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: 狠狠色狠狠色综合久久第一次| 久久伊人色综合| 97人人澡人人添人人爽超碰| 日韩精品免费一区二区中文字幕| 国产精品不卡一区二区三区| 亚洲精品www久久久久久广东| 国产婷婷一区二区三区久久| 国产美女一区二区三区在线观看| 久久影院一区二区| 精品无码久久久久国产| 日韩精品一区二区三区免费观看视频| 黄色国产一区二区| 国产乱人伦偷精品视频免下载| 欧美乱妇在线视频播放| 午夜在线观看av| 亚洲欧美一区二区三区三高潮| 国产91免费在线| 日韩av中文字幕第一页| 中文字幕国内精品| 国产精品视频久久| 中文字幕av一区二区三区高| 69久久夜色精品国产7777| 亚洲欧美一区二区三区三高潮| 狠狠色狠狠色综合久久第一次| 欧美高清性xxxx| 国产91精品一区二区麻豆亚洲| 欧美视屏一区二区| 国产日韩欧美不卡| 狠狠色噜噜狠狠狠狠88| 国产麻豆91欧美一区二区| 亚洲影院久久| 国产精品乱码一区| 国产精品乱综合在线| 国产欧美亚洲一区二区| 国产大学生呻吟对白精彩在线| 一区二区久久久久| 欧美精品乱码视频一二专区| 亚洲精品一区,精品二区| 国产精品伦一区二区三区视频| 久久激情综合网| 久久一级精品| 视频国产一区二区| 国产欧美一区二区在线| 一区二区欧美视频| 欧美一区二区综合| 亚洲精品欧美精品日韩精品| 国产精品久久久久久久龚玥菲| 国产精品色婷婷99久久精品| 国产一区二区精品在线| 久久精品男人的天堂| 国产精品久久久久久av免费看| xxxx国产一二三区xxxx| 狠狠色狠狠色综合婷婷tag| 欧美日韩国产综合另类| 亚洲va久久久噜噜噜久久0| 搡少妇在线视频中文字幕| 亚洲乱强伦| 99国产精品免费观看视频re| 精品国产一区二区三区四区四| 久久狠狠高潮亚洲精品| 扒丝袜网www午夜一区二区三区| 日日狠狠久久8888偷色| 国产精彩视频一区二区| 曰韩av在线| 精品国产18久久久久久依依影院| 亚洲国产精品一区二区久久hs| 欧洲另类类一二三四区| 欧美乱大交xxxxx| 久久青草欧美一区二区三区| 国产精品中文字幕一区二区三区| 国产在线精品一区二区| 亚洲高清国产精品| 国产欧美日韩二区| 欧美国产三区| 亚洲欧洲一区二区| 91一区二区三区视频| 亚洲欧美另类综合| 精品国产一区二区三区四区四| 久久精品一| 久久精品国产亚洲一区二区| 日韩av在线影院| 免费91麻豆精品国产自产在线观看|