视频精品免费视频7| 99视频一区| 国产精品久久久久久久久久久久久久久久| 国产精品一区二区av日韩在线| 国产精品一区二区毛茸茸| 高清人人天天夜夜曰狠狠狠狠| 国产精品久久久久久久久久久久久久不卡 | 欧美黄色一二三区| 欧美国产亚洲精品| 日本一二三区视频在线| 午夜精品一区二区三区三上悠亚 | 久久精品国产综合| 国产伦高清一区二区三区| 欧美一区二区三区艳史| 国产高清精品一区二区| 欧美精品一区二区久久久| 久久久精品欧美一区二区| 中文字幕久久精品一区| 久久99视频免费| 国产一区二区三区影院| 91精品一区| 国产一区www| 国产69精品久久99的直播节目| 夜夜夜夜夜猛噜噜噜噜噜gg| 91精品视频一区二区三区| 中文字幕欧美久久日高清| 日本一区二区在线电影| 日韩一级免费视频| 中文字幕欧美一区二区三区 | 国产91清纯白嫩初高中在线观看 | 午夜叫声理论片人人影院| 亚洲福利视频一区| 午夜爽爽视频| 国产91麻豆视频| 亚洲国产午夜片| 狠狠躁日日躁狂躁夜夜躁| 日韩精品福利片午夜免费观看| 久久99亚洲精品久久99| 亚洲区在线| 91久久精品国产91久久性色tv| 粉嫩久久久久久久极品| 久久国产精品麻豆| 久久综合伊人77777麻豆最新章节| 97精品国产aⅴ7777| 久久99精品国产麻豆婷婷洗澡 | 午夜一区二区三区在线观看| 国产精品视频久久久久久久| 日本一区二区在线电影| 91精品综合| 久久综合久久自在自线精品自| 肥大bbwbbwbbw高潮| 久久久久国产亚洲日本| 欧美三级午夜理伦三级中视频 | 国产精品二十区|