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: 国产女人与拘做受免费视频| 欧美日韩综合一区| 国产精品videossex国产高清| 国产一区二区视频免费在线观看| 国产玖玖爱精品视频| 亚洲精品一区,精品二区| 欧美精品日韩精品| 中文字幕制服丝袜一区二区三区| 国产女人好紧好爽| 国产精品19乱码一区二区三区| 久久网站精品| 国产一级一区二区| 李采潭无删减版大尺度| 欧美日韩一区不卡| 欧美日韩国产三区| 久久午夜鲁丝片| 麻豆9在线观看免费高清1| 久久免费视频一区二区| 少妇性色午夜淫片aaa播放5| 国产麻豆91欧美一区二区| 国产一二区精品| 狠狠色狠狠色88综合日日91| 素人av在线| 久久精品国产亚洲7777| 国产丝袜在线精品丝袜91| 国产欧美一区二区精品性色超碰| 国产一区中文字幕在线观看| 91国偷自产中文字幕婷婷| 91理论片午午伦夜理片久久| 蜜臀久久99精品久久久| 国产精品无码专区在线观看| 国产一区二区电影在线观看| 狠狠操很很干| 日韩欧美高清一区二区| 午夜裸体性播放免费观看| 国产精品久久久久久久妇女| 欧美日韩国产123| 国产精品美女久久久免费| 99re久久精品国产| 99国产精品久久久久老师| 国产精品高潮呻吟三区四区| 91avpro| 久久99中文字幕| 中文字幕天天躁日日躁狠狠躁免费| 国产午夜精品一区二区三区欧美| 精品国产一区二区三区四区四 | 久久一区二区精品视频| 久久精品com| 99久久婷婷国产综合精品草原| 国产精品黑色丝袜的老师| 欧美精品综合视频| 精品国产一区二区三区在线| 国产精品日本一区二区不卡视频| 一区二区三区免费高清视频| 日韩中文字幕亚洲精品欧美| 久久精品入口九色| 91精品黄色| 国产第一区二区三区| 国产一区二区电影| 波多野结衣女教师30分钟| 天摸夜夜添久久精品亚洲人成| ass韩国白嫩pics| 国产又黄又硬又湿又黄| 国产一区二区三区伦理| 激情欧美一区二区三区| 91久久国产露脸精品国产护士| 国内少妇偷人精品视频免费| 欧美一区二区三区激情| 国产精品不卡在线| 又色又爽又大免费区欧美| 精品91av| 曰韩av在线| 国产一区二区二| 国产精品久久亚洲7777| 精品国产一区二区三区在线| 久久福利免费视频| 91视频一区二区三区| 亚洲精品久久久久中文字幕欢迎你| 日韩精品一区二区三区四区在线观看| 国产一区二区视频免费观看| 亚洲国产一区二| 国产一区二区四区|