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: 亚洲欧美国产精品一区二区| 狠狠躁狠狠躁视频专区| 午夜爽爽爽男女免费观看| 色婷婷噜噜久久国产精品12p| 亚洲欧美日韩另类精品一区二区三区| 四季av中文字幕一区| 亚洲网久久| 91精品久| 韩国视频一区二区| 日本一区中文字幕| 96国产精品视频| 国产精品一区二区在线观看| 在线观看v国产乱人精品一区二区 国产日韩欧美精品一区二区 | 激情欧美一区二区三区| 欧美一区免费| 欧美日韩精品不卡一区二区三区| 国产精品久久久久久久岛一牛影视| 99riav3国产精品视频| 97精品久久人人爽人人爽| 中文av一区| 午夜av电影院| 色噜噜狠狠色综合中文字幕| 亚洲视频h| 精品一区在线观看视频| 国产婷婷色一区二区三区在线| 国产精品一区二区在线观看| 欧美在线一区二区视频| 日本一区午夜艳熟免费| 99色精品视频| 欧美一区二区精品久久| 欧美一区二区三区久久| 99久久国产综合精品麻豆| 久久久久亚洲| 亚洲精品日日夜夜| 国产一区激情| 狠狠躁夜夜躁2020| 欧美一级特黄乱妇高清视频| 午夜老司机电影| 99精品偷拍视频一区二区三区| 久久精品入口九色| 激情欧美一区二区三区| 91麻豆精品一区二区三区| 国产99久久久久久免费看| 欧美69精品久久久久久不卡| 色综合久久精品| 国产一区在线视频观看| 亚洲精品日本无v一区| 少妇在线看www| 女女百合互慰av| 亚洲精品欧美精品日韩精品| 国产一区二区在线免费| 国产免费观看一区| 99热久久这里只精品国产www| 欧美视频1区| 97人人模人人爽视频一区二区 | 欧美一区二区性放荡片| 国产淫片免费看| 日本一二三四区视频| 亚洲欧洲另类精品久久综合| 午夜黄色一级电影| 93精品国产乱码久久久| 久久99精品久久久噜噜最新章节| 在线播放国产一区| 国产伦精品一区二区三区无广告| 亚洲第一区国产精品| 国产不卡网站| 久久国产欧美一区二区三区免费| 一本大道久久a久久精品| 91精品久久久久久久久久| 久久三级精品| 色婷婷噜噜久久国产精品12p| 欧美亚洲精品一区二区三区| 996久久国产精品线观看| 国产91视频一区二区| 亚洲精品一区二区三区98年| 日韩精品一区二区三区不卡| 日韩av在线免费电影| 国产精品乱码久久久久久久久| 999久久久国产| 97精品久久人人爽人人爽| 午夜激情电影院| 午夜爽爽爽男女免费观看 |