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: 黄色香港三级三级三级| 亚洲欧洲日本在线观看| 亚洲精品91久久久久久| 日韩精品久久久久久久酒店| 91福利试看| 亚洲va国产2019| 欧美老肥婆性猛交视频| 男女午夜影院| 欧美一区二区三区久久久久久桃花| 国产超碰人人模人人爽人人添| 久久国产精品二区| 亚洲精品suv精品一区二区| 日韩午夜毛片| 午夜爱爱电影| 日韩av在线中文| 国产一区二区片| 国产欧美日韩精品一区二区三区 | 国产精品1区二区| 99欧美精品| 国产69精品久久99不卡解锁版 | 亚洲伊人久久影院| 中文字幕精品一区二区三区在线| 中文文精品字幕一区二区| 国产在线干| 国产二区不卡| 93精品国产乱码久久久| 蜜臀久久99精品久久久| 亚洲**毛茸茸| 国产不卡一二三区| 国产精自产拍久久久久久蜜| 97午夜视频| 免费毛片a| 97人人澡人人爽人人模亚洲 | 国产麻豆91视频| 狠狠插狠狠插| 97人人澡人人爽91综合色| 日韩欧美高清一区二区| 日韩午夜毛片| 国产综合久久精品| 亚洲精品乱码久久久久久按摩| 淫片免费看| 日韩精品一区二区av| 亚洲欧美日韩综合在线| 国产精品日韩电影| 91性高湖久久久久久久久_久久99| 国产精品日产欧美久久久久| 国产一区二区三区黄| 97视频一区| 精品国产一区二区三区国产馆杂枝| 精品一区二区三区中文字幕| 国产69精品久久久久777糖心| 久久99亚洲精品久久99| 久99精品| 中日韩欧美一级毛片| 日韩av一区不卡| 中文乱码字幕永久永久电影| 日本福利一区二区| 日本高清二区| 欧美精品一区久久| 国产一区精品在线观看| 99精品国产免费久久| 国产影院一区二区| www.久久精品视频| 97久久精品一区二区三区观看| 久久福利免费视频| 午夜少妇性影院免费观看| 91一区二区三区久久国产乱| 8x8x国产一区二区三区精品推荐| 国产伦理精品一区二区三区观看体验 | 亚洲码在线| 国产麻豆91视频| 日韩精品一区二区不卡| 国产精品综合在线观看| 日韩欧美中文字幕精品| 中文字幕在线播放一区| 国产一区二区大片| 欧洲另类类一二三四区| 国产一区二区极品| 日韩一级片免费视频| 91黄色免费看| 91精品久久久久久综合五月天 | 亚洲va国产2019|