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: 亚洲精品久久久中文| 久久久精品中文| 欧美日韩国产在线一区| 日韩av在线电影网| 午夜影院一级片| 99精品国产99久久久久久97| 国产专区一区二区| 美女啪啪网站又黄又免费| 国产视频在线一区二区| 免费午夜片| 国产日韩欧美91| 高清国产一区二区| av午夜剧场| 欧美久久久一区二区三区| 片毛片免费看| 国产精品1区二区| 国产精品免费一视频区二区三区| 亚洲一级中文字幕| 国产精品久久久爽爽爽麻豆色哟哟| 久久久久亚洲最大xxxx| 人人要人人澡人人爽人人dvd| 国偷自产一区二区三区在线观看 | 精品久久久久久久免费看女人毛片| 午夜裸体性播放免费观看| 日韩毛片一区| 欧美日韩精品在线一区| 国产精品免费自拍| 国产区一二| 久久久综合亚洲91久久98| 日韩精品久久久久久久的张开腿让| 国产理论片午午午伦夜理片2021| 蜜臀久久99精品久久久| 免费观看xxxx9999片| 精品国产免费一区二区三区| 午夜看片网| 中文字幕一级二级三级| 欧美极品少妇| 国产精品18久久久久白浆| 色偷偷一区二区三区| 国产日韩一区二区在线| 久久久久国产亚洲| 欧美三级午夜理伦三级老人| 久久夜色精品久久噜噜亚| 国产一区二区三区色噜噜小说| 老太脱裤子让老头玩xxxxx| 亚洲乱视频| 欧美一区二区伦理片| 国产一级片一区| 狠狠色综合久久婷婷色天使| 欧美日韩综合一区二区| 91精品国产综合久久国产大片| 亚洲欧洲精品一区二区三区不卡| 91精品第一页| 国产精品视频久久久久久久| 午夜诱惑影院| 欧美在线播放一区| 国产91一区二区在线观看| 国产99久久久精品视频| 午夜激情在线播放| 97人人模人人爽人人喊小说| 狠狠色噜噜狠狠狠狠2021免费| 国产人伦精品一区二区三区 | 亚洲国产精品91| 欧美日韩精品影院| 国产欧美日韩中文字幕| 狠狠色综合欧美激情| 欧美激情视频一区二区三区免费| 91精品高清| 国产vsv精品一区二区62| 大桥未久黑人强制中出| 免费毛片**| 三上悠亚亚洲精品一区二区| 亚洲精品性| 91嫩草入口| 国产黄色一区二区三区| 久久久久国产亚洲| 国产又色又爽无遮挡免费动态图| 亚洲精品日韩在线| 免费看性生活片| 日韩av在线免费电影| 精品久久不卡| 少妇厨房与子伦在线观看|