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久久国语露脸精品国产高跟| 亚洲国产精品日本| 亚洲精品国产精品国自产网站按摩 | 99国产精品久久久久| 国产日韩欧美另类| 国产一区二区三区黄| 日韩一区免费在线观看| 亚洲四区在线观看| 国产白丝一区二区三区| 小萝莉av| 首页亚洲欧美制服丝腿| 高清国产一区二区三区| 亚洲国产精品国自产拍久久| 国产aⅴ精品久久久久久| 粉嫩久久久久久久极品| 国产精品一区久久人人爽| 狠狠色综合久久婷婷色天使| 久久久久偷看国产亚洲87| 久久99精品国产麻豆宅宅| 免费毛片**| 狠狠插狠狠插| 午夜电影一区二区| 精品一区二区在线视频| 91一区二区三区久久国产乱| 午夜wwww| 国产一区二区三区大片| 制服丝袜视频一区| 日韩精品免费一区二区三区| 日本二区在线播放| 亚洲国产精品精品| 四虎国产精品永久在线国在线| 久久精品国产96| 理论片高清免费理伦片| 久久久一二区| 国产一区二区手机在线观看| 91精品国产高清一区二区三区| 亚洲乱亚洲乱妇28p| 日韩一级精品视频在线观看 | 狠狠躁夜夜躁| 欧美国产一区二区在线| 99国产精品欧美久久久久的广告| 久久一区二区精品| 日本精品一区在线| 鲁一鲁一鲁一鲁一鲁一av| 91看片淫黄大片91| 久久久久国产精品一区二区三区| 91影视一区二区三区| 亚洲高清国产精品| 亚洲国产精品美女| 精品国产乱码久久久久久影片| 精品久久二区| 欧美精品免费一区二区| 亚洲一卡二卡在线| 日本一区二区在线观看视频| 国产日韩一二三区| 精品久久香蕉国产线看观看gif| 日本久久不卡| 国产精品久久久综合久尹人久久9| 欧美国产亚洲精品| 日韩精品免费一区二区中文字幕 | 欧美精品国产一区| 国产资源一区二区三区| 精品久久久久久中文字幕 | 91视频国产一区| 国产精品一区在线观看你懂的 | 欧美一区二区三区免费视频| 国产91视频一区| 国产一区二区影院| 久久精视频| 岛国黄色av| 91一区在线| av午夜影院| 国产精品美女久久久免费| 国产v亚洲v日韩v欧美v片| 国产精品伦一区二区三区在线观看| 亚洲v欧美v另类v综合v日韩v| 久久精品国产久精国产| 91超碰caoporm国产香蕉| 午夜av影视| 久久国产精品欧美| 国产一级片大全| 国产.高清,露脸,对白|