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: 久久99国产视频| 午夜欧美a级理论片915影院| 大桥未久黑人强制中出| 欧美性xxxxx极品少妇| 国产精品久久久久久久新郎| 男女午夜影院| 岛国黄色网址| 久久夜色精品国产亚洲| 欧美人妖一区二区三区| 一区二区三区国产视频| 午夜精品99| 中文字幕日韩一区二区| ass韩国白嫩pics| 久久九精品| 欧美一区视频观看| 国产亚洲另类久久久精品| 午夜剧场一区| 成年人性生活免费看| 制服丝袜二区| 国产性猛交xx乱视频| 日韩精品中文字幕在线| 精品一区二区三区中文字幕| 欧美色综合天天久久| 国产精品久久久久久久久久久久久久久久久久 | 亚洲精品一品区二品区三品区| 国产日韩欧美网站| 91人人爽人人爽人人精88v| 欧美日韩国产精品一区二区亚洲| xxxx国产一二三区xxxx| 亚洲精品久久久久中文字幕欢迎你 | 91精品久| 国产的欧美一区二区三区| 国产一区影院| 欧美视屏一区| 欧美性猛交xxxxxⅹxx88| 97精品国产97久久久久久免费| 性色av色香蕉一区二区三区| 538国产精品| 国产一区亚洲一区| 99国产精品| 国产在线欧美在线| 午夜影院你懂的| 欧美一级久久久| 88国产精品视频一区二区三区| 久久久久久久国产| 波多野结衣巨乳女教师| 亚洲精品人| 午夜大片男女免费观看爽爽爽尤物| 国产亚洲精品久久久456| 一本色道久久综合亚洲精品图片| 国产一区二区三区精品在线| 91免费看国产| 日韩亚洲欧美一区| 国产精品日韩视频| 精品国精品国产自在久不卡| 色妞妞www精品视频| 国产精品99久久久久久宅男| 久久国产精彩视频| 国产欧美亚洲一区二区| 免费视频拗女稀缺一区二区| 国产免费观看一区| 国产精品女同一区二区免费站| 国产色一区二区| 99精品久久99久久久久| 国产欧美日韩中文字幕| 性精品18videosex欧美| 精品特级毛片| 色一情一乱一乱一区99av白浆| 欧美日韩国产一区二区三区在线观看| 男女视频一区二区三区| 国产欧美日韩二区| 欧美精品第一区| 狠狠色噜噜狠狠狠狠2021天天| 国产在线一区二区视频| 三级视频一区| 99精品免费在线视频| 中文字幕欧美一区二区三区 | 91精品婷婷国产综合久久竹菊| 男女午夜影院| 国产精品国产三级国产播12软件| 国产精品1区2区| 中文字幕一区二区三区又粗|