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: 国产乱一乱二乱三| 99国产午夜精品一区二区天美| 国产精品日韩电影| 精品国产免费一区二区三区| 一区二区欧美精品| 欧美在线观看视频一区二区三区| 黄色av免费| 久久综合国产精品| 国产一区二区在线观| 国产二区不卡| 国产免费第一区| 欧美高清性xxxxhdvideos| 精品国产一区二区三区忘忧草| 久久黄色精品视频| **毛片免费| 91国偷自产中文字幕婷婷| 综合欧美一区二区三区| 国产一级片子| 国产精品亚洲第一区| 夜色av网站| 中文字幕a一二三在线| 一区二区国产精品| 欧洲激情一区二区| 国产乱色国产精品播放视频| 中文字幕一区二区三区免费| 精品国产一二三四区| 国产欧美一区二区三区免费看 | 国产偷亚洲偷欧美偷精品| 狠狠色狠狠色综合系列| 5g影院天天爽入口入口| 久久精品一二三四| 欧美日韩国产精品一区二区| 久久国产欧美一区二区免费| 自偷自拍亚洲| 国产999精品视频| 亚洲乱视频| 日韩中文字幕在线一区二区| 国产品久久久久久噜噜噜狼狼| 国语对白一区二区| 日韩精品久久久久久久的张开腿让 | 一区二区三区国产欧美| 日本一区二区电影在线观看| 中文字幕亚洲欧美日韩在线不卡| 国产乱码精品一区二区三区介绍| 精品国产区| 亚洲国产精品综合| 国产亚洲精品久久yy50| 欧美一级久久精品| 激情久久综合| 午夜伦理在线观看| 欧洲在线一区| 亚洲精品国产主播一区| 91精品啪在线观看国产线免费| 久久99精品久久久久国产越南| 国内精品99| 狠狠色狠狠色88综合日日91 | 国产一区二区精品在线| 国产精品免费观看国产网曝瓜| 国产精品一区二区中文字幕| 一色桃子av大全在线播放| 免费看欧美中韩毛片影院| 国产欧美一区二区三区在线| 一区二区三区欧美日韩| 秋霞av电影网| 视频一区二区三区欧美| 国产一区二区视频免费观看| 乱子伦农村| 精品国产91久久久久久久 | 精品国产1区2区3区| 日韩av电影手机在线观看| 久久精品麻豆| 久久久久亚洲| 鲁一鲁一鲁一鲁一鲁一av| 一区二区三区中文字幕| 色一情一乱一乱一区免费网站| 国产精品欧美日韩在线| 久久青草欧美一区二区三区| 色狠狠色狠狠综合| 国产91清纯白嫩初高中在线观看| 国产精品日韩在线观看| 91精品www| 欧美一区二区三区另类|