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: 亚洲国产欧洲综合997久久,| 国产真实乱偷精品视频免| 88国产精品视频一区二区三区| 99国产精品| 国产一区不卡视频| 在线国产精品一区| 国产一区中文字幕在线观看| 国产精品人人爽人人做av片| 亚洲乱强伦| 亚洲欧美一区二区精品久久久| 日本一区二区免费电影| 国产精品久久91| 国产精品美女www爽爽爽视频| 高清国产一区二区三区| 亚洲精品国产setv| 国产视频一区二区视频| 国产中文字幕91| 国产精品一区在线观看你懂的| 狠狠躁夜夜躁人人爽天天天天97| 国产精品国外精品| 中文字幕另类日韩欧美亚洲嫩草| 欧美高清一二三区| 国产性生交xxxxx免费| 国产欧美精品一区二区在线播放| 国产99小视频| 曰韩av在线| 国产一区2| 日韩精品一区二区av| 国产二区视频在线播放| 一区二区欧美在线| 四虎国产永久在线精品| 99精品国产一区二区三区麻豆| 国产日韩一二三区| 热re99久久精品国99热蜜月| 久久69视频| 男女午夜爽爽| 99国产精品久久久久老师| 国产一区二区三区精品在线| 国产日韩一二三区| 国产午夜精品一区二区三区视频| 国产二区不卡| 色一情一乱一乱一区免费网站| 在线观看国产91| 午夜av男人的天堂| 国产精品日韩电影| 色妞妞www精品视频| 69久久夜色精品国产69乱青草| 国产精品v欧美精品v日韩| 国产aⅴ精品久久久久久| 国产香蕉97碰碰久久人人| 日韩精品午夜视频| 久久精品视频3| 思思久久96热在精品国产| 国产伦精品一区二区三区免费观看| 少妇精品久久久久www蜜月| 欧美精品在线观看一区二区| 国产精品一区一区三区| 欧美激情精品一区| 欧美午夜一区二区三区精美视频| 国产999精品视频| 久久99精品国产| 国产真实一区二区三区| 欧美精品在线视频观看| 亚洲欧洲另类精品久久综合| 日韩av在线播放网址| 久久精品视频一区二区| 免费看片一区二区三区| av午夜影院| 亚洲国产精品网站| 欧美乱大交xxxxx| 96国产精品| 91麻豆精品国产91久久久无限制版| 中文乱码字幕永久永久电影 | 欧美日韩一卡二卡| 午夜伦理在线观看| 精品国产一区二区三区麻豆免费观看完整版 | 亚洲精品中文字幕乱码三区91| 国产欧美亚洲精品第一区软件| 欧美日韩一级在线观看| 日韩一区免费| 国产乱色国产精品播放视频| 91精品国产九九九久久久亚洲|