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: 狠狠色噜噜狠狠狠四色米奇| 国产91九色在线播放| 国产香蕉97碰碰久久人人| 99精品国产一区二区三区麻豆| 亚洲精品国产主播一区| 999久久久国产| 天堂av一区二区| 国产一区二区三区在线电影| 欧美日韩九区| 久久国产激情视频| 亚洲午夜国产一区99re久久| 日韩精品久久久久久久的张开腿让| 国产不卡网站| 国产69久久久欧美一级| 国产区精品| 欧美一区二区色| 国产69精品久久777的优势| 精品国产亚洲一区二区三区| 亚洲精品日本无v一区| 99久久精品一区| 日韩精品999| 国产高清在线一区| 国产精品久久久久久久龚玥菲| 综合久久色| 99精品区| 精品国产亚洲一区二区三区| 国产99小视频| 国产精品一区二区av日韩在线| 中文字幕制服狠久久日韩二区| 国产精品亚洲а∨天堂123bt| xxxxhd欧美| 欧美一区二区三区三州| 亚洲免费精品一区二区| 国产乱对白刺激视频在线观看| 日韩国产精品久久| 国产人澡人澡澡澡人碰视| 亚洲精品456| 国产日韩欧美另类| 日韩av中文字幕一区二区| 日韩精品在线一区二区三区| 国产精品女同一区二区免费站| 国产一级精品在线观看| 国产91久久久久久久免费 | 国产视频一区二区不卡| 国产精品一品二区三区四区五区| bbbbb女女女女女bbbbb国产| 亚州精品中文| 精品国产一区二| 国产无遮挡又黄又爽又色视频| 99久久国产综合精品麻豆| 午夜激情看片| 精品99在线视频| 99久国产| 91福利视频免费观看| 国产精品尤物麻豆一区二区三区| 亚洲精品乱码久久久久久蜜糖图片| 夜夜爱av| 97人人添人人爽一区二区三区| 少妇**毛片| 扒丝袜网www午夜一区二区三区| 久久99久久99精品蜜柚传媒| 8x8x国产一区二区三区精品推荐 | 亚洲欧美另类综合| 日韩亚洲欧美一区二区 | 国产亚洲精品久久777777 | 久久国产精品网站| 欧美一区二区三区久久综合| 亚洲欧美色一区二区三区| 四季av中文字幕一区| 99久久精品免费看国产免费粉嫩| 国产在线卡一卡二| 四虎精品寂寞少妇在线观看| 国产乱码一区二区三区| 亚洲四区在线| 欧美激情精品一区| 国产一区二区高潮| 国产精品丝袜综合区另类| 久久精品国产亚洲一区二区| 亚洲精品www久久久| 日韩av在线一区| 中文字幕一区二区三区乱码| 久久99精品国产|