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: 国产区91| 国产电影一区二区三区下载| 美女张开腿黄网站免费| 日本激情视频一区二区三区| 欧美日韩国产综合另类| 午夜av片| 国产在线欧美在线| 国产欧美日韩亚洲另类第一第二页| 国产又色又爽无遮挡免费动态图| 免费毛片a| 国产一区日韩一区| 91嫩草入口| 亚洲精品日日夜夜| 久久综合二区| 欧美乱战大交xxxxx| 亚洲乱亚洲乱妇28p| 国产午夜精品一区二区三区在线观看 | 国产黄色网址大全| 欧美二区精品| 午夜影院试看五分钟| 国产高清一区二区在线观看| 亚洲精品国产一区二| 久久国产中文字幕| 欧美精品在线观看视频| 97视频一区| 国产一区二区中文字幕| av中文字幕一区二区| 亚洲精品国产久| 国产一区二区精品在线| 中文字幕在线播放一区| 中文字幕一区二区三区又粗| 免费毛片**| 午夜wwww| 日韩精品在线一区二区三区| 精品国产乱码久久久久久虫虫| 午夜电影一区| 欧美精品在线观看视频| 欧美一级久久精品| 国产二区不卡| 97人人模人人爽视频一区二区| 91视频一区二区三区| 国产的欧美一区二区三区| 69精品久久| 国产极品美女高潮无套久久久| 国产特级淫片免费看| 欧美xxxxxhd| 夜夜爽av福利精品导航| 国产三级欧美三级日产三级99| 色噜噜狠狠色综合影视| 国产99久久久国产精品免费看| 亚州精品中文| 国产综合亚洲精品| 大bbw大bbw巨大bbb| 国产一区二区三区中文字幕| 久久久一二区| 国产精品一区二区中文字幕| 久久99精品国产麻豆婷婷| 日韩中文字幕亚洲欧美| 精品国产1区2区3区| 久久中文一区二区| 国产清纯白嫩初高生在线观看性色| 鲁丝一区二区三区免费| 国产午夜精品一区| 免费看片一区二区三区| 97精品超碰一区二区三区| 精品无人国产偷自产在线 | 欧美精品中文字幕亚洲专区| 9999国产精品| 久久国产精品99国产精| 亚洲乱码av一区二区三区中文在线:| 国产精品一区一区三区| 91中文字幕一区| 狠狠躁夜夜躁2020| 日本高清一二三区| 69xx国产| 午夜性电影| 日本精品99| 欧美国产亚洲精品| 国产91在| 一区二区久久精品| 狠狠色噜噜狠狠狠狠777| 免费xxxx18美国|