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: 中文字幕一区2区3区| 欧美日韩中文不卡| 精品国产一区二区三区高潮视 | 欧美日韩中文不卡| 精品国产乱码久久久久久影片| 亚洲日韩欧美综合| 国产午夜精品一区二区三区四区| xxxx国产一二三区xxxx| 色一情一乱一乱一区免费网站 | 亚洲欧洲日韩在线| 精品国产18久久久久久依依影院| 国产中文字幕一区二区三区| 日本不卡精品| 欧美久久一区二区三区| 久久精品欧美一区二区| 国产一区在线免费| 国产精品久久久久久久久久久杏吧| 国产精品免费不卡| 国产女人好紧好爽| 国产69精品久久久久app下载| 久久久一二区| 欧美日韩精品中文字幕| 久久精品手机视频| 中文字幕一区二区三区免费| 日韩欧美中文字幕精品| 午夜裸体性播放免费观看| 日韩亚洲精品视频| 国产在线精品一区二区| 狠狠色噜噜狠狠狠狠88| 激情久久综合| 国产第一区在线观看| 狠狠色狠狠综合久久| 精品国产一区二区三区久久久久久 | 国产精品v欧美精品v日韩| 91精品久久久久久综合五月天 | 强制中出し~大桥未久10在线播放| 麻豆视频免费播放| 国产精品一区二区在线看| 国产九九影院| 欧美激情片一区二区| 精品少妇的一区二区三区四区 | 国产一区二区三区小说| 久久国产精久久精产国| 国产精品日韩电影| 国产日韩一区二区三区| 久久一级精品| 国产免费区| 色吊丝av中文字幕| 国产精品久久久久久久久久久杏吧| 国内自拍偷拍一区| 狠狠躁夜夜躁人人爽天天天天97| 一区二区在线精品| 中文文精品字幕一区二区| 99久久免费毛片基地| 亚洲精华国产欧美| 91看片app| 欧美精品一区二区三区久久久竹菊| 日韩精品一区二区av| 国产精品一卡二卡在线观看| 欧美精品在线视频观看| 亚洲精品久久久久www| 欧美综合国产精品久久丁香| 国产欧美日韩一级| 精品无码久久久久国产| 一本色道久久综合亚洲精品浪潮| 免费观看又色又爽又刺激的视频| 国产精品一区二区毛茸茸| 国产一区精品在线观看| 国产精欧美一区二区三区久久| 国产精品一二三四五区| 国产一区二区三区乱码| 国产精品一级片在线观看| 91麻豆精品国产自产欧美一级在线观看 | 19videosex性欧美69| 国产麻豆一区二区三区在线观看| 乱子伦农村| 国产999精品久久久久久绿帽| 欧美黑人巨大久久久精品一区| 亚洲精品日韩在线| 国产亚洲精品精品国产亚洲综合 | 亚洲无人区码一码二码三码 | 久久99国产综合精品|