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: 国产精品九九九九九九九| 欧美精品中文字幕在线观看| 男女午夜爽爽| 右手影院av| 亚洲国产精品国自产拍av| 2023国产精品自产拍在线观看| 国产88久久久国产精品免费二区| 久久久午夜爽爽一区二区三区三州| 激情久久一区| 8x8x国产一区二区三区精品推荐| 狠狠躁狠狠躁视频专区| 99久久精品国产系列| 国产欧美视频一区二区| 国产一区二区91| 91av精品| www.午夜av| 欧美一区二区三区久久精品视| 香港三日本三级三级三级| 一区二区国产盗摄色噜噜| 精品久久久久一区二区| 中文字幕制服狠久久日韩二区 | 亚洲欧美一区二区三区1000 | 国产偷亚洲偷欧美偷精品| 日本一二三区视频| 狠狠色噜狠狠狠狠| 国产精品一卡二卡在线观看| 日韩av在线一区| 国产一级在线免费观看| 精品在线观看一区二区| 久久午夜鲁丝片午夜精品| 亚洲精品一区,精品二区| 久久中文一区| 久久婷婷国产麻豆91天堂徐州| 国产日韩欧美中文字幕| 精品91av| 欧美一区二区三区爽大粗免费| 久久久久国产精品www| xxxxx色| 狠狠色狠狠色综合久久第一次| 欧美日韩国产专区| 欧美一区二区久久久| 日韩av中文字幕第一页| 亚洲va国产| 欧美日韩精品在线一区| 狠狠插狠狠干| 精品国产品香蕉在线| 日本白嫩的18sex少妇hd| 躁躁躁日日躁网站| 国产一区日韩精品| 国产伦精品一区二区三区免费观看| 国产精品高潮呻| 国产精品伦一区二区三区在线观看| 日韩偷拍精品| 国产91精品一区二区麻豆亚洲| 午夜码电影| 国产无遮挡又黄又爽又色视频| 黄色国产一区二区| 清纯唯美经典一区二区| 国产乱人伦精品一区二区三区| 99精品国产99久久久久久97| 91精品久久久久久久久久| 亚洲精品国产精品国产| 99精品视频一区二区| 日韩精品人成在线播放| 狠狠躁夜夜av| 91丝袜国产在线播放| 波多野结衣巨乳女教师| 91国产在线看| 亚洲欧美日韩精品suv| 中文文精品字幕一区二区| 国产精品乱码久久久久久久| 国产日韩欧美综合在线| 欧美日韩中文字幕一区二区三区 | 久久两性视频| 国产精品一区二区6| xx性欧美hd| 91婷婷精品国产综合久久| 日韩欧美高清一区| 99国产精品一区二区| 久久一区欧美| 欧美乱妇高清无乱码一级特黄| 国产欧美一区二区三区在线|