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: 色综合久久久| **毛片在线免费观看| 日韩av一区不卡| 午夜爽爽视频| 久久精品麻豆| 午夜剧场a级免费| 欧美日韩精品影院| 久久精品国产色蜜蜜麻豆| 精品一区二区三区中文字幕| 国产一区二区三区精品在线| 护士xxxx18一19| 国产精品入口麻豆九色| 中文字幕日韩精品在线| 国产精品国产一区二区三区四区 | 国产麻豆一区二区| 国产精品一区二区不卡| 日韩精品中文字| 国产一区在线精品| 91一区在线| 免费欧美一级视频| 黄色av免费| 狠狠色噜噜狠狠狠狠2018| 欧美一区二区三区免费在线观看| 久久福利视频网| 中文字幕a一二三在线| 99国产精品久久久久老师| 国产午夜精品一区二区三区最新电影| 亚洲一级中文字幕| 亚洲精品一品区二品区三品区 | 狠狠色丁香久久婷婷综| 国产精品二区一区二区aⅴ| 亚洲免费精品一区二区| 久久国产免费视频| 91理论片午午伦夜理片久久 | 国产精品久久久久久久新郎| 国产午夜精品一区二区三区欧美| 欧美日韩国产一级| 亚洲国产精品国自产拍av| 国产精品久久久久久av免费看| 中文文精品字幕一区二区| 四虎久久精品国产亚洲av| 亚洲欧美v国产一区二区| 香港三日本三级三级三级| 国产玖玖爱精品视频| 亚洲制服丝袜在线| 强制中出し~大桥未久10| 午夜免费av电影| 欧美乱妇高清无乱码| 26uuu亚洲国产精品| 少妇厨房与子伦在线观看| 欧美一区二区三区四区夜夜大片| 国产精品美女久久久免费| 久久人做人爽一区二区三区小说 | 伊人av综合网| 亚洲高清国产精品| 香港三日本8a三级少妇三级99| 亚洲福利视频一区| 日本护士hd高潮护士| 国产精品入口麻豆九色| 午夜免费网址| 日韩av在线影视| 欧美日韩一级二级三级| 亚洲乱视频| 欧美精品日韩一区| 国产电影精品一区二区三区| 少妇高潮在线观看| 亚洲精品国产主播一区| 一区二区三区四区视频在线 | 日本二区在线观看| 国产精品亚洲а∨天堂123bt| 视频一区二区中文字幕| 国产清纯白嫩初高生在线观看性色| 伊人欧美一区| 国产精品99999999| 正在播放国产一区二区| 久久久久久久久亚洲精品| 国产精品视频二区不卡| 欧美日韩一区视频| 日韩av在线网| 色噜噜狠狠狠狠色综合久| 日日夜夜精品免费看| 97欧美精品|