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: 国产精品欧美一区二区视频| 狠狠插狠狠爱| 神马久久av| 99久久精品国产系列| 国产精品久久久久久久久久久久久久久久| 欧美高清性xxxxhdvideos| 少妇在线看www| 国产清纯白嫩初高生在线播放性色| 亚洲美女在线一区| 国产理论一区| 日本神影院一区二区三区| 91热国产| 日韩中文字幕一区二区在线视频| 欧美在线免费观看一区| 91精品国产高清一区二区三区 | 91久久免费| 91看黄网站| 久久亚洲精品国产日韩高潮| 精品一区二区三区影院| 久久激情网站| 精品在线观看一区二区| 日韩精品一区二区久久| 欧美精品日韩| 亚欧精品在线观看| 欧美日韩国产综合另类| 久久国产精品久久| 色婷婷综合久久久中文一区二区| 视频一区欧美| 国产农村妇女精品一二区| 国产91在线拍偷自揄拍| 亚洲欧美中日精品高清一区二区| 久久一区二区三区欧美| 国产午夜亚洲精品羞羞网站 | 91av精品| 91精品综合在线观看| 狠狠色噜噜狠狠狠合久| 香蕉免费一区二区三区在线观看| 久久综合狠狠狠色97| 国产精品黑色丝袜的老师| 精品免费久久久久久久苍| 激情aⅴ欧美一区二区三区| 亚洲四区在线| 欧洲国产一区| 真实的国产乱xxxx在线91| 国产一区日韩欧美| 亚洲精品一区在线| 91国偷自产一区二区介绍| 91精品夜夜| 少妇高清精品毛片在线视频 | 久久国产激情视频| 一区二区欧美在线| 一区二区三区毛片| 精品久久久久99| 精品国产一区二区三区四区vr| 国产一二区视频| 天干天干天干夜夜爽av| 精品国产一区二区三区高潮视 | 国产精品视频一区二区二| 日日夜夜亚洲精品| 久久99精品国产麻豆婷婷| 99久久夜色精品| 91丝袜国产在线观看| 久久国产中文字幕| 国产二区视频在线播放| 久久精品综合视频| 91超薄丝袜肉丝一区二区| 久久国产精品-国产精品| 国产精品九九九九九九九| 国产高清在线精品一区二区三区| 久久精品国产一区二区三区不卡| 欧美精品日韩一区| 国产男女乱淫真高清视频免费| 国产精品亚洲精品| 毛片免费看看| 日韩一级免费视频| 国产亚洲精品久久19p| 国产88在线观看入口| 在线国产91| 午夜伦理在线观看| 免费精品99久久国产综合精品应用| 少妇bbwbbwbbw高潮| 免费a级毛片18以上观看精品 |