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: 国产精品日韩高清伦字幕搜索| 久久国产欧美一区二区免费| 午夜精品影视| 欧美精品九九| 2023国产精品久久久精品双| 国产资源一区二区| 香港三日本8a三级少妇三级99 | 国产全肉乱妇杂乱视频在线观看 | 亚洲欧美一卡| 国产日韩欧美三级| 国产精品欧美久久久久一区二区| 国产日韩欧美中文字幕| 欧美老肥婆性猛交视频| 久久精品国产久精国产| 麻豆精品久久久| 国产精品一区在线观看你懂的| 九一国产精品| 欧美日韩精品在线一区| 国产一区二区资源| 日韩精品中文字幕在线播放| 婷婷嫩草国产精品一区二区三区| 狠狠操很很干| 午夜激情在线播放| 狠狠躁日日躁狂躁夜夜躁| 中文字幕理伦片免费看| 精品国产区一区二| 久久精品国产精品亚洲红杏| 少妇又紧又色又爽又刺激视频网站| 亚洲欧美日韩综合在线| 久久亚洲精品国产一区最新章节| 日本白嫩的18sex少妇hd| 青苹果av| 国产精品日韩精品欧美精品| 欧美精品在线不卡| 欧美一区二区三区免费视频| 日韩偷拍精品| 亚洲国产一区二| 久久激情综合网| 国产精品久久国产精品99| 中文字幕在线乱码不卡二区区| 欧美日本一二三区| 国产日韩欧美亚洲| 国产精品高潮呻吟三区四区 | 亚洲国产欧美一区| 日韩久久电影| 欧美午夜一区二区三区精美视频| 91狠狠操| 国产乱码精品一区二区三区介绍| 国产目拍亚洲精品区一区| 一区二区三区欧美精品| 国产日韩欧美亚洲综合| 国产精品久久人人做人人爽| 国产极品一区二区三区| 超碰97国产精品人人cao| 久久人人爽爽| 亚洲精品久久久久不卡激情文学| 国产91精品一区| **毛片免费| 欧美午夜理伦三级在线观看偷窥| 国产精品刺激对白麻豆99| 日本一区二区三区中文字幕| 激情久久一区二区| 国产欧美一区二区三区沐欲| 国产精品美乳在线观看| 狠狠色噜噜狠狠狠色综合| 亚洲欧洲精品一区二区三区不卡| 欧美日韩国产专区| 国产日韩欧美自拍| 午夜特片网| 强制中出し~大桥未久10在线播放| 国产99久久久久久免费看| 国产69精品久久久久按摩| 91视频一区二区三区| 色噜噜狠狠一区二区| 午夜精品在线播放| 国产床戏无遮挡免费观看网站 | 中文字幕制服丝袜一区二区三区| 99国产精品9| 国产大学生呻吟对白精彩在线| 欧美精品国产精品| 国产一区二区三区大片| 99久久99精品|