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: 国产在线精品区| 亚洲国产一区二| xxxx国产一二三区xxxx| 日本一码二码三码视频| 91香蕉一区二区三区在线观看| 激情久久一区二区| 国产一级不卡视频| 国产欧美一区二区三区不卡高清| 国产精品人人爽人人做av片| 一区二区久久精品| 国产午夜三级一区二区三| 国产一二区精品| www.午夜av| 亚洲精品主播| 精品久久二区| 欧美日韩精品在线播放| 93精品国产乱码久久久| 国产午夜亚洲精品羞羞网站| 自拍偷在线精品自拍偷无码专区| 国产精品一区二区中文字幕| 中文字幕制服丝袜一区二区三区| 蜜臀久久99精品久久久| 亚洲va国产2019| 日韩av在线中文| 精品少妇一区二区三区| 国产一a在一片一级在一片| 国语对白一区二区三区| 久久国产精品久久| 久久久久国产精品一区二区三区| 国产激情视频一区二区| 中文无码热在线视频| 精品久久久久久久免费看女人毛片| 欧美日韩国产精品综合| 国产午夜精品一区二区三区最新电影| 久久精品视频中文字幕| 国产精品videossex国产高清| 日本道欧美一区二区aaaa| 国产一二区精品| 农村妇女毛片精品久久| 99久久精品免费看国产免费粉嫩 | 久久久久亚洲精品视频| 久久久久久中文字幕| 国产区一区| 欧美激情综合在线| 国产足控福利视频一区| 国产日韩欧美亚洲综合| 国产欧美一区二区三区精品观看| 香港三日本三级三级三级| 亚洲国产精品一区二区久久,亚洲午夜| 精品一区二区三区影院| 久久久久国产精品嫩草影院| 精品一区中文字幕| 国产综合亚洲精品| 国产欧美精品va在线观看| 日韩一区二区精品| 91福利试看| 国产精品一区一区三区| 国产亚洲精品久久久久久久久动漫| 国产精品自产拍在线观看桃花| 国产91色综合| 欧美亚洲视频二区| 国产91色综合| 精品国产18久久久久久依依影院| 99re久久精品国产| 国产精品白浆一区二区| 午夜av电影院| 日韩一级视频在线| 国产色婷婷精品综合在线手机播放| 久久国产欧美一区二区免费| 国产一区二区三区大片| 欧美日韩精品不卡一区二区三区 | 日本午夜一区二区| 欧美久久精品一级c片| 久久久久久亚洲精品| 日韩精品一区三区| 91亚洲国产在人线播放午夜| 在线视频国产一区二区| 午夜av资源| 日本高清h色视频在线观看| 国产91在线拍偷自揄拍| 亚洲精品国产一区| 国产精品9区|