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: 国产精品一区二区免费| freexxxxxxx| 日本xxxxxxxxx68护士| 秋霞av电影网| 91精品国产九九九久久久亚洲| 欧美日韩激情一区| 狠狠色狠狠色综合系列| 久久久久久久久亚洲精品| 四虎国产精品永久在线国在线| 国产欧美日韩va另类在线播放| 国产一区免费在线| 亚洲欧美日韩国产综合精品二区| 素人av在线| 国产日韩欧美精品一区二区| 亚洲精品国产主播一区| 国产精品刺激对白麻豆99| 亚洲欧美日韩综合在线| 国产区91| 亚洲欧美一卡| 亚洲欧美国产精品一区二区| 99久久国产综合精品色伊| 国模一区二区三区白浆| 激情欧美一区二区三区| 欧美午夜看片在线观看字幕| 狠狠色综合久久婷婷色天使 | 欧美国产精品久久| 日日狠狠久久8888偷色| 亚洲少妇中文字幕| 5g影院天天爽入口入口| 精品一区中文字幕| 激情久久精品| 亚洲欧洲一二三区| 7777久久久国产精品| 精品国产亚洲一区二区三区| 欧美日韩国产专区| 精品国产区| 夜夜躁狠狠躁日日躁2024| 狠狠插影院| 欧美色综合天天久久| 国产91丝袜在线| 91精品国产九九九久久久亚洲| 99精品视频一区二区| 丰满岳妇伦4在线观看| 一区二区三区四区国产| 国产精品午夜一区二区三区视频| 久久夜色精品亚洲噜噜国产mv| free×性护士vidos欧美| 午夜诱惑影院| 午夜在线观看av| 免费看农村bbwbbw高潮| 国产精品人人爽人人做av片| 性视频一区二区三区| 精品99免费视频| 麻豆9在线观看免费高清1| 国产欧美一区二区在线| 亚洲乱亚洲乱妇50p| 四虎影视亚洲精品国产原创优播| 91中文字幕一区| 91精品婷婷国产综合久久竹菊 | 国产69久久久欧美一级| 91人人爽人人爽人人精88v| 国产91久久久久久久免费| 亚洲精品国产setv| 性少妇freesexvideos高清bbw| 国产精品久久久爽爽爽麻豆色哟哟| 亚洲欧美色一区二区三区| 91波多野结衣| 99国产超薄丝袜足j在线观看| 躁躁躁日日躁网站| 夜夜精品视频一区二区| 17c国产精品一区二区| 欧美三级午夜理伦三级中视频| 91嫩草入口| 日韩精品一区二区免费| 日韩欧美一区精品| 国产亚洲精品久久久久秋霞| 日韩精品午夜视频| 欧美一级免费在线视频| 欧美一区二区三区免费电影| 野花社区不卡一卡二| 日韩精品一区二区三区免费观看视频| 国产精品白浆视频|