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: 日本一区中文字幕| 国产精品一区在线观看| 26uuu亚洲电影在线观看| 欧美色综合天天久久综合精品| 午夜一区二区三区在线观看| 欧美日本三级少妇三级久久| 午夜剧场一级片| 久久久久久久久久国产精品| 性刺激久久久久久久久九色| 国产另类一区| 一区二区在线精品| 日日夜夜精品免费看| 亚洲va国产| 精品国产乱码久久久久久图片| 99久久99精品| 狠狠色噜噜狠狠狠狠777| 亚洲精品日韩激情欧美| 色婷婷久久一区二区三区麻豆| 浪潮av网站| 久久国产精久久精产国| 国产理论一区| 日韩一级精品视频在线观看 | 欧美久久一区二区三区| 久久久精品久久日韩一区综合| 午夜影院啊啊啊| 中文字幕一区二区三区又粗| aaaaa国产欧美一区二区| 精品国产精品亚洲一本大道| 91麻豆精品国产91久久久更新资源速度超快 | 午夜电影一区二区三区| 亚洲欧美中日精品高清一区二区| 国产精品v欧美精品v日韩| 国产精品久久久久99| 国产精品一区亚洲二区日本三区 | 91精品视频免费在线观看| 99精品黄色| 久久久久久久亚洲视频| 免费看性生活片| 精品视频久| 夜色av网| 欧美一区久久久| 国产精品视频久久久久久| 国产精品乱码久久久久久久| 国产91丝袜在线| 亚洲午夜久久久久久久久电影院| 精品久久久影院| 中文字幕日本精品一区二区三区| 在线视频不卡一区| 电影午夜精品一区二区三区| 欧美午夜精品一区二区三区| 久久精品国产亚洲7777| 久久国产精品免费视频| av毛片精品| 91精品国产综合久久婷婷香| 国产农村乱色xxxx| 日韩av在线导航| 最新国产精品久久精品| 91片在线观看| 精品视频久| 中文字幕天天躁日日躁狠狠躁免费| 久久一二区| 狠狠色狠狠色综合婷婷tag| 欧美日韩精品影院| 国产精品v亚洲精品v日韩精品| 欧美一区二区三区性| 日本精品99| 韩国视频一区二区| 色综合久久综合| 久久精品亚洲精品国产欧美| 国产黄色网址大全| 91亚洲欧美日韩精品久久奇米色 | 久久精品视频一区二区| 99国产精品欧美久久久久的广告| 日本高清不卡二区| 曰韩av在线| 色噜噜狠狠色综合影视| 国产精品欧美一区二区视频| 国产91九色在线播放| 免费观看黄色毛片| 欧美老肥婆性猛交视频| 91精品一区| 91影视一区二区三区|