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: 亚洲精品一区中文字幕| 国产欧美性| 国内自拍偷拍一区| 国产精品一品二区三区四区五区| 88888888国产一区二区| 91视频一区二区三区| 亚洲午夜国产一区99re久久| 国产二区三区视频| 国产麻豆一区二区三区在线观看 | 国产无套精品一区二区| 亚洲欧美日韩视频一区| 99久久国产综合| 亚洲日本国产精品| 国产精品理人伦一区二区三区 | 午夜天堂电影| 国产精品二区一区| 夜夜爱av| 日韩av中文字幕在线免费观看| 亚洲区日韩| 97精品久久人人爽人人爽| 国产精品久久亚洲7777| 久久99精品国产麻豆婷婷洗澡 | 国产精品欧美一区二区三区奶水 | 91丝袜诱惑| 国产一区二三| 亚洲va国产| 国产欧美一区二区三区在线看| 亚洲va欧美va国产综合先锋| 亚洲国产精品入口| 欧美一区二区三区四区夜夜大片 | 亚洲精品日本无v一区| 日韩精品在线一区二区三区| 国产女人和拘做受在线视频| 国产精品天堂| 天摸夜夜添久久精品亚洲人成| 蜜臀久久99精品久久久久久网站| 亚洲精品乱码久久久久久蜜糖图片| 九一国产精品| 欧洲在线一区| 亚洲高清久久久| 理论片午午伦夜理片在线播放| 欧美日韩一区二区三区不卡| 国产精品人人爽人人做av片| 99久精品视频| 色乱码一区二区三区网站| www.成| 国产精品一区二区免费视频| 欧美日韩一区电影| 色噜噜狠狠色综合影视| 国产一区二区电影在线观看| 欧美xxxxhdvideos| 国产呻吟久久久久久久92| 国产一区二区中文字幕| 亚洲精品日韩激情欧美| 精品国产一区二区三区高潮视| 曰韩av在线| 国产欧美一区二区精品性| 中文字幕一区二区三区又粗| 国产精品亚洲精品一区二区三区| 精品国产1区2区3区| 国产区精品| 欧美日韩亚洲国产一区| 又黄又爽又刺激久久久久亚洲精品 | 久久99中文字幕| 99久久精品免费看国产交换| 国产一区二区三区黄| 一区二区三区国产精华| 九色国产精品入口| 欧美日韩激情一区| 欧美精选一区二区三区| 国产精品综合在线观看| 日日夜夜精品免费看| 在线国产一区二区| 久久伊人色综合| 日日噜噜夜夜狠狠| 国产精品久久人人做人人爽| 久久天天躁夜夜躁狠狠躁2022| 婷婷午夜影院| 日韩亚洲欧美一区二区 | 精品国产18久久久久久依依影院| 国产三级一区二区| 国产精品一区二区在线看|