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: 日本高清h色视频在线观看| 日本精品99| 538国产精品一区二区在线| 国产69精品99久久久久久宅男| 天堂av一区二区三区| 欧美一区二区三区久久久| 欧美一区二区色| 国产精品美女一区二区视频| 91片在线观看| 国产一级一区二区| 日韩精品午夜视频| 国产精品v一区二区三区| 中文字幕在线乱码不卡二区区| 国产精品乱码一区二区三区四川人 | 亚洲国产欧美一区二区丝袜黑人| 91久久国产视频| 欧美日韩中文字幕三区| 久久久精品中文| 免费精品一区二区三区第35| 亚洲**毛茸茸| 国产69精品久久久| 日韩一区二区精品| 欧美精品中文字幕在线观看| 色吊丝av中文字幕| 久久国产精品99国产精| 久久夜色精品亚洲噜噜国产mv| 99国产精品久久久久99打野战| 天干天干天干夜夜爽av| 年轻bbwwbbww高潮| 国产欧美一区二区三区免费| 精品久久国产视频| 欧美日韩一级二级三级| 国产精品欧美一区二区视频| 国产亚洲另类久久久精品| 97精品国产97久久久久久| aaaaa国产欧美一区二区| 国产丝袜一区二区三区免费视频| 国产精品天堂网| 欧美日韩一区二区三区免费| 狠狠色依依成人婷婷九月| 国产午夜伦理片| 99热久久这里只精品国产www| 欧美精品xxxxx| 国产真实乱偷精品视频免| 亚洲精品国产精品国自| 亚洲精品日日夜夜| 国产农村妇女精品一区二区| 久久福利免费视频| 亚洲欧美视频一区二区| 日韩精品人成在线播放| 国产精品久久久久久久久久久久久久不卡 | 欧美高清xxxxx| 国产亚洲综合一区二区| 久久国产激情视频| 欧美精品免费视频| 国产日韩精品久久| 色偷偷一区二区三区| 午夜激情电影院| 色婷婷精品久久二区二区蜜臂av| 欧美一区二区三区爽大粗免费| 欧美一区二区三区久久| 一区二区三区国产精品| 午夜精品一二三区| 99国产精品永久免费视频| 亚洲国产视频一区二区三区| 精品国产乱码一区二区三区a| 欧美日韩国产在线一区| 一区二区三区国产欧美| 国产高潮国产高潮久久久91| 久久久999精品视频| 国产男女乱淫视频高清免费| 亚洲久色影视| 国产乱人伦偷精品视频免下载| 91精品国产高清一区二区三区 | 日韩精品少妇一区二区在线看| 久久99中文字幕| 91一区二区三区在线| 农村妇女毛片精品久久| 亚洲午夜国产一区99re久久| 色乱码一区二区三区网站| 日本高清二区| 亚洲精品日韩在线|