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: 欧美一区二区三区激情视频| 久久国产欧美一区二区免费| 91国偷自产中文字幕婷婷| 国产丝袜在线精品丝袜91| 亚洲精品无吗| 国产一区免费在线| 久久99精品久久久野外直播内容 | 少妇在线看www| 97精品国产aⅴ7777| 日韩电影在线一区二区三区| 欧美亚洲国产日韩| 色狠狠色狠狠综合| 久久中文一区| 丰满少妇高潮惨叫久久久一| 麻豆天堂网| 偷拍精品一区二区三区| 色综合久久综合| 国产香蕉97碰碰久久人人| 欧美一区二区色| aaaaa国产欧美一区二区| 97久久国产亚洲精品超碰热| 一区二区三区国产精华| 国v精品久久久网| 亚洲乱码av一区二区三区中文在线:| 精品久久久久一区二区| 色综合久久网| 国产91综合一区在线观看| 亚洲精品欧美精品日韩精品| 欧美一区二区在线不卡| 一二三区欧美| 波多野结衣巨乳女教师| 国产白丝一区二区三区| 日本一区欧美| 亚洲国产欧美一区| 午夜看片网站| 亚洲精品国产精品国自| 亚洲国产精品国自产拍av| 97人人揉人人捏人人添| 高清国产一区二区三区| 视频一区二区三区欧美| 欧美中文字幕一区二区| 国产精品欧美日韩在线| 国产91在| 日韩一区二区中文字幕| 精品国产鲁一鲁一区二区三区| 综合国产一区| 蜜臀久久99精品久久一区二区| 国产99视频精品免视看芒果| 国产真实一区二区三区| 国产女人与拘做受免费视频| 91日韩一区二区三区| 精品少妇的一区二区三区四区| 久久精品国产久精国产| 国产欧美一区二区三区四区| 鲁丝一区二区三区免费| 小萝莉av| 亚洲乱玛2021| 国产激情视频一区二区| 久久久精品99久久精品36亚| 国产欧美一区二区三区免费视频| 日本一级中文字幕久久久久久| 午夜电影天堂| 精品一区二区超碰久久久| 91精品色| 久久97国产| 色婷婷精品久久二区二区我来| 国产午夜精品一区二区三区视频| 精品国产一区二| 欧美一区二区三区三州| 国产区一二| 日韩av在线影视| 欧美二区精品| 欧美一区二区久久| 国产福利一区在线观看| 中文文精品字幕一区二区| 亚洲精品乱码久久久久久蜜糖图片| 扒丝袜pisiwa久久久久| 亚洲少妇一区二区| 日韩欧美国产另类| 欧美一区二区三区四区五区六区 | 国产玖玖爱精品视频| 窝窝午夜理伦免费影院|