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: 野花社区不卡一卡二| 欧美国产在线看| 亚洲制服丝袜中文字幕| 亚洲高清乱码午夜电影网| 93精品国产乱码久久久| 欧美在线一区二区视频| 日韩不卡毛片| 99久久久国产精品免费无卡顿| 色午夜影院| 国产一区二区中文字幕| 麻豆精品久久久| 热久久一区二区| 国产黄色网址大全| 欧美极品少妇videossex| 日韩精品久久久久久久电影99爱| 国产精品日韩三级| 亚洲区在线| 日本精品一二区| 日本福利一区二区| 一区二区久久久久| 中文字幕一区二区三区乱码视频 | 亚洲精品国产精品国产| 欧美激情在线观看一区| 国产一二区在线观看| 精品国产九九| 国产亚洲精品久久久久久久久动漫 | 亚洲精品国产久| 躁躁躁日日躁网站| 欧美高清xxxxx| 欧美日韩国产在线一区| 国产一区二区三区网站| 精品久久二区| 一区二区三区日韩精品| 69精品久久| 久久婷婷国产香蕉| 午夜裸体性播放免费观看| av午夜剧场| 久久99亚洲精品久久99| 国产精品一区久久人人爽| 国产不卡一区在线| 日本高清h色视频在线观看| 国产天堂一区二区三区| 欧美系列一区| xxxx18日本护士高清hd| 亚洲国产另类久久久精品性| 日韩中文字幕在线一区| 欧美大片一区二区三区| 国产一区二区午夜| 久久久精品99久久精品36亚| 久久99精品久久久久国产越南| 国产不卡一区在线| 久久99久久99精品免观看软件| 日本一区二区三区免费在线| 69久久夜色精品国产69–| 99国产精品免费| 午夜av免费观看| 国产午夜一级片| 国产超碰人人模人人爽人人添| 三级视频一区| 国产精品麻豆一区二区| 国产91视频一区| 精品一区二区三区影院| www.午夜av| 国内精品在线免费| 国产精品久久久久免费a∨大胸 | 精品三级一区二区| 日本高清一二三区| 91精品一区| 中文字幕一区三区| 一区二区三区免费高清视频| 日韩av视屏在线观看| 在线精品国产一区二区三区88| 国产aⅴ一区二区| 一本色道久久综合亚洲精品图片| 国产精品丝袜综合区另类| 精品福利一区| 国产伦精品一区二区三区免费迷| 国产一区日韩一区| 亚洲自拍偷拍一区二区三区| 欧美一区二粉嫩精品国产一线天 | 97久久国产精品| 夜夜精品视频一区二区|