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: 伊人久久婷婷色综合98网| 久久精品二| 精品国产一二三四区| 国产经典一区二区| 国产日韩一区在线| 狠狠躁日日躁狂躁夜夜躁av| 日本一区二区三区在线视频| 亚洲精品日本久久一区二区三区| 亚洲精品一区中文字幕| 日本不卡精品| 91亚洲欧美强伦三区麻豆| 91一区二区三区视频| 午夜wwwww| 国产第一区二区| 欧美一区二区三区在线视频播放| 精品国产一区二区三区高潮视 | 国产91精品一区| 销魂美女一区二区| 性欧美一区二区| а√天堂8资源中文在线| 国产精品久久久久久久妇女| 欧美日韩一区二区三区不卡视频| 69久久夜色精品国产7777| 91狠狠操| 久久精品二| 亚洲欧美另类国产| 在线精品一区二区| 久久九九亚洲| 国产精品日本一区二区不卡视频| 欧美日本一二三区| 国产伦理久久精品久久久久| 国产性生交xxxxx免费| 日韩亚洲欧美一区二区| 国产精品禁18久久久久久| 欧美日韩九区| 狠狠躁夜夜av| 欧美精品中文字幕在线观看| 国产精品视频久久| 国产无遮挡又黄又爽免费网站| 欧美激情精品久久久久久免费 | 中文字幕日本一区二区| 精品国产乱码久久久久久图片| 国产一级在线免费观看| 亚洲精品456| 国产91精品高清一区二区三区| 国产亚洲精品精品国产亚洲综合 | 欧美乱妇高清无乱码免费| 国产高清精品一区二区| 久久免费福利视频| 四虎国产精品永久在线国在线| 国产精品国产三级国产播12软件 | 国产精品美女一区二区视频| 日韩三区三区一区区欧69国产| 免费毛片a| 麻豆精品久久久| 亚洲精品91久久久久久| 亚洲国产欧美国产综合一区| 97国产精品久久久| 日本精品一区二区三区在线观看视频 | 99riav3国产精品视频| 老女人伦理hd| 91黄色免费看| 热99re久久免费视精品频软件| 99国产精品欧美久久久久的广告| 久久综合伊人77777麻豆| 午夜情所理论片| 国产偷亚洲偷欧美偷精品| 国产91精品一区二区麻豆亚洲| 亚欧精品在线观看| 精品一区二区三区视频?| 日本一区免费视频| 欧美3级在线| 国产一区亚洲一区| 日本精品一区在线| 国产精品爽到爆呻吟高潮不挺| 国产一级自拍| 国产偷国产偷亚洲清高| 狠狠色成色综合网| 91麻豆精品国产91久久久无限制版| 久久精品国产一区二区三区不卡| 狠狠综合久久av一区二区老牛| 久久久久国产精品视频|