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: 精品国产亚洲一区二区三区| 999亚洲国产精| 一区二区久久精品66国产精品| 日日狠狠久久8888偷色| 视频二区一区国产精品天天| 久久国产欧美日韩精品| 欧美hdfree性xxxx| 国产免费区| 久久久久久亚洲精品| 91婷婷精品国产综合久久| 99久久夜色精品| 国产va亚洲va在线va| 国产aⅴ一区二区| 欧美精品中文字幕在线观看| 8x8x国产一区二区三区精品推荐| 国产在线一卡| 日韩精品久久一区二区三区| 国产精品一二三区免费| 久久精品入口九色| 91婷婷精品国产综合久久| 91精品夜夜| 99国产超薄丝袜足j在线观看| 国产一区二区资源| 日韩精品中文字幕久久臀| 国产欧美亚洲精品| 欧美日韩综合一区二区| 国产无遮挡又黄又爽免费网站| 国产一区二区在| 91高跟紫色丝袜呻吟在线观看| 中文在线√天堂| 亚洲精品一区二区三区香蕉| 91午夜在线观看| 福利电影一区二区三区| 国产一区二区精品免费| 日本午夜一区二区| 国产精品对白刺激在线观看 | 国产精品自产拍在线观看桃花| 狠狠色噜噜狠狠狠狠| 日日夜夜一区二区| 日韩一级精品视频在线观看| 欧美精选一区二区三区| 午夜激情在线免费观看| 国产一区影院| 狠狠色噜噜狠狠狠狠2021天天 | 国产精品对白刺激在线观看| 国产欧美一区二区精品婷| 亚洲国产一区二区精华液| 欧美日韩一区二区三区在线观看视频| 亚洲欧洲日韩在线| 浪潮av色| 久久99视频免费| 国产videosfree性另类| 久久婷婷国产麻豆91天堂徐州| 久久综合伊人77777麻豆最新章节| 国产精品中文字幕一区二区三区| 国产一区中文字幕在线观看| 一区二区三区免费高清视频| 国产欧美一区二区精品性色超碰| 国产一区二区91| 国产一区在线免费观看| 一本色道久久综合亚洲精品浪潮| 一区二区在线国产| 少妇高潮一区二区三区99小说| 亚洲精品久久久久玩吗| 日韩精品一区二区亚洲| 国产麻豆一区二区| 一区二区三区国产精品视频| 午夜欧美a级理论片915影院| 国产午夜精品一区| 欧美日韩国产123| 国产精品视频二区三区| 97国产精品久久| 一区二区在线精品| 国产1区2区3区中文字幕| 国产在线精品二区| 日本一区午夜艳熟免费| 国产欧美精品一区二区三区小说| 亚洲国产欧美一区| 99爱精品视频| 国产精品v欧美精品v日韩| 久久精品一区二区三区电影| 一区二区在线国产|