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: 国产欧美三区| 91精品国产高清一区二区三区| 国产午夜精品一区二区理论影院 | 欧美一区二区三区日本| 日韩美一区二区三区| 久久精品综合| 国产专区一区二区| 欧美日韩中文字幕一区二区三区| 国产精品综合一区二区三区| 国产天堂一区二区三区| 日韩精品免费播放| 97人人模人人爽人人喊小说| 97涩国一产精品久久久久久久| 久久精品视频3| 国产91九色视频| 国产人澡人澡澡澡人碰视| 日本午夜一区二区| 国产在线视频二区| 日韩精品一区二区av| 国产欧美视频一区二区| 午夜诱惑影院| 99爱精品在线| 精品国产乱码久久久久久图片| 欧美高清性xxxxhd| 91精品一区二区中文字幕| 99精品欧美一区二区| 欧美日韩中文字幕一区| 欧美极品少妇videossex| 久久精品中文字幕一区| 国产精品视频十区| 国产女人和拘做受在线视频| 91免费视频国产| 精品一区中文字幕| 一区二区三区欧美日韩| 日韩亚洲精品视频| 久久久精品免费看| 狠狠躁天天躁又黄又爽| 欧美一区免费| 一区二区在线精品| 国产日韩欧美综合在线| 欧美在线观看视频一区二区 | 午夜欧美a级理论片915影院| 久久国产视屏| 国产精品久久久久四虎| 狠狠色狠狠色综合系列| 国产视频一区二区视频| 蜜臀久久99精品久久久| 国产69精品福利视频| 国产一区二区三区国产| 性生交大片免费看潘金莲| 久久婷婷国产麻豆91天堂徐州| 爽妇色啪网| 夜夜爽av福利精品导航| 国产偷窥片| 91av中文字幕| 国产欧美日韩综合精品一| 亚洲国产aⅴ精品一区二区16| 一区二区91| 肥大bbwbbwbbw高潮| 亚洲欧洲一二三区| 97欧美精品| 国产精品一级在线| 国产精品网站一区| 久久夜色精品久久噜噜亚| 国产原创一区二区| 日本精品一区二区三区在线观看视频| 国产大学生呻吟对白精彩在线| 夜夜嗨av色一区二区不卡| 91精品资源| 四虎影视亚洲精品国产原创优播| 国产精品久久久久久一区二区三区| 久久久久久中文字幕| 色噜噜狠狠狠狠色综合久 | 97视频一区| 亚洲乱亚洲乱妇50p| 国产一区二区在线观| 国产伦理精品一区二区三区观看体验 | 综合久久国产九一剧情麻豆| 少妇高潮一区二区三区99小说| 欧美一区二区三区另类| 久久96国产精品久久99软件| 欧美日韩三区二区|