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: 一区二区久久久久| 久久九九国产精品| 久久综合狠狠狠色97| 国产视频一区二区视频| 2018亚洲巨乳在线观看| 精品国产一区二区在线| 欧美精品xxxxx| 国产精品久久久综合久尹人久久9| 国产日韩一区二区三免费| 国产精品伦一区二区三区在线观看| 香蕉av一区二区三区| 精品一区二区三区视频?| 国产欧美日韩另类| 国产午夜三级一区二区三| 日韩av在线影视| 国产的欧美一区二区三区 | 91精品系列| 国产日韩欧美自拍| 日韩久久精品一区二区| 国产999在线观看| 国产乱对白刺激视频在线观看| 国产一区影院| 亚洲视频h| 日韩久久精品一区二区| 美女直播一区二区三区| 国产精品区一区二区三| 国产精品9区| 亚洲乱强伦| 又黄又爽又刺激久久久久亚洲精品 | 淫片免费看| 日本高清h色视频在线观看| 一区二区在线精品| 国产69精品福利视频| 亚洲欧美日韩另类精品一区二区三区 | 香蕉视频一区二区三区| 久久国产精品麻豆| 一区二区三区日韩精品| 少妇厨房与子伦在线观看| 久久99国产精品视频| 国产一区二区黄| 亚洲国产偷| 99久久免费毛片基地| 高清欧美xxxx| 2023国产精品久久久精品双| 日韩午夜毛片| 热99re久久免费视精品频软件| 国产精品久久人人做人人爽| 99视频一区| 精品国产精品亚洲一本大道| 中文字幕av一区二区三区四区| 国产精品二区一区二区aⅴ| 国产99久久久精品视频| 国产精品乱码久久久久久久久| 国产一区在线视频观看| 夜色av网| 久久国产欧美日韩精品| 国产剧情在线观看一区二区| 国产盗摄91精品一区二区三区| 欧美乱大交xxxxx| 久久国产欧美视频| 日韩精品一区二区三区四区在线观看| 四虎精品寂寞少妇在线观看| 日日夜夜精品免费看| 午夜性电影| 久久午夜精品福利一区二区| 欧美极品少妇xxxxⅹ| 精品999久久久| 一区二区三区四区国产| 97人人模人人爽人人喊小说| 99久久国产综合精品麻豆| 亚洲乱码av一区二区三区中文在线:| 日韩欧美一区二区久久婷婷| 国产天堂一区二区三区| 97人人模人人爽人人喊38tv| 久久精品手机视频| 久久国产精品-国产精品| xxxx国产一二三区xxxx| 国产一区二区在线观| 国内视频一区二区三区| 国产精品日本一区二区不卡视频| 国产69精品久久| 日韩中文字幕区一区有砖一区|