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: 国产欧美一区二区三区在线看| 国产二区三区视频| 国产精品日韩在线观看| 99国产精品久久久久| 国产精品美女www爽爽爽视频| 午夜生活理论片| 波多野结衣女教师30分钟| 91av中文字幕| 亚洲欧美国产一区二区三区| 欧美性二区| 在线国产精品一区| 午夜黄色网址| 狠狠色噜噜狠狠狠狠2021免费| 日本二区在线播放| xxxxhd欧美| 精品久久香蕉国产线看观看gif| 亚洲麻豆一区| 国产精品一区二区日韩新区 | 国产91电影在线观看| 国产一区二区免费电影| 亚洲乱小说| av不卡一区二区三区| 精品国精品国产自在久不卡| 久久国产欧美一区二区免费| 欧美中文字幕一区二区三区| 国产jizz18女人高潮| 国产精品麻豆一区二区| 国产真实乱偷精品视频免| 亚洲精品少妇一区二区| 国产一区午夜| 欧美一区二区三区爽大粗免费| 大bbw大bbw巨大bbw看看| 国产一区2| 精品久久久久久久免费看女人毛片| 思思久久96热在精品国产| 免费**毛片| 欧美一区二区三区性| 91精品www| 国产一区二区资源| 91亚洲欧美强伦三区麻豆| 午夜亚洲国产理论片一二三四| 91国产一区二区| 狠狠色综合久久婷婷色天使| 欧美在线免费观看一区| 视频一区二区国产| 综合久久一区| 午夜肉伦伦| 国产午夜一级片| 国产精品久久久久久久久久嫩草| 色一情一乱一乱一区99av白浆| 91精品婷婷国产综合久久竹菊 | 69精品久久| 国产二区不卡| 午夜精品99| 亚洲乱亚洲乱妇28p| 国产一区二三| 国产真裸无庶纶乱视频| 久久99久久99精品免观看软件| 91精品久久久久久| 岛国黄色av| 窝窝午夜精品一区二区| 国产一区二区黄| 精品久久久久一区二区| 午夜爽爽爽男女免费观看| 国产一区日韩在线| 久久精品麻豆| 一区二区午夜| 久久精品一| 国产99久久九九精品| 国产乱老一区视频| 国产精品免费不卡| 精品少妇一区二区三区 | 国产精品久久久久久久岛一牛影视| 国产一区二区视频在线| 99久久国产综合| 国产伦精品一区二区三区电影 | 欧美一区二区三区久久精品| 日本护士hd高潮护士| 久久国产欧美日韩精品| 午夜免费av电影| 久久99精品一区二区三区| 猛男大粗猛爽h男人味|