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: 亚洲精品国产setv| 午夜666| 99国产精品一区| 国产精品日本一区二区不卡视频| 精品国产二区三区| 麻豆9在线观看免费高清1| 国产精品久久久视频| 91精品国模一区二区三区| 午夜剧场a级片| 91视频国产一区| 国产一级片大全| 999久久久国产精品| 欧美二区在线视频| 欧美日韩精品在线一区二区| 亚洲欧美自拍一区| 91热精品| 91国内精品白嫩初高生| 一区二区三区精品国产| 好吊妞国产欧美日韩免费观看网站| 午夜一二区| 男女午夜爽爽| 国产日韩欧美自拍| 久久精品99国产精品亚洲最刺激| 中文字幕一区二区三区乱码视频| 亚洲欧洲日韩在线| 性视频一区二区三区| 精品国产九九| 国产在线一区观看| 97视频精品一二区ai换脸| 国产精品久久久久久久久久久杏吧| 一区二区三区日韩精品| 国产精品96久久久| 国产在线视频二区| 午夜欧美影院| 亚洲四区在线| 国产呻吟久久久久久久92 | 狠狠色综合久久婷婷色天使 | 在线视频不卡一区| 国产精品国产三级国产播12软件 | 亚洲欧美日韩在线看| 午夜影院啊啊啊| 亚洲国产偷| 久久精品国产99| 国产一区二区伦理片| 国内久久久| 日本一二三四区视频| 国产高清一区二区在线观看| 欧美一区二三区人人喊爽| 挺进警察美妇后菊| 国产精品网站一区| 四虎国产精品永久在线| 久久久精品欧美一区二区免费| 激情久久久| 国产精品乱码久久久久久久| 亚洲精品一区中文字幕| 欧美日韩亚洲另类| 久久久999精品视频| 国产在线拍偷自揄拍视频| 国产v亚洲v日韩v欧美v片| 日韩精品中文字幕一区二区| 国产午夜亚洲精品| 狠狠色狠狠色综合日日2019| 欧美日韩国产欧美| 久久青草欧美一区二区三区| 国产精品一级在线| 亚洲精品久久久久中文第一暮| 久久久午夜爽爽一区二区三区三州| 久久二区视频| 99re久久精品国产| 亚州精品中文| 国产亚洲精品久久久久动| 欧美在线视频一二三区| 中文字幕在线一区二区三区| 日韩精品一区二区三区中文字幕| 99久久国产免费| 亚洲高清久久久| 欧洲在线一区二区| 欧美精品日韩| 国产午夜精品av一区二区麻豆| 国产v亚洲v日韩v欧美v片| 中文av一区| 亚洲精品少妇一区二区 |