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: 亚洲欧美日韩视频一区| 电影午夜精品一区二区三区| 国产区一区| 一区不卡av| 亚洲国产偷| 99视频一区| 狠狠色噜噜狠狠狠狠综合久| 国产精品久久久久久一区二区三区| 国产91麻豆视频| 精品日韩久久久| 国产精品一区二区久久乐夜夜嗨| 99久久久国产精品免费调教网站| 亚洲欧洲日韩在线| 久久中文一区| 国产精品久久久不卡| 日本丰满岳妇伦3在线观看| 亚洲神马久久| 性国产日韩欧美一区二区在线| 久久久中精品2020中文| 日本护士hd高潮护士| 亚洲欧美自拍一区| 亚洲区在线| 亚洲影院久久| 狠狠色噜噜狠狠狠狠69| 亚洲精品一区二区另类图片| 国产日韩欧美另类| 91精品久久久久久| 欧美精品一区二区久久| 欧美一区二区三区不卡视频| 国产福利精品一区| 国产精品一区二区久久乐夜夜嗨| 亚洲欧美一区二区三区1000 | 国产中文字幕一区二区三区| 国产精品亚洲第一区| 日本中文字幕一区| 国产精品美女久久久另类人妖| 欧美日韩国产色综合一二三四| 99久久精品一区| 欧美精品一区二区三区久久久竹菊| 国产精品一区在线观看| 日韩精品一区二区三区四区在线观看| 国产精品第157页| 99热久久这里只精品国产www| 午夜影院一级片| 久久伊人色综合| 午夜av男人的天堂| 日韩一区免费| 亲子乱子伦xxxx| 一区二区在线视频免费观看| 欧美日韩国产在线一区| 国产精品久久久久免费a∨大胸| 久久99久国产精品黄毛片入口 | 九色国产精品入口| 国产精品国产亚洲精品看不卡15| 国产一区免费在线观看| 国产乱码精品一区二区三区中文| 波多野结衣女教师30分钟| 亚洲福利视频一区| 国产亚洲精品久久久久秋霞| 日韩一区国产| 国产日韩一区二区在线| 欧美日韩激情一区二区| 国产高清不卡一区| 99久久久久久国产精品| 亚洲国产一区二区精品| 国产精品久久久av久久久| av午夜在线| 亚洲精品久久久中文| 国产一区二区精品在线| 日韩欧美多p乱免费视频| 国产精品高潮在线| 国产一二区在线| 99精品欧美一区二区三区美图| xoxoxo亚洲国产精品| 亚洲二区在线播放视频| 日韩精品一区二区亚洲| 91一区二区三区视频| 在线播放国产一区| 一级午夜电影| 国产特级淫片免费看| 国产经典一区二区三区| 黑人巨大精品欧美黑寡妇|