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: 国产精品日韩一区二区三区| 国产一区网址| 午夜av男人的天堂| 91波多野结衣| 69久久夜色精品国产7777| 国产三级国产精品国产专区50| 欧美日韩一区二区在线播放| 国产理论一区| 国产精品视频免费看人鲁| 久久夜色精品国产亚洲| 欧美乱妇高清无乱码| 99久精品视频| 国产精品欧美久久| 国产精品无码专区在线观看| 少妇久久精品一区二区夜夜嗨| 久久99精品国产麻豆婷婷| 精品国产一区二区三区久久久久久| 国产88久久久国产精品免费二区| 草逼视频网站| 又色又爽又大免费区欧美| 亚洲一二三在线| 久久综合国产精品| 狠狠躁夜夜躁xxxxaaaa| 99久久婷婷国产综合精品草原| 午夜大片男女免费观看爽爽爽尤物| 一区二区三区国产精华| 欧美日韩国产在线一区二区三区| 玖玖爱国产精品| 国产精品久久久久久久久久不蜜月| 午夜精品99| 欧美一区二区三区久久久精品| 国产精品一区二区在线观看免费| 欧美日韩国产一二三| 国产亚洲欧美日韩电影网| 狠狠色噜狠狠狠狠| 日本看片一区二区三区高清| xx性欧美hd| 久久夜色精品久久噜噜亚| 亚洲国产精品97久久无色| 国产一区二区三区精品在线| 国产女人好紧好爽| 中文无码热在线视频| 国产在线一区二区视频| 日韩av一二三四区| 在线国产二区| 一区二区中文字幕在线观看| 国产乱人伦偷精品视频免下载| 99精品国产一区二区三区不卡| 97精品久久久午夜一区二区三区| 97精品国产aⅴ7777| 欧美hdxxxx| 精品国产乱码久久久久久久| 国产91电影在线观看| 国产一区免费在线观看| 亚洲国产欧美一区| 国产精品久久久久久久久久久杏吧| 亚洲区在线| 亚洲精品一区二区另类图片| 国产农村妇女精品一区二区| 国产精品亚洲欧美日韩一区在线| 99久久夜色精品国产网站| 亚洲精品456| 97涩国一产精品久久久久久久| 欧美极品少妇videossex| 性欧美1819sex性高播放| 偷拍久久精品视频| 黄色国产一区二区| 国产精品久久久久久久久久久久久久不卡 | 日韩一区二区福利视频| 精品在线观看一区二区| 国产精品999久久久| 国产婷婷色一区二区三区在线| 91麻豆文化传媒在线观看| 国产欧美一区二区三区四区| 国产精品视频一区二区三| 91麻豆精品国产91久久久更新时间| 性old老妇做受| 国产影院一区二区| 国产一卡在线| 精品久久一区| 香蕉视频在线观看一区二区| 97视频久久久|