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: 日韩av在线导航| 亚洲网久久| 日韩国产精品一区二区| 欧洲激情一区二区| 97国产婷婷综合在线视频,| 日韩av在线播放观看| 国产一区二区三区在线电影| 国产精品视频1区| 国产精品v一区二区三区| 亚洲伊人久久影院| 国产欧美日韩另类| 亚洲精品国产一区二区三区| 国产精品自产拍在线观看蜜| 国产精品久久久视频| 日本少妇高潮xxxxⅹ| 国产有码aaaae毛片视频| 少妇高潮大叫喷水| 一级午夜影院| 精品久久二区| 国产精品一区二区三区在线看| 亚洲欧洲国产伦综合| 日本一区中文字幕| 福利片91| 欧美一区久久久| 中文字幕欧美日韩一区| 日本护士hd高潮护士| 丰满少妇在线播放bd日韩电影| 国内自拍偷拍一区| 国产精品视频一区二区二| 69精品久久| 久久久精品观看| 午夜伦情电午夜伦情电影| 国产午夜精品一区二区三区最新电影 | 久久精品国产亚洲7777| 国产精品第56页| 福利视频亚洲一区| 中文字幕在线视频一区二区| 午夜肉伦伦| 91超薄丝袜肉丝一区二区| 夜夜躁狠狠躁日日躁2024| 国产麻豆91视频| 狠狠色狠狠色综合久久一| 欧美乱妇在线视频播放| 午夜影院一级| 国产精品1区2区| 强制中出し~大桥未久10| 国产69精品久久777的优势| 欧美日韩亚洲三区| 国产一级片子| 国产欧美一区二区三区不卡高清| 国产91九色视频| 国产精品亚洲二区| 日韩欧美激情| 九一国产精品| 国产精品久久免费视频| 精品综合久久久久| 欧美一区二区精品久久911| 国产偷国产偷亚洲清高| 国产一区二区三区网站| 午夜影院黄色片| 国产午夜亚洲精品| 日本一码二码三码视频| 天干天干天啪啪夜爽爽99| 久免费看少妇高潮a级特黄按摩| 97精品久久久午夜一区二区三区| 久久亚洲精品国产日韩高潮| 韩漫无遮韩漫免费网址肉| 久久免费视频一区二区| 午夜看片网站| 国产精品自拍在线| 人人要人人澡人人爽人人dvd| 亚洲日本国产精品| 欧美精品久久一区| 精品久久久影院| 亚洲精品日韩激情欧美| 久久99亚洲精品久久99果| 国产欧美三区| 夜夜躁人人爽天天天天大学生 | 精品亚洲午夜久久久久91| 浪潮av色| 国产精品一级片在线观看| 午夜电影三级|