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: 日韩av在线高清| 国产区91| 久久久久国产亚洲| 亚洲乱视频| 亚洲精品91久久久久久| 日韩av免费电影| 中文字幕一区二区三区乱码| 亚洲国产精品一区二区久久,亚洲午夜| 少妇厨房与子伦在线观看| 91精品国模一区二区三区| 最新国产精品久久精品| 国产91在线播放| 国产麻豆精品久久| 国产午夜精品一区二区三区欧美| 国产精品乱码久久久久久久| 久久婷婷国产综合一区二区| 88888888国产一区二区| 国产乱老一区视频| 91丝袜国产在线播放| 国产69精品久久99的直播节目| 精品国产一区二区三| 国产精品一区二区三区在线看| av素人在线| 久久久中精品2020中文| 国产精品九九九九九九九| 亚洲精品久久久久999中文字幕| 国产乱人激情h在线观看| 少妇太爽了在线观看免费| 久久国产精品久久久久久电车| 狠狠躁夜夜躁xxxxaaaa| 国产高潮国产高潮久久久91| 午夜无遮挡| 精品少妇一区二区三区 | 精品无码久久久久国产| 国产无遮挡又黄又爽免费网站| 国产精品第56页| 欧美精品亚洲一区| 亚洲精品乱码久久久久久按摩| 97人人澡人人爽91综合色| 国产精品一区二| 国产一区二区三区中文字幕| 久久精品欧美一区二区| 午夜影院5分钟| 综合色婷婷一区二区亚洲欧美国产| 精品国产乱码一区二区三区在线| 性视频一区二区三区| 久久天天躁夜夜躁狠狠躁2022| 少妇太爽了在线观看免费| 午夜av电影院| 色综合久久综合| 日本白嫩的18sex少妇hd| 日韩偷拍精品| 91香蕉一区二区三区在线观看| 久久三级精品| 国模一区二区三区白浆| 亚州精品国产| 国产日产欧美一区| 国产精品美女一区二区视频| 久99久精品| 欧美一区二区三区久久| 国产丝袜一区二区三区免费视频 | 精品久久久久久久久亚洲| 国产午夜一级一片免费播放| 国产精一区二区三区| 四虎久久精品国产亚洲av| 国产91清纯白嫩初高中在线观看| 亚洲va国产2019| 国语对白老女人一级hd| 国产欧美一区二区三区免费| 久久精品国产亚洲一区二区| 国产精品欧美久久久久一区二区| 91精品国产九九九久久久亚洲 | 国产欧美日韩一区二区三区四区 | 日韩欧美高清一区二区| 久久一级精品视频| 国产亚洲欧美日韩电影网| 一区二区在线不卡| 亚洲精品日本无v一区| 国产一级自拍| 亚洲精品久久久久www| 一区二区国产盗摄色噜噜| 国产一区二区三区影院|