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: free×性护士vidos欧美| 久久久久亚洲最大xxxx| 日韩精品久久久久久久的张开腿让| 鲁丝一区二区三区免费| 国产精品9区| 国产精品免费专区| 96精品国产| 99精品区| 国产精品人人爽人人做av片| 欧美一区二区三区精品免费| 国模一区二区三区白浆| 国产一区二区三区伦理| 一级黄色片免费网站| 91精品久久久久久综合五月天| 一本色道久久综合亚洲精品浪潮| 久久91精品国产91久久久| 久久精品com| 99精品久久99久久久久| 国产精品1区二区| 97一区二区国产好的精华液| 精品国产乱码久久久久久虫虫| 亚洲精品久久久久玩吗| 日本三级韩国三级国产三级| 6080日韩午夜伦伦午夜伦| 午夜影院试看五分钟| 国产一区三区四区| 久久国产中文字幕| 欧美综合在线一区| 国产欧美一区二区三区四区| 久久五月精品| 午夜精品在线观看| 99久久国产免费| 一区二区三区欧美视频| 日韩av中文字幕在线免费观看| 中文字幕一级二级三级 | 麻豆天堂网| 欧美一区二区三区久久久| 亚洲午夜久久久久久久久电影院| 狠狠色噜噜狠狠狠狠综合久| 国产精品欧美一区二区三区奶水| 国产精品亚洲第一区| 国产99久久九九精品免费| 国产欧美日韩另类| 国产理论一区| 久99久视频| 日本一区二区免费电影| 少妇太爽了在线观看免费| 岛国黄色av| 欧美精品国产一区| 大伊人av| 午夜理伦影院| 国产美女视频一区二区三区| 国产区图片区一区二区三区| 国产精品亚洲第一区| 国产69精品久久久久777糖心| 欧美日韩亚洲国产一区| 欧美一区二区激情三区| 91精品国产综合久久国产大片| 扒丝袜网www午夜一区二区三区| 国产999在线观看| 欧美激情精品一区| 精品久久久久久中文字幕大豆网 | 精品久久久久久中文字幕| 国产网站一区二区| 欧美在线观看视频一区二区| 少妇bbwbbwbbw高潮| 午夜影院啊啊啊| 综合色婷婷一区二区亚洲欧美国产 | 欧美日韩中文字幕一区| 欧美日韩乱码| 欧美日韩国产91| 中文字幕在线一区二区三区| 91看片app| 久久国产这里只有精品| 亚洲欧美另类综合| 日本美女视频一区二区| 久久天天躁狠狠躁亚洲综合公司| 乱淫免费视频| 久久精品国产99| 好吊妞国产欧美日韩免费观看网站| 久久九九国产精品| 国产理论片午午午伦夜理片2021|