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: 国产韩国精品一区二区三区| 91片在线观看| 国产免费一区二区三区网站免费| 久久伊人色综合| 国产在线拍揄自揄拍| 日韩精品久久一区二区三区| 国产在线干| 欧美精品日韩精品| 久久狠狠高潮亚洲精品| 久久99精品国产麻豆婷婷洗澡 | 丝袜诱惑一区二区三区| 日韩午夜电影院| 欧美极品少妇| 久久精品亚洲精品| 国产精品乱码久久久久久久久| 91超薄丝袜肉丝一区二区| 日本不卡精品| 久久福利视频网| 国产午夜伦理片| 国产一区精品在线观看| 91婷婷精品国产综合久久| 午夜影院你懂的| 国产精品久久久久久亚洲调教| 海量av在线| 久久99精品久久久噜噜最新章节| 国产亚洲精品久久久久久久久动漫| 97精品超碰一区二区三区| 欧美精品中文字幕在线观看| 国产一区二区黄| 国产一级不卡毛片| 午夜黄色大片| 狠狠色噜噜狠狠狠狠2021免费| 久99久视频| 欧美精品中文字幕在线观看| 欧美一区二区三区四区夜夜大片 | 欧美日韩一二三四区| 国产91久| 国产精品免费自拍| 久久99国产视频| 久久国产激情视频| 亚洲欧美国产中文字幕| 88888888国产一区二区| 激情久久久久久| 午夜爽爽视频| 久久aⅴ国产欧美74aaa| 91国产一区二区| 97久久精品人人澡人人爽| 日韩国产精品久久| 91精品www| 国产精品亚州| 大伊人av| 少妇特黄v一区二区三区图片| 综合欧美一区二区三区| 亚洲久色影视| 日本三级香港三级| 亚洲国产精品入口| 91精品视频一区二区三区| 欧美久久久一区二区三区| 国产精品日韩一区二区| 欧美日韩一区免费| 91麻豆精品国产自产欧美一级在线观看 | 国产精品一区二区在线看| 一区二区中文字幕在线| 日本边做饭边被躁bd在线看| 中文字幕在线视频一区二区| 51区亚洲精品一区二区三区| 欧美精品第一区| 青苹果av| 欧美高清性xxxxhdvideos| 欧美午夜羞羞羞免费视频app| av午夜在线| 性夜影院在线观看| 国产日韩欧美在线影视| 欧美性受xxxx狂喷水| 精品国产一区二区三区国产馆杂枝| 91麻豆精品国产91久久久久| 国产欧美亚洲一区二区| 色噜噜狠狠色综合久| 在线精品国产一区二区三区| 天干天干天啪啪夜爽爽99| 午夜诱惑影院| 99精品黄色|