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: 日本免费电影一区二区| 亚洲麻豆一区| 久久97国产| 国产精品欧美久久久久一区二区| 欧美一区二区三区三州| 久久国产精品-国产精品| 午夜理伦影院| 国产精品一区二区免费| 亚洲免费永久精品国产| 久久国产欧美一区二区三区免费| 17c国产精品一区二区| 91制服诱惑| 91丝袜诱惑| 日韩国产精品一区二区 | 性欧美激情日韩精品七区| 亚洲国产精品日本| 欧美日韩三区| 91视频一区二区三区| 色综合欧美亚洲国产| 一区二区三区香蕉视频| 亚洲欧洲一二三区| 国产精华一区二区精华| 99欧美精品| 亚洲精品456在线播放| 国产偷久久一区精品69| 国产精欧美一区二区三区久久| 亚洲一卡二卡在线| 亚洲精品老司机| 欧美网站一区二区三区| 久久福利免费视频| 欧美日韩一区二区三区69堂| 91九色精品| 国产精品一区亚洲二区日本三区| 久久99精品国产麻豆宅宅| 少妇高潮大叫喷水| 夜夜嗨av一区二区三区中文字幕 | 毛片大全免费观看| 香蕉久久国产| 国产九九九精品视频| 免费超级乱淫视频播放| 国产黄一区二区毛片免下载 | 97久久国产亚洲精品超碰热| 日本二区在线播放| 欧美一区二区三区高清视频| 午夜裸体性播放免费观看| 国产日韩麻豆| 午夜影院啪啪| 国产日韩欧美91| 羞羞免费视频网站| 久久久综合亚洲91久久98| 日韩精品一区二区三区四区在线观看| 久久精品一区二区三区电影| 91高清一区| 国产区一区| 亚洲欧美一二三| 国产一区二区三区大片| 亚洲精品一品区二品区三品区| 欧美激情午夜| 国产999在线观看| 国产精品黑色丝袜的老师| 日韩一区二区精品| 国产黄色一区二区三区| 欧美日韩精品不卡一区二区三区 | 亚洲国产精品日韩av不卡在线| 欧美freesex极品少妇| 国产69精品久久99的直播节目| 狠狠色噜噜狠狠狠狠2021免费| 欧美精品免费视频| 中文乱幕日产无线码1区| 性生交大片免费看潘金莲| 日韩无遮挡免费视频| 三级午夜片| 中文乱幕日产无线码1区| 97精品国产aⅴ7777| 国产中文字幕一区二区三区| 国产精品一区二区在线看| 精品久久香蕉国产线看观看gif| 精品一区二区超碰久久久| 国产1区2| 国产精品欧美一区二区视频| 午夜一区二区视频| 欧美日韩国产一二|