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: 在线观看欧美日韩国产| 亚洲精品国产setv| 高清欧美xxxx| 欧美激情视频一区二区三区| 国产午夜一区二区三区| 国产欧美性| 天天射欧美| 欧美高清性xxxxhdvideos| 精品国产仑片一区二区三区| 欧美高清xxxxx| 国产女人好紧好爽| 色综合久久综合| 久久久久久久亚洲国产精品87| 精品国产乱码久久久久久a丨| 国产精品高潮在线| 国产一级一片免费播放| 青苹果av| 国产69精品久久久久孕妇不能看| 99久久国产综合精品尤物酒店| 久久99精品国产一区二区三区| 国产69精品久久久久999小说| 99三级视频| 国产精品自拍在线观看| 亚洲欧美色一区二区三区| 日韩国产精品久久| 6080日韩午夜伦伦午夜伦| 精品国产一区二| 夜色av网站| 福利片91| 中文字幕一区三区| 浪潮av色| 91久久香蕉| 国产大片黄在线观看私人影院| 日韩精品一区二区中文字幕| 99精品久久99久久久久| 91亚洲欧美强伦三区麻豆| 欧美精品中文字幕在线观看| 91久久综合亚洲鲁鲁五月天| 小萝莉av| 国产九九影院| 欧美激情片一区二区| 夜夜嗨av一区二区三区中文字幕 | 日韩精品一区二区免费| 国产区91| 欧美日韩国产区| 午夜老司机电影| 久久伊人色综合| 日韩亚洲欧美一区二区| 综合久久国产九一剧情麻豆| 久爱精品视频在线播放| 午夜无人区免费网站| 欧美精品一区二区久久久| 黄色av中文字幕| 在线国产一区二区三区| 亚洲国产欧美一区二区三区丁香婷 | 538国产精品一区二区免费视频| 国产69精品久久久久777| 久99久精品| 狠狠躁夜夜躁人人爽天天天天97| 好吊妞国产欧美日韩免费观看网站| 午夜影院5分钟| 狠狠搞av| 一区二区在线视频免费观看| 国产床戏无遮挡免费观看网站| 精品国产一区在线| 亚洲欧美日韩视频一区| 97精品国产97久久久久久免费| 免费观看又色又爽又刺激的视频 | 亚洲va久久久噜噜噜久久0| 欧美髙清性xxxxhdvid| 欧美激情精品久久久久久免费 | 欧美一区久久| 一级女性全黄久久生活片免费 | 色午夜影院| 国产1区2区3区| 欧美精品免费看| 粉嫩久久99精品久久久久久夜| 狠狠色狠狠色综合日日五| 欧美国产一二三区| 国产精品一区二区av日韩在线| 制服丝袜视频一区| 亚洲国产精品一区二区久久hs |