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: 久久综合二区| 国内精品久久久久影院日本 | 精品国产一区二| 清纯唯美经典一区二区| 国产精品久久二区| 美女啪啪网站又黄又免费| 99精品国产一区二区三区麻豆 | 国产视频二区在线观看| 91精品婷婷国产综合久久竹菊 | 91av一区二区三区| 99日韩精品视频| 538在线一区二区精品国产| 狠狠色噜噜综合社区| 欧美一区二区三区久久精品视 | 欧美精品八区| www.午夜av| 国产精品视频一区二区二| 国产日韩欧美91| 北条麻妃久久99精品| 日本五十熟hd丰满| 亚洲1区在线观看| 男女无遮挡xx00动态图120秒| 午夜无遮挡| 国产69精品久久久久777糖心| 国产一区二区精品免费| 亚洲精品少妇久久久久| 国产一区二区播放| 老太脱裤子让老头玩xxxxx| 一级久久久| 日韩欧美中文字幕精品| 一本大道久久a久久精品| 国产精品美女一区二区视频| 99久久国产综合精品尤物酒店| 日本二区在线观看| 日韩av视屏在线观看| 国产在线视频99| 国产日韩欧美亚洲| 国产一区二区极品| 欧美在线免费观看一区| 狠狠插狠狠干| 久久福利免费视频| 四虎国产精品永久在线国在线 | 欧美精品一区久久| 欧美67sexhd| 亚洲精品一品区二品区三品区 | 91精品一区二区在线观看| 亚洲欧美日韩视频一区| 国产精品久久免费视频| 欧美日韩一级黄| 97欧美精品| 午夜肉伦伦| 欧洲精品一区二区三区久久| 国产理论片午午午伦夜理片2021| 高清欧美精品xxxxx| 久久精品综合| 日韩av中文字幕在线免费观看| 国产一区在线精品| 亚洲一区中文字幕| 国产三级欧美三级日产三级99| 国产欧美一区二区三区免费看| 亚洲国产精品网站| 亚洲国产精品入口| 亚洲国产精品第一区二区| 久久国产欧美一区二区三区精品| 久久久久久久国产| 国产日韩精品一区二区| 国产第一区二区三区| 奇米色欧美一区二区三区| 久久久精品二区| 香港三日本8a三级少妇三级99 | 欧美日韩一区二区三区不卡视频| 精品少妇一区二区三区免费观看焕 | 久草精品一区| 日韩av在线导航| 日本午夜精品一区二区三区| 中文字幕在线一二三区| 日韩av免费网站| 91精品久久久久久综合五月天 | 欧美日韩亚洲另类| 亚洲少妇一区二区| 久久综合久久自在自线精品自| 久久96国产精品久久99软件|