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: 国产在线拍偷自揄拍视频| 欧美日韩一区二区在线播放| 欧美精品五区| 国产伦精品一区二区三区四区| 欧美精品国产精品| 精品国产乱码久久久久久a丨| 中文字幕一区三区| 国产高清精品一区二区| 国产精品久久久久久亚洲美女高潮| 野花国产精品入口| 狠狠色狠狠色综合系列| 国产精品理人伦一区二区三区| 国内偷拍一区| 少妇bbwbbwbbw高潮| 日韩三区三区一区区欧69国产 | 日韩精品免费一区二区夜夜嗨| 91麻豆精品国产91久久久更新资源速度超快 | 国产区精品| 最新av中文字幕| 欧美精品免费视频| 精品国产鲁一鲁一区二区作者| 久久精品色欧美aⅴ一区二区| 国产精品麻豆99久久久久久| 久久久一二区| 亚洲国产欧洲综合997久久,| 91精品国产九九九久久久亚洲| 欧美69精品久久久久久不卡| 色噜噜狠狠色综合影视| 5g影院天天爽入口入口| 日本一区二区高清| 国产欧美一区二区三区视频| 性生交大片免费看潘金莲| 国产日韩欧美91| 蜜臀久久99静品久久久久久| 国产乱色国产精品播放视频| 欧美日韩一级二级| 97久久国产精品| 精品国产亚洲一区二区三区| 亚洲国产精品美女| 午夜伦全在线观看| 欧美日韩久久一区| 国模少妇一区二区三区| 国产午夜一区二区三区| 国产99久久久国产精品免费看| freexxxx性| 日本边做饭边被躁bd在线看| 午夜剧场一级片| 88国产精品视频一区二区三区| 亚洲精品国产setv| 欧美日韩国产专区| 99精品少妇| 国产精品久久久久久久久久久久冷| 日韩不卡毛片| 国产精品久久久久久久久久嫩草| 日韩av免费网站| 久久一区二区精品视频| 亚洲va国产2019| 国产一区二区免费在线| 国产人成看黄久久久久久久久| 日韩精品久久久久久久酒店| 国产区图片区一区二区三区| 一本色道久久综合亚洲精品图片| 欧美三级午夜理伦三级老人| 午夜av资源| 日韩国产精品一区二区| 欧美久久精品一级c片| 欧美乱妇高清无乱码| 精品一区二区三区视频?| 欧美一区二区三区久久| 性生交大片免费看潘金莲| 国产精品免费自拍| 亚洲国产精品一区二区久久,亚洲午夜| 午夜影院毛片| 蜜臀久久99精品久久久| 99精品欧美一区二区三区美图| 久久福利视频网| 一级午夜电影| 综合久久国产九一剧情麻豆| 久久久久久久国产精品视频| 国产69精品久久久久777| 不卡在线一区二区| 91亚洲欧美强伦三区麻豆|