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: 国产日本欧美一区二区三区| 欧洲激情一区二区| 国产一区二区三区四| 欧美乱大交xxxxx古装| 国产一区二区四区| 在线国产精品一区| 一区二区中文字幕在线| **毛片在线免费观看| 国产91麻豆视频| 国产一区不卡视频| 国产一区二区在| 国产精品v欧美精品v日韩| 色婷婷精品久久二区二区蜜臂av| 日本一区二区高清| 久久影视一区二区| 国产精品九九九九九| 日韩精品999| 美女脱免费看直播| 午夜国产一区二区三区四区| 日韩av片无码一区二区不卡电影| 狠狠插狠狠干| 国产一区日韩一区| 激情欧美一区二区三区| 高清欧美xxxx| 日韩一区二区中文字幕| 亚洲乱码av一区二区三区中文在线: | 欧美日韩久久精品| 日韩一级视频在线| 亚洲欧洲精品一区二区三区不卡| 中文字幕一区二区三区乱码 | 国产婷婷一区二区三区久久| 久久精品色欧美aⅴ一区二区| 窝窝午夜理伦免费影院| 免费午夜在线视频| 日韩精品久久一区二区三区| 色一情一乱一乱一区免费网站| 亚洲制服丝袜中文字幕| xxxxhdvideosex| 黄毛片免费| a级片一区| 亚洲一级中文字幕| 免费观看xxxx9999片| 日韩午夜毛片| 国产丝袜一区二区三区免费视频| xxxx18hd护士hd护士| 性国产videofree极品| 国产精品18久久久久久白浆动漫| 久久99视频免费| 91黄色免费看| 久久夜靖品2区| 一区二区精品久久| 国产精品高潮呻吟88av| 99久久精品一区字幕狠狠婷婷 | 久久激情影院| 久久一区二区三区欧美| 中文字幕一区三区| 国产一区在线免费观看| 国产另类一区| 国产亚洲精品久久777777| 国产视频精品一区二区三区| 欧美午夜看片在线观看字幕| 91社区国产高清| 国产精品美女久久久免费| 91社区国产高清| 中文字幕二区在线观看| 肥大bbwbbwbbw高潮| 日韩精品乱码久久久久久| 亚洲1区在线观看| 日韩av在线影视| 91精品福利在线| 日韩一级片在线免费观看| 偷拍自中文字av在线| 国产精品三级久久久久久电影| 精品国产免费一区二区三区| 久久五月精品| 久久久精品欧美一区二区免费| 国产亚洲精品久久久久久网站 | 综合久久色| 精品免费久久久久久久苍| 人人澡超碰碰97碰碰碰| 欧美日韩一级在线观看| 欧美日韩三区|