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: 91波多野结衣| 欧美精品一级二级| 亚洲国产午夜片| 手机看片国产一区| 鲁丝一区二区三区免费观看| 欧美日韩国产精品一区二区三区| 精品久久综合1区2区3区激情| 中文字幕制服狠久久日韩二区 | 国产视频1区2区| 日本一码二码三码视频| 国产丝袜一区二区三区免费视频| 国产精品一区二区日韩新区| 精品一区欧美| 国产一区二区电影| 国产清纯白嫩初高生视频在线观看| 日韩av在线播放网址| 999久久久国产| 国产日韩麻豆| 狠狠躁天天躁又黄又爽| 欧美精品免费视频| 少妇高潮ⅴideosex| 亚洲国产偷| 国产精品二十区| 国产女人与拘做受免费视频| 淫片免费看| 香港三日本三级三级三级| 国产亚洲精品久久网站| а√天堂8资源中文在线| 免费久久一级欧美特大黄| 国产精品国产三级国产专区55| 香蕉视频在线观看一区二区| 国产一区日韩欧美| 亚洲区在线| 国产精品久久亚洲7777| 久久国产精久久精产国| 日韩中文字幕在线一区| 久久国产精品久久久久久电车| 68精品国产免费久久久久久婷婷| 精品国产一区二区三区高潮视| 欧美一区二区三区免费观看视频| 国产一区二区三区黄| 亚洲精品国产精品国产| 日本高清二区| 国产区二区| 亚洲欧美日韩精品suv| 欧美日韩一区二区三区不卡视频| 午夜电影三级| 狠狠干一区| 91精品啪在线观看国产手机 | 午夜爽爽爽男女免费观看 | 一区二区在线视频免费观看 | 国产精品不卡在线| 欧美一区二区三区白人| 日本边做饭边被躁bd在线看| 国产精品日产欧美久久久久| 在线观看国产91| 国产精品久久久久久久久久软件| 国产精品视频tv| 欧美日韩精品影院| 亚洲国产精品综合| 久久久久国产精品一区二区三区| 亚洲精品国产精品国自| 香蕉av一区二区三区| 色婷婷久久一区二区三区麻豆| 国产精品一二三在线观看| 日韩精品中文字幕一区二区三区| 亚洲国产精品一区在线| 91九色精品| 久久精品麻豆| xxxxhd欧美| 欧美精品久久一区二区| 日韩av在线网址| 中文丰满岳乱妇在线观看| 强制中出し~大桥未久在线播放| 欧美日韩国产色综合一二三四| 狠狠色噜噜狠狠狠狠| 国产午夜精品一区| 久久久久国产亚洲日本| 国产福利精品一区| 久久69视频| 热99re久久免费视精品频软件 | 午夜免费网址|