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: 久久九九亚洲| 欧美日韩国产色综合视频| 久久精品麻豆| 亚洲国产日韩综合久久精品| 国产精品电影一区| 狠狠色丁香久久婷婷综| 粉嫩久久久久久久极品| 国产在线精品区| 国产在线不卡一| 欧美在线免费观看一区| 91精品福利观看| 精品国产免费久久| 电影91久久久| 国产日产高清欧美一区二区三区| 欧美一区二区三区四区在线观看| 蜜臀久久99精品久久久| 亚洲国产欧洲综合997久久, | 欧美精品国产一区二区| 日本高清二区| 91精品久久久久久综合五月天| 免费在线观看国产精品| 精品少妇的一区二区三区四区| 国产精品日韩视频| 国产精品视频久久| 欧美hdxxxx| 国产精品视频免费看人鲁| 欧美精品在线一区二区| 青苹果av| 爱看av在线入口| 精品国产乱码久久久久久老虎| 国产www亚洲а∨天堂| 国产午夜精品一区二区三区欧美| 狠狠色噜噜狠狠狠狠综合久| 日本精品一区二区三区在线观看视频| 日本一区二区高清| 国产精品伦一区二区三区级视频频| 中文字幕日本一区二区| 91久久精品在线| 99精品国产免费久久| 97久久国产亚洲精品超碰热| 99久久精品免费看国产免费粉嫩| 日韩国产精品一区二区| 国产精品电影一区二区三区| 久99久精品| 996久久国产精品线观看| 亚洲国产欧美一区| 国产一区二区三区伦理| 国产精品99久久久久久宅男| 九色国产精品入口| 国产精品一级片在线观看| 国产白嫩美女在线观看| 黄色国产一区二区| 日韩一区免费在线观看| 99久久国产综合精品色伊 | 国产中文字幕91| 久久久久国产精品免费免费搜索| 国产一区午夜| 91视频国产一区| 躁躁躁日日躁网站| 97久久国产精品| 国产91九色视频| 高清欧美精品xxxxx| 少妇又紧又色又爽又刺激的视频 | 日本边做饭边被躁bd在线看| 日本一二三区视频在线| 日韩精品一区二区三区不卡| 亚洲神马久久| 国产91综合一区在线观看| 国产午夜亚洲精品羞羞网站| 国产二区精品视频| 国产日产欧美一区二区| 女人被爽到高潮呻吟免费看| 少妇久久免费视频| 日韩精品一区二区不卡| 国产色婷婷精品综合在线播放| 国产精品一卡二卡在线观看| 精品国产乱码久久久久久久久| 色午夜影院| 欧美一区二区色| 午夜电影毛片| 国产在线一区不卡| 欧美一区二区三区三州|