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: 日本亚洲国产精品| 丝袜脚交一区二区| 久久91久久久久麻豆精品| 久久久久一区二区三区四区| 国产亚洲精品久久久久秋霞| 私人影院av| 一区不卡av| 九色国产精品入口| 日韩欧美激情| 午夜激情在线| 一区二区三区在线观看国产| 狠狠色噜噜狠狠狠狠2021免费| av毛片精品| 一区二区久久精品| 51区亚洲精品一区二区三区| 性色av香蕉一区二区| 久久精品视频偷拍| 亚洲精品国产一区| 国产精品久久久av久久久| 欧美视屏一区| 国产精品偷伦一区二区| 久久精品亚洲精品| 爱看av在线入口| 夜夜爽av福利精品导航| 91久久精品国产亚洲a∨麻豆| 国产精品丝袜综合区另类 | 午夜激情影院| 国产91精品高清一区二区三区| 免费a级毛片18以上观看精品| 欧美日韩一区二区三区不卡| 97欧美精品| 91精品久久久久久| 午夜影院你懂的| 久久久久久久亚洲视频| 狠狠色综合久久婷婷色天使| 国产性生交xxxxx免费| 午夜影院啊啊啊| 国产精品天堂网| 鲁丝一区二区三区免费| 国产精品尤物麻豆一区二区三区| 欧美一区二区三区视频在线观看| 国产一区二区三区在线电影| 国产麻豆一区二区| 国产精品偷伦一区二区| 玖玖精品国产| 国产美女视频一区二区三区| 亚洲在线久久| 农村妇女毛片精品久久| 国产性生交xxxxx免费| 午夜毛片在线| 性欧美精品动漫| 丰满岳妇伦4在线观看| 亚洲精品乱码久久久久久麻豆不卡| 国产偷国产偷亚洲清高| 国产日韩欧美精品一区| 国产欧美二区| 精品国产一区二区三区久久久久久| 日韩精品一区二区三区免费观看 | 91看片片| 强制中出し~大桥未久10在线播放| 日本一二三区视频| 亚洲国产视频一区二区三区| 精品免费久久久久久久苍| 日韩欧美国产第一页| 精品免费久久久久久久苍| 国产无遮挡又黄又爽又色视频| 国产www亚洲а∨天堂| 日韩有码一区二区三区| 日韩一级视频在线| 国产二区视频在线播放| 久久久午夜爽爽一区二区三区三州| 国内视频一区二区三区| 日韩欧美激情| 国产精品1区二区| 亚洲欧洲一二三区| 国产91电影在线观看| 久久99国产综合精品| 中文字幕欧美久久日高清| 久久99精品久久久秒播| 国产日韩麻豆| 少妇太爽了在线观看免费| 一区二区欧美视频|