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: 国产一级大片| 久久久中精品2020中文| 欧美日韩国产区| 91国内精品白嫩初高生| 国产一区二区三区小说| 鲁丝一区二区三区免费观看| 欧美一区二粉嫩精品国产一线天| 久久密av| 久久国产精品二区| 搡少妇在线视频中文字幕| 海量av在线| 欧美综合国产精品久久丁香| 国产精品99在线播放| 国产一卡二卡在线播放| 激情久久一区二区三区| 国产视频二区| 免费久久一级欧美特大黄| 精品久久久久久亚洲综合网| 久久免费精品国产| 色综合久久88| 久久久久久久久亚洲精品| 亚洲国产一区二区久久久777| 亚洲国产精品区| 欧美高清视频一区二区三区| 国内自拍偷拍一区| 日韩午夜电影在线| 麻豆精品久久久| sb少妇高潮二区久久久久| 亚洲精品一区二区另类图片| 国产精欧美一区二区三区久久| 2020国产精品自拍| 99视频国产精品| 久久99精品一区二区三区| 色婷婷精品久久二区二区6| 欧美一区免费| 日本一区二区三区在线视频| av午夜剧场| 久久精品爱爱视频| 国产精品九九九九九九九| 国产国产精品久久久久| 亚洲乱在线| 久久精品一二三| 亚洲天堂国产精品| 国产伦精品一区二区三区免费优势| 国产淫片免费看| 国产精品久久国产三级国电话系列| 国产精品一区久久人人爽| 久久精品手机视频| xxxxhd欧美| 国产精品视频免费看人鲁| 国产videosfree性另类| 欧美在线精品一区| 2023国产精品自产拍在线观看| 亚洲午夜天堂吃瓜在线| 久久伊人色综合| 国产精品久久久久精| 日韩av三区| 国产一区二区精品在线| 久久久久久中文字幕 | 国产精品电影免费观看| 亚洲精欧美一区二区精品| 欧美激情精品久久久久久免费| 日本一区二区高清| 特级免费黄色片| 日韩av在线导航| 国产精品亚洲二区| 91制服诱惑| 性欧美激情日韩精品七区| 精品欧美一区二区精品久久小说| 久久影视一区二区| 狠狠色噜噜狠狠狠狠2021免费| 午夜黄色大片| 午夜一二区| 日韩av一区不卡| 欧美精品八区| 欧美激情午夜| 综合久久一区| 日本一二区视频| 国产精品999久久久| 日韩精品一区二区三区免费观看视频| 国产精品videossex国产高清| 午夜无遮挡|