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: 国内精品久久久久久久星辰影视| 欧美国产精品久久| 国产91九色在线播放| 97香蕉久久国产超碰青草软件| 国内精品久久久久久久星辰影视| 国产精品二区一区二区aⅴ| 亚洲精品少妇一区二区| 亚洲制服丝袜在线| 日本xxxxxxxxx68护士| 国产乱淫精品一区二区三区毛片| 国产偷久久一区精品69| 2023国产精品久久久精品双| 国产1区2区视频| sb少妇高潮二区久久久久| 日本中文字幕一区| 91人人爽人人爽人人精88v| 91精品国产91热久久久做人人| 日韩精品一区二区三区中文字幕| 一区二区三区毛片| 久久精品一二三四| 色狠狠色狠狠综合| 999久久久国产精品| 久久精视频| 午夜a电影| 欧美老肥婆性猛交视频| 久久久精品观看| 亚洲欧美日本一区二区三区 | 欧美精品一区二区久久久| 欧美日韩一级在线观看| 国产欧美日韩精品在线| 一区二区三区欧美精品| 国产精品欧美日韩在线| 93精品国产乱码久久久| 精品国产一区二| 欧美日韩国产欧美| 国产精品一区二区在线观看免费| 欧美精品在线视频观看| 国产精品视频十区| 国产二区免费| 久久人做人爽一区二区三区小说 | 中文字幕一区2区3区| 午夜av男人的天堂| 亚洲精品中文字幕乱码三区91| 国产www亚洲а∨天堂| 国产精品精品视频一区二区三区| 国产经典一区二区| 欧美日韩精品在线播放| 久久综合二区| 911久久香蕉国产线看观看| 欧美日韩激情一区二区| 国产一区二区三区伦理| 欧美色综合天天久久| 国产视频一区二区三区四区| 神马久久av| 99国产精品久久久久| 午夜影院啪啪| 国产精品白浆视频| 91夜夜夜| 久久免费视频一区| 粉嫩久久久久久久极品| 99日本精品| 欧美一区二区三区四区五区六区| 国产69精品久久久久孕妇不能看 | 亚洲一二三四区| 日韩精品一二区| 国产91高清| 久久精品国产一区二区三区| 日韩精品一区二区不卡| 久久九精品| 猛男大粗猛爽h男人味| 大bbw大bbw巨大bbb| 午夜在线看片| 亚洲精品www久久久久久广东| 91亚洲欧美日韩精品久久奇米色| 日日噜噜夜夜狠狠| 国产精品999久久久| 亚洲色欲色欲www| 欧美日韩一区二区三区精品| 国产偷窥片| 手机看片国产一区| 欧美一区二区三区不卡视频| 欧美一区二区三区久久久精品|