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: 亚洲欧美另类综合| 国产精品96久久久久久久| 少妇高潮大叫喷水| 综合欧美一区二区三区| 538国产精品一区二区在线| 国产麻豆精品久久| 在线观看欧美一区二区三区| 国产欧美日韩精品一区二区图片| 日韩在线一区视频| 欧美性xxxxx极品少妇| 99久久精品一区| 亚洲高清久久久| 日韩午夜毛片| 久久精品一区二区三区电影| 欧美午夜羞羞羞免费视频app| 国产精品二十区| 粉嫩久久99精品久久久久久夜| 欧美激情精品久久久久久免费| 亚洲欧美一区二区三区1000| 午夜伦全在线观看| 欧美在线观看视频一区二区| 国产极品一区二区三区| 丰满岳乱妇在线观看中字 | 久久久久国产精品www| 欧美三区二区一区| 曰韩av在线| 亚洲女人av久久天堂| 少妇又紧又色又爽又刺激的视频| 99精品欧美一区二区三区美图| 亚洲国产日韩综合久久精品| 亚洲欧洲日韩在线| 激情久久一区| 日韩精品久久一区二区三区| 亚洲欧美一区二区三区1000| 精品国产一区在线| 日本丰满岳妇伦3在线观看| 亚洲国产日韩综合久久精品| 国产精品久久久久久久新郎| 国产精品一区二区麻豆| 国产精品视频十区| 一区二区在线视频免费观看| 国产精品综合在线观看| 亚洲精品乱码久久久久久写真| 国产高清一区二区在线观看| 夜夜躁狠狠躁日日躁2024| 国产午夜精品一区二区三区在线观看| 99精品久久久久久久婷婷| 狠狠色综合久久丁香婷婷| 欧美一区二区免费视频| 精品久久国产视频| 激情久久一区二区| 国产精品18久久久久白浆| 亚洲精品国产91| 夜夜爱av| 国产经典一区二区| 夜夜精品视频一区二区| 一区二区三区香蕉视频| 日韩中文字幕一区二区在线视频 | 99国产精品久久久久99打野战| 午夜天堂在线| 99热久久精品免费精品| 日本高清二区| 亚洲精欧美一区二区精品| 欧美一区二区三区在线视频播放| 欧美一区亚洲一区| 日韩午夜毛片| 日韩欧美国产另类| 91亚洲精品国偷拍自产| 日韩美一区二区三区| 九九久久国产精品| 欧美精品亚洲一区| 强行挺进女警紧窄湿润| 日韩国产精品一区二区| 99精品国产一区二区三区不卡 | 午夜剧场伦理| 精品无人国产偷自产在线| 国产欧美视频一区二区| 国产日韩欧美91| 精品福利一区二区| 久久午夜鲁丝片| 午夜av免费观看| 99国产超薄丝袜足j在线观看|