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: 日韩精品免费看| 午夜理伦影院| 国产真实乱偷精品视频免| 午夜毛片在线观看| 国产男女乱淫视频高清免费| 福利片91| 精品国产1区2区3区| 精品国产一区二区三区国产馆杂枝| 91热精品| 99久久久久久国产精品| 夜夜爽av福利精品导航| 91精品福利在线| 日韩毛片一区| 亚洲国产精品一区在线| 在线精品国产一区二区三区| 日韩精品一区三区| 日韩欧美中文字幕精品| 亚洲精品国产一区二区三区| 国产精品一区一区三区| 国产网站一区二区| 国产一区二区91| 一区精品二区国产| 色噜噜日韩精品欧美一区二区 | 日韩三区三区一区区欧69国产| 91精品资源| 国产精品乱综合在线| 91国内精品白嫩初高生| 亚洲午夜精品一区二区三区电影院| 日本免费电影一区二区三区| 国内少妇偷人精品视频免费| 中文字幕一区二区三区日韩精品| 亚洲国产精品一区二区久久,亚洲午夜| 亚洲精品乱码久久久久久高潮| 久久久综合香蕉尹人综合网| 国产精品综合在线| 国产vsv精品一区二区62| 51区亚洲精品一区二区三区| 午夜激情免费电影| 97精品久久人人爽人人爽| 国产欧美视频一区二区| 久久99久久99精品蜜柚传媒| 精品欧美一区二区在线观看| 国产精品一区亚洲二区日本三区| 午夜影院一区| 在线国产精品一区| 岛国精品一区二区| 国产999在线观看| 夜夜爱av| 午夜片在线| 国产日韩欧美亚洲| 丰满少妇高潮惨叫久久久| 欧美日韩国产三区| 国产精品久久久久久久久久久久久久久久久久 | 欧美日韩三区| 午夜一区二区三区在线观看| 国产69精品久久久久999小说| 一本一道久久a久久精品综合蜜臀 国产三级在线视频一区二区三区 日韩欧美中文字幕一区 | 一区二区久久精品| 91超薄丝袜肉丝一区二区| 最新国产精品自拍| 亚洲欧美制服丝腿| 一区二区三区欧美日韩| 国产伦精品一区二区三区照片91| 国产精品一级片在线观看| 色乱码一区二区三区网站| 欧美hdxxxx| 91日韩一区二区三区| 午夜av资源| 久久精品国产亚| 国产精品一区不卡| 亚洲精品久久久久中文字幕欢迎你| 午夜av资源| 亚洲三区二区一区| 国产精品自产拍在线观看桃花| 色噜噜狠狠色综合影视| 国产aⅴ精品久久久久久| 国产aⅴ一区二区| 国产精品一区在线播放| 免费久久99精品国产婷婷六月| 在线观看国产91| 91日韩一区二区三区| 久久噜噜少妇网站|