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久久99精品蜜柚传媒| 久久国产精品视频一区| 激情aⅴ欧美一区二区三区| 91国产一区二区| 片毛片免费看| 波多野结衣女教师电影| 91麻豆精品国产91久久久资源速度| 一区二区欧美精品| 亚洲精品一品区二品区三品区| 欧美一区免费| 国产精品伦一区二区三区级视频频 | 99精品区| 午夜老司机电影| 免费观看xxxx9999片| 欧美一区二区激情三区| 国产精品视频二区不卡| 国产一区二区三区国产| 国产在线视频99| 免费午夜在线视频| 波多野结衣女教师30分钟| 狠狠躁夜夜躁xxxxaaaa| 国产精品国产三级国产专区55| 亚洲欧美日本一区二区三区| 色噜噜狠狠色综合中文字幕| 日韩精品一区二区免费| 国产乱子一区二区| 亚洲一区二区国产精品| 国产精品一二三区视频出来一| 日韩av在线播| 欧美精品六区| 999久久久国产| 亚洲**毛茸茸| 神马久久av| 午夜电影一区二区三区| 欧美日韩中文国产一区发布| 99国产精品欧美久久久久的广告| 欧美日韩久久一区二区| 日韩精品久久久久久久酒店| 黄毛片免费| 国产精品网站一区| 欧美乱妇高清无乱码一级特黄| 色噜噜狠狠色综合久| 国产一级在线免费观看| 久久中文一区二区| 国产欧美一区二区三区沐欲| 日韩午夜三级| 欧美日韩一区电影| 玖玖精品国产| 欧美日韩国产专区| 亚洲神马久久| 国产乱一区二区三区视频| 国产精品区一区二区三| 欧美高清性xxxxhdvideos| 国产免费一区二区三区四区 | 中文字幕一区二区三区四| 久久国产精品欧美| 5g影院天天爽入口入口| 国产99视频精品免视看芒果| 精品欧美一区二区精品久久小说| 国产91麻豆视频| 亚洲码在线| 日本美女视频一区二区| 欧美日韩一区二区三区四区五区六区| 国产精欧美一区二区三区久久| 久久天天躁夜夜躁狠狠躁2022| 亚洲国产视频一区二区三区| 国产欧美一二三区| 欧美一区二区三区片| 一区二区国产盗摄色噜噜| 欧美激情片一区二区| 国产日韩欧美一区二区在线观看| 国产婷婷色一区二区三区在线| 大伊人av| 国产91刺激对白在线播放| 午夜影院啪啪| 欧美精品免费看| 欧美日韩国产影院| 午夜毛片在线看| 国产全肉乱妇杂乱视频在线观看| 中文字幕欧美一区二区三区| 国产精品高潮呻吟88av| 午夜影院黄色片|