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: 国产欧美一区二区精品久久| 国产婷婷一区二区三区久久| 色婷婷综合久久久久中文| 亚洲久久在线| 狠狠色狠狠色综合系列| 欧美一区二区三区精品免费| 国产一区第一页| 亚洲精品日本久久一区二区三区| 亚洲精品久久在线| 日本亚洲国产精品| 精品国产九九| 欧美性二区| 国产精品一区不卡| 午夜在线观看av| 日韩亚洲欧美一区二区| 右手影院av| 亚洲精品一区二区三区香蕉| 欧美久久一区二区三区| 久久精品视频3| 国产一二区在线| 欧美乱偷一区二区三区在线| 欧美乱妇在线视频播放| 国产69精品久久99的直播节目| 日本伦精品一区二区三区免费| 大桥未久黑人强制中出| 久久精视频| 久久99精品国产麻豆婷婷洗澡| 久久国产麻豆| 久久99精品久久久噜噜最新章节| 久久精品手机视频| 欧美日韩综合一区二区| 高清欧美精品xxxxx在线看| 欧美一区二区在线不卡| 538国产精品| 91精品一区二区中文字幕| 国产一区二区高潮| 国产午夜亚洲精品午夜鲁丝片| 狠狠色噜噜狼狼狼色综合久| 欧美一级免费在线视频| 日韩精品中文字幕一区| 99久精品视频| 欧美一区二区三区久久| 国产精品一区二区av日韩在线| 日本精品99| 欧美精品日韩| 久99久精品| 国产午夜精品一区二区三区四区 | 国产资源一区二区三区| 国产91热爆ts人妖在线| 日韩一级片免费观看| 欧美日韩中文国产一区发布| 国产精品自产拍在线观看蜜| 国产精品精品视频一区二区三区| 7799国产精品久久99| 国产偷久久一区精品69| 综合久久一区| 精品一区二区超碰久久久| 69精品久久| 国产精品高潮呻吟三区四区| 91福利视频导航| 中文字幕一区二区三区日韩精品| 国产日韩欧美精品一区二区| 欧美日韩国产一二三| 欧美一区二区三区性| 国产欧美一区二区精品婷| 精品久久不卡| 久久99国产精品视频| 久久网站精品| 国产理论片午午午伦夜理片2021| 久久国产精品久久久久久电车| 欧美黑人巨大久久久精品一区| 国产麻豆精品一区二区| 一区不卡av| 午夜电影理伦片2023在线观看| 香蕉免费一区二区三区在线观看| 中文字幕一区二区三区不卡| 国产精品乱码一区二区三区四川人| 国产中文字幕一区二区三区 | 狠狠躁夜夜躁2020| 日本一区免费视频| 亚洲欧美国产一区二区三区| 91性高湖久久久久久久久_久久99|