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xxxxxxxxx68护士| 国产精品日韩一区二区| 国产目拍亚洲精品区一区| 日韩美一区二区三区| 一区二区三区免费高清视频| 日韩精品免费一区二区在线观看| 满春阁精品av在线导航| 国产麻豆一区二区三区在线观看| 91中文字幕一区| 久久久一二区| 午夜激情电影院| 欧美激情午夜| 性色av色香蕉一区二区| 右手影院av| 国产88av| 亚洲va久久久噜噜噜久久0| 在线观看国产91| 996久久国产精品线观看| 欧美一级久久精品| 日韩精品中文字幕一区二区三区| 国产精品5区| 99er热精品视频国产| 一区二区精品在线| 99国产精品欧美久久久久的广告| 久久99精品久久久大学生| 国产精品视频免费一区二区| 国产一区二区激情| 精品国产一区二区三| 精品99在线视频| 日韩精品中文字| 日本一区中文字幕| 国产一二区在线观看| 野花社区不卡一卡二| 7799国产精品久久99| 国产免费一区二区三区四区五区| 性色av色香蕉一区二区三区| 欧美日韩国产综合另类| 久久91久久久久麻豆精品| 久久一区二| 亚洲欧洲精品一区二区三区不卡| 亚洲二区在线播放视频| 97久久国产精品| 国产乱码精品一区二区三区介绍| 亚洲高清乱码午夜电影网| 午夜伦理片在线观看| 日本少妇一区二区三区| 亚洲精品日本无v一区| 国产乱淫精品一区二区三区毛片| 91精品一区二区在线观看| 色吊丝av中文字幕| 欧美中文字幕一区二区| 国语对白一区二区三区| 欧美69精品久久久久久不卡| 久久国产精品久久| 中文字幕日韩一区二区| 欧美乱妇在线视频播放| 国产乱了高清露脸对白| 国产精品一区久久人人爽| 在线观看欧美一区二区三区| 日韩一级免费视频| 国产婷婷色一区二区三区在线| 国产精品爽到爆呻吟高潮不挺| 久久激情影院| xxxx18日本护士高清hd| 国产97免费视频| 精品婷婷伊人一区三区三| 久久免费视频99| 国产伦精品一区二区三区免费下载| 亚洲精品www久久久| 国产三级在线视频一区二区三区| 高清国产一区二区三区| 欧美精品国产精品| 国产二区不卡| 国产一区三区四区| 日韩精品福利片午夜免费观看| 日韩亚洲精品视频| 国产一区二区三区色噜噜小说| 久久激情综合网| 中文字幕另类日韩欧美亚洲嫩草| 午夜激情电影院| 国产农村妇女精品一区二区 | 欧美三级午夜理伦三级中视频|