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: 狠狠色噜噜狠狠狠合久| 4399午夜理伦免费播放大全| 欧美hdfree性xxxx| 丰满岳乱妇bd在线观看k8| 日韩欧美中文字幕一区| 免费看欧美中韩毛片影院| 亚洲国产精品一区在线| 久久一区二区视频| 国产日韩欧美一区二区在线观看 | 亚洲无人区码一码二码三码 | 在线中文字幕一区| 亚洲国产精品国自产拍久久| 亚洲福利视频一区| 亚洲二区在线播放视频| 2021天天干夜夜爽| 二区三区免费视频| 日韩精品久久久久久久电影99爱| 欧美极品少妇xx高潮| 性欧美激情日韩精品七区| 午夜wwww| 亚洲欧美一区二区三区不卡| 麻豆国产一区二区| 国产精品久久久视频| 日本丰满岳妇伦3在线观看| 中文乱码在线视频| 国产一二区精品| 国产精品一区二区在线看| 蜜臀久久久久久999| 午夜黄色大片| 91麻豆精品国产91久久久无限制版| 国产精品69久久久| 精品videossexfreeohdbbw| 午夜一区二区三区在线观看| 国产视频一区二区视频| 日韩一级在线视频| 国产精彩视频一区二区| 亚洲国产精品美女| 国产精品一区二区6| 91丝袜国产在线播放| 99久久精品国| 亚洲1区2区3区4区| 国产精品日韩三级| 亚洲精品日韩激情欧美| 国产精品5区| 国产一区中文字幕在线观看| **毛片免费| 午夜叫声理论片人人影院| 国产91九色在线播放| 国产精品高潮呻吟88av| 欧美日韩国产三区| 日韩精品中文字| 一区二区三区精品国产| 国产午夜精品av一区二区麻豆| av午夜剧场| 色噜噜狠狠色综合影视| 亚洲国产精品日本| 国产精品伦一区二区三区在线观看 | xxxx18hd护士hd护士| 91久久国产露脸精品国产| 满春阁精品av在线导航| 久久精品国语| 综合久久国产九一剧情麻豆| 国产精品伦一区二区三区级视频频 | 挺进警察美妇后菊| 国产精品一区二区毛茸茸| 国产伦精品一区二| 中文字幕一区二区三区四| 窝窝午夜理伦免费影院| 精品国产乱码久久久久久影片| 李采潭伦理bd播放| 91狠狠操| 91在线一区二区| 色综合久久久久久久粉嫩| 99久久久国产精品免费无卡顿| 亚洲乱视频| 国产女人和拘做受在线视频| 欧美日韩一区二区三区四区五区六区 | 国语对白老女人一级hd| 最新国产精品久久精品| 国产伦精品一区二区三区免费下载 | 日本xxxxxxxxx68护士 | 国产色一区二区|