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: 欧美片一区二区| 中文字幕视频一区二区| 亚洲国产精品一区在线观看| 欧美3级在线| 国产第一区二区三区| 国产精品久久免费视频| 激情欧美一区二区三区| 日本高清二区| av午夜剧场| 午夜叫声理论片人人影院| 精品亚洲午夜久久久久91| 欧美性xxxxx极品少妇| 精品一区在线观看视频| 国产美女视频一区二区三区| 国产色99| 国产精品欧美久久| 视频一区二区三区中文字幕| 日本一二三不卡| 久久久久久亚洲精品| 久久99精品久久久久婷婷暖91| 亚洲精品卡一卡二| 精品久久久久久中文字幕| 国产精品一二三区视频出来一| 久久精品视频3| 欧美在线视频一二三区| 午夜看片网| 久久久久国产精品视频| 国产91在线拍偷自揄拍| 国内久久久久久| 国产视频一区二区三区四区| 夜夜躁人人爽天天天天大学生| 亚洲视频精品一区| 夜夜爽av福利精品导航| 色综合久久88| 国产三级欧美三级日产三级99| 色吊丝av中文字幕| 美国一级片免费观看| 中文字幕在线播放一区| 欧美日韩激情一区| 日韩精品一区二区三区四区在线观看| 国产一区二区黄| 欧美视屏一区| 99国产精品久久久久99打野战| 日韩精品中文字幕久久臀| 午夜电影理伦片2023在线观看| 一区二区三区四区视频在线| 99国产精品免费观看视频re| 欧美亚洲视频二区| 91国偷自产一区二区介绍| 精品国产免费久久| 欧美精品第一区| 97人人模人人爽视频一区二区| 99久久夜色精品国产网站| 狠狠色噜噜狠狠狠狠视频| 免费的午夜毛片| 亚洲欧美视频一区二区| 国产日韩欧美91| 国产日韩精品久久| 国产乱xxxxx97国语对白| 国产精品久久久久久一区二区三区 | 久久久精品欧美一区二区| 国产97在线播放| 久久久一二区| 日本丰满岳妇伦3在线观看| 国产高清一区在线观看| 久久福利免费视频| 国产精品视频二区不卡| 国产精品69久久久| 午夜激情免费电影| 久久久久国产精品免费免费搜索 | 国产69精品久久99不卡解锁版| 真实的国产乱xxxx在线91| 狠狠色噜噜狠狠狠狠米奇7777| 少妇中文字幕乱码亚洲影视| 日本一二三区视频在线| 国产欧美日韩二区| 自偷自拍亚洲| 国产精品日韩电影| 国产99久久九九精品免费| 理论片午午伦夜理片在线播放 | 99国产精品99久久久久久粉嫩| 91精品久久天干天天天按摩|