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: 99国产精品99久久久久| 国产一区二区电影在线观看| 91一区二区三区视频| www.日本一区| 国产.高清,露脸,对白| 国产一区二区三区乱码| 久久人人爽爽| 亚洲国产精品精品| 少妇自拍一区| 中文字幕视频一区二区| 午夜毛片影院| 国产乱了高清露脸对白| 国产另类一区| 日韩av视屏在线观看| 大bbw大bbw巨大bbw看看| 国产欧美一区二区精品婷| 91avpro| 亚洲精品suv精品一区二区| 综合久久色| 亚洲欧美日本一区二区三区| 久久久久久国产精品免费| 狠狠色噜噜狠狠狠狠米奇777| 中文字幕日韩一区二区| 91一区在线| 欧美精品第一区| 久久影院一区二区| 国产精品亚洲二区| 久久精视频| 97欧美精品| 91一区二区三区在线| 中文字幕一级二级三级| 夜色av网站| 欧美日韩一区在线视频| 97精品超碰一区二区三区| 久久综合伊人77777麻豆最新章节 一区二区久久精品66国产精品 | 精品日韩久久久| 午夜wwww| 97久久国产亚洲精品超碰热 | 国产精品久久久综合久尹人久久9| 午夜影院试看五分钟| 蜜臀久久久久久999| 国产精品久久久久久久久久不蜜月| 日本精品一二三区| 69精品久久| 欧美精品第1页| 国产亚洲精品久久久久久网站| 又色又爽又大免费区欧美| 国内精品久久久久久久星辰影视 | 久久99国产精品视频| 福利片午夜| 热久久国产| 大桥未久黑人强制中出| 午夜肉伦伦| 精品一区二区三区影院| 国产精品日韩一区二区三区| 性生交大片免费看潘金莲| 欧美激情在线观看一区| 久久综合二区| 欧美乱偷一区二区三区在线| 国产一区二区综合| 欧美中文字幕一区二区| 浪潮av色| 国产特级淫片免费看| 国产欧美一区二区三区在线播放| 国偷自产中文字幕亚洲手机在线| 欧美高清性xxxxhd| xx性欧美hd| 欧美高清性xxxx| 亚洲乱子伦| 亚洲国产精品国自产拍av| 一区二区在线国产| 一区二区国产盗摄色噜噜| 午夜电影一区| 国产va亚洲va在线va| 国产盗摄91精品一区二区三区| 日韩欧美中文字幕一区| 一区二区久久精品| 综合久久国产九一剧情麻豆| 国产精品videossex国产高清| 国产高清一区在线观看| 一级午夜影院| 欧美69精品久久久久久不卡|