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: 欧美日本一二三区| 中文字幕在线乱码不卡二区区| 久久99国产精品久久99| 日韩欧美中文字幕一区| 久久久久久亚洲精品| 久久激情影院| 99热久久精品免费精品| 91久久久爱一区二区三区| 久久综合狠狠狠色97| 欧美一区二区三区艳史| 国产清纯白嫩初高生在线播放性色 | 精品少妇的一区二区三区四区| 一区二区久久精品66国产精品| 国产一二区在线| av午夜在线观看| 欧美亚洲视频二区| 狠狠色丁香久久婷婷综合丁香| 国产精品久久久久久久久久软件| 国产精品久久久麻豆| 欧美一区二区精品久久| 国产精品一二二区| 一区二区三区欧美视频| 久久国产精品欧美| 午夜电影院理论片做爰| 中文乱码在线视频| 国模吧一区二区| 午夜色影院| bbbbb女女女女女bbbbb国产| 国产va亚洲va在线va| 韩国女主播一区二区| 久久国产精彩视频| av素人在线| 日韩欧美国产第一页| 欧美一区二区三区高清视频| 日本一区二区三区中文字幕| 国产精品视频免费看人鲁| 99热久久这里只精品国产www | 欧美乱妇高清无乱码| 日本一区二区免费电影| 国产中文字幕一区二区三区| 一级久久久| 国产欧美日韩精品一区二区三区| 农村妇女毛片精品久久| 亚洲区在线| 国产精品乱码久久久久久久久| 国产亚洲精品久久久久久网站| 国产91视频一区| 91麻豆精品国产91久久久久推荐资源 | 亚洲欧美国产精品久久| 四虎久久精品国产亚洲av| 夜夜爽av福利精品导航| 国产一区二区在线观| ass韩国白嫩pics| 日韩a一级欧美一级在线播放| 国产一区二区三区在线电影| 久久99精品久久久久婷婷暖91| 99国产精品九九视频免费看| 6080日韩午夜伦伦午夜伦| 日韩精品一二区| 精品在线观看一区二区| 国产69精品久久久久777糖心| 性xxxxfreexxxxx交| 久久国产欧美一区二区三区精品| 精品久久香蕉国产线看观看gif| 国产欧美一区二区在线观看| 久久激情影院| 日韩av免费网站| 欧美激情综合在线| 国产精品视频十区| 欧美日韩中文字幕一区| 精品999久久久| 精品一区二区三区自拍图片区| 精品久久久久久中文字幕大豆网| 色婷婷噜噜久久国产精品12p | 亚洲国产精品女主播| 美女被羞羞网站视频软件| 国产精品久久久不卡| 97久久精品人人做人人爽50路| 伊人欧美一区| 久久国产精品久久| 国产精品视频免费看人鲁| 国内精品在线免费|