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: 亚洲精品国产久| 91精品丝袜国产高跟在线| 午夜少妇性影院免费观看| 久久久综合亚洲91久久98| 国产精品一区二区日韩新区| 国产精品视频二区不卡| 日韩欧美一区二区久久婷婷| 国产精品一区二区不卡| 亚洲国产精品一区二区久久,亚洲午夜| 中文字幕制服狠久久日韩二区| 91中文字幕一区| 国产精品一区一区三区| 久久精品国产色蜜蜜麻豆| 制服.丝袜.亚洲.另类.中文| 国产一区二区视频免费观看| 高清欧美xxxx| 日韩精品一区二区中文字幕| 性old老妇做受| 欧美69精品久久久久久不卡| 国产精品一区二区三| 精品99免费视频| 国产69精品久久久久999小说| 国产精品国产三级国产专区53| 欧美视屏一区| 狠狠色噜噜狠狠狠四色米奇| 国产精品欧美一区二区三区| 国语对白一区二区三区| 精品国产乱码久久久久久老虎| 国产99小视频| 欧美日韩一区二区高清| 狠狠色噜狠狠狠狠| 国产在线视频二区| 国产亚洲精品久久网站| 久久99精| 91精品国产九九九久久久亚洲| 精品无人国产偷自产在线| 亚洲国产精品91| 国产91白嫩清纯初高中在线| 免费xxxx18美国| 日韩午夜毛片| 激情久久精品| 97人人揉人人捏人人添| 亚洲乱玛2021| 欧美性猛交xxxxxⅹxx88| 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 | 精品一区电影国产| 亚洲欧洲日韩av| 欧美视屏一区二区| 97人人澡人人添人人爽超碰| 少妇**毛片| 精品亚洲午夜久久久久91| 午夜免费一级片| 中文字幕一区二区三区免费| 国产品久久久久久噜噜噜狼狼| 日本道欧美一区二区aaaa| 性old老妇做受| 国产欧美日韩另类| 午夜亚洲影院| 国产精品国产三级国产播12软件| 久久午夜鲁丝片午夜精品| 97久久精品人人澡人人爽| 国产美女视频一区二区三区| 国产一区二区免费在线| 国产69精品久久久久男男系列| 国产精品精品视频一区二区三区| 日韩精品免费一区二区中文字幕 | 在线观看国产91| 日韩中文字幕亚洲精品欧美| 亚洲欧美日韩视频一区| bbbbb女女女女女bbbbb国产 | 国产精品18久久久久久白浆动漫| 狠狠色噜噜狠狠狠狠综合久| 久久综合国产伦精品免费| 538国产精品| 91夜夜夜| 一区二区在线不卡| 国产精品久久久久久亚洲美女高潮| 91在线一区二区| 午夜av影视| 亚洲美女在线一区| 中文字幕日韩有码| 综合色婷婷一区二区亚洲欧美国产|