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: 国产伦理久久精品久久久久| 亚洲国产精品第一区二区| 最新国产一区二区| 久久夜靖品2区| 久久久久久亚洲精品中文字幕| 久久99精品国产麻豆婷婷| 91精品夜夜| 久久精品综合视频| 国产在线一区二区视频| 国产视频一区二区不卡| sb少妇高潮二区久久久久| 亚洲精品久久久久中文字幕欢迎你 | 日韩中文字幕在线一区二区| 日韩美一区二区三区| 欧美日韩一区二区三区不卡视频| 欧美一区二区三区久久综合| 欧美xxxxxhd| 国产欧美一区二区精品性| 日韩中文字幕亚洲欧美| 精品福利一区| 国产精品美女一区二区视频| 免费欧美一级视频| xxxx18hd护士hd护士| 99精品国产一区二区三区不卡 | 久久综合伊人77777麻豆| 中文字幕在线播放一区| 国产一区二区精华| 88国产精品视频一区二区三区 | 中文字幕一级二级三级| 狠狠躁夜夜躁| 精品国产一区二区三区高潮视| 国产精品综合久久| www色视频岛国| 日韩av不卡一区| 超碰97国产精品人人cao| 国产精品一区二区毛茸茸| 亚洲无人区码一码二码三码| 欧美精品一区二区三区视频| 国产色99| 欧美视屏一区| 亚洲乱强伦| 亚洲精品日韩在线| 久久人做人爽一区二区三区小说| 中文在线一区二区三区| 亚洲欧美另类久久久精品2019| 国产日韩欧美一区二区在线观看 | 亚洲精品久久在线| 国产精品久久久久久亚洲调教| xx性欧美hd| 国产精品日韩一区二区三区| 精品国产乱码久久久久久软件影片| 国产91高清| 69久久夜色精品国产69乱青草 | 狠狠色噜噜狠狠狠合久| 国产精品日韩视频| 国产精品1区2区| 久久影院一区二区| 国产精品96久久久久久又黄又硬| 91精品一区二区在线观看| 久久97国产| 亚洲国产美女精品久久久久∴| 97久久久久亚洲| 国产麻豆精品久久| 91香蕉一区二区三区在线观看| 国产麻豆精品久久| 中文字幕一区二区三区日韩精品| 国产69精品久久久久999天美| 高清欧美精品xxxxx| 日韩久久影院| 国产一区二区免费在线| 99久久免费精品国产男女性高好| 亚洲欧美日本一区二区三区 | 国产伦高清一区二区三区| 欧美高清xxxxx| 午夜伦理片在线观看| 色婷婷精品久久二区二区我来| 国产精品九九九九九九九| 日韩午夜电影在线| 国产足控福利视频一区| _97夜夜澡人人爽人人| 国产午夜一区二区三区| 国产黄一区二区毛片免下载|