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: 91久久香蕉国产日韩欧美9色| 亚洲一级中文字幕| 日韩无遮挡免费视频| 日本激情视频一区二区三区| 在线精品视频一区| 午夜av资源| 亚洲欧美日韩另类精品一区二区三区| av国产精品毛片一区二区小说| 国产91精品一区二区麻豆亚洲| 国产剧情在线观看一区二区| 一区二区免费播放| 蜜臀久久99静品久久久久久| 国产精品日韩三级| 久久天天躁狠狠躁亚洲综合公司| 国产天堂第一区| 国产美女三级无套内谢| 国产欧美二区| 色噜噜狠狠色综合中文字幕| 亚洲国产日韩综合久久精品| 91看片app| 欧美在线观看视频一区二区| 九九精品久久| 亚洲乱小说| 国产91丝袜在线| 女女百合互慰av| 亚洲va欧美va国产综合先锋| 日韩中文字幕在线一区二区| 亚洲一区二区福利视频| 国产精品一品二区三区四区五区| 性色av色香蕉一区二区| 制服丝袜二区| 国产精品一区在线观看| 福利片91| 日本一二三四区视频 | 伊人欧美一区| 91av精品| 91av一区二区三区| 国产精品欧美久久久久一区二区| 日本二区在线观看| 日韩欧美国产第一页| 日本不卡精品| 久久99中文字幕| 免费看大黄毛片全集免费| 午夜生活理论片| 大bbw大bbw巨大bbb| 欧美精品一区久久| 一区二区精品久久| 中文字幕a一二三在线| 国产日韩一区二区三免费| 狠狠色狠狠色88综合日日91| 97久久精品一区二区三区观看| 欧美精品粉嫩高潮一区二区| 一区二区三区欧美精品| 午夜叫声理论片人人影院| 在线精品国产一区二区三区| 午夜影院色| 91超碰caoporm国产香蕉| 欧美日韩一区不卡| 国产伦高清一区二区三区| 国产性猛交| 免费观看又色又爽又刺激的视频 | 国产精品高清一区| 欧美高清xxxxx| 性生交大片免费看潘金莲| 日韩久久电影| 欧美一区免费| 久久国产中文字幕| 精品国产伦一区二区三区| 午夜看片网址| 久久九精品| 亚洲国产精品国自产拍久久| 国产精品入口麻豆九色| 中文字幕国内精品| 国产精品免费观看国产网曝瓜| 国产精品二区一区二区aⅴ| 日韩精品久久一区二区| 性色av香蕉一区二区| 狠狠插狠狠爱| 久久久精品欧美一区二区| 7799国产精品久久99| 婷婷午夜影院| 大桥未久黑人强制中出|