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: 久久99精| 麻豆91在线| 久久免费精品国产| 日韩精品一区三区| 大桥未久黑人强制中出| 日韩欧美中文字幕一区| 中文字幕日韩有码| 日本福利一区二区| 国产88av| 国产资源一区二区三区| 久久精品99国产精品亚洲最刺激| 99国产午夜精品一区二区天美| 国产精品自产拍在线观看蜜| 亚洲精品少妇一区二区| 国产精品久久免费视频在线| 中文字幕日韩精品在线| 国产69精品久久久久男男系列| 久久天堂国产香蕉三区| 91免费国产视频| 国产精品一区二区在线观看| xxxxhd欧美| 国产精品一区二区在线看| 日韩欧美高清一区| 色婷婷综合久久久久中文| 伊人精品一区二区三区| 国产不卡一区在线| 99热久久这里只精品国产www| 国产精品视频久久| 国产日本欧美一区二区三区| 国产日产精品一区二区| 国产91视频一区| 亚洲国产精品日本| 日本精品视频一区二区三区| 久久国产精品欧美| 精品国产一区二区在线| 91精品中综合久久久婷婷| 国产69精品99久久久久久宅男| 亚洲一区二区三区加勒比| 国产91精品一区二区麻豆亚洲| 一区二区三区欧美精品| 日本一区中文字幕| 国产日产精品一区二区| 狠狠色噜噜狠狠狠狠米奇777| 国产精品一二二区| 国语对白一区二区| 日韩欧美高清一区| 激情欧美日韩| 国产精品对白刺激在线观看| 李采潭无删减版大尺度| 国产精品久久久久久久久久不蜜月| 欧美日韩亚洲三区| 精品999久久久| 福利片91| 国产91高清| 国产欧美三区| 国产乱老一区视频| 久久国产精品99国产精| 99精品少妇| 国产激情二区| 黑人巨大精品欧美黑寡妇| 少妇在线看www| 午夜影院5分钟| 99精品欧美一区二区三区美图| 欧美性xxxxx极品少妇| 一区二区不卡在线| 99久久婷婷国产亚洲终合精品| 中文字幕在线视频一区二区| 国产一级不卡毛片| 丰满少妇高潮惨叫久久久| 精品久久久久久亚洲综合网| 91超碰caoporm国产香蕉| 挺进警察美妇后菊| 理论片高清免费理伦片| 51区亚洲精品一区二区三区| 亚洲五码在线| 91麻豆精品国产91久久久更新资源速度超快| 91精品国产九九九久久久亚洲| 国产一区二区三区伦理| 狠狠躁狠狠躁视频专区| 男人的天堂一区二区| 国产国产精品久久久久| 少妇太爽了在线观看免费|