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: 中文字幕欧美日韩一区| 波多野结衣巨乳女教师| 一色桃子av| 国产丝袜一区二区三区免费视频 | 九九热国产精品视频| 欧美一区二区三区爽大粗免费 | 亚洲欧洲另类精品久久综合| 国内精品99| 欧美在线观看视频一区二区| 精品国产乱码久久久久久软件影片| 久久精品欧美一区二区| 国产精品国产三级国产专区55| 国产精品美女久久久免费| 国产一区二区三区小说| 色一情一交一乱一区二区三区 | 精品99在线视频| 日韩一区免费| 亚洲欧美一区二区三区不卡| 欧美系列一区| 国产无遮挡又黄又爽免费网站| 国产91清纯白嫩初高中在线观看| 国产精品九九九九九| 91av一区二区三区| 国产精品一区二区av日韩在线| 日韩精品免费看| 中文av一区| 国产精品色在线网站| 野花国产精品入口| 综合久久激情| 久久夜色精品久久噜噜亚| 欧美日本三级少妇三级久久| 国产视频一区二区视频| 国内少妇偷人精品视频免费| 狠狠色噜噜狠狠狠狠色综合久老司机| 国内精品国产三级国产99| 国产欧美一区二区三区在线| 日本精品一区视频| 福利片91| 国产伦理精品一区二区三区观看体验| 99精品久久99久久久久| 日本精品一区二区三区在线观看视频 | 国产精品视频免费看人鲁| 久久国产精品免费视频| 午夜亚洲影院| 日本丰满岳妇伦3在线观看| 国产精品电影免费观看| 香港日本韩国三级少妇在线观看 | 欧美一区二区三区久久精品视 | 国产欧美日韩在线观看| 中文字幕一区二区三区免费| freexxxx性| 日本高清二区| 日韩一区二区福利视频| 88888888国产一区二区| 一区二区三区欧美在线| 91亚洲精品国偷拍自产| 国产精品日韩视频| 亚洲国产精品区| 欧美一区二区三区爽大粗免费| 国产二区免费视频| 一区二区三区四区视频在线| 欧美激情在线免费| 国产一区二区四区| 日韩精品一区二区免费| 国产精品欧美日韩在线| 国产午夜精品免费一区二区三区视频| 亚洲国产精品区| 综合久久激情| 国产日韩一区二区三区| 国产91精品高清一区二区三区| 国产精品九九九九九九| 国产欧美亚洲精品第一区软件| 精品久久久影院| 国产一区在线视频播放| 欧美精品粉嫩高潮一区二区| 99精品小视频| 91亚洲欧美日韩精品久久奇米色| 欧美一区二区三区激情在线视频 | 综合久久一区| 日韩欧美中文字幕一区| 久久一区二区精品| 国产免费观看一区|