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: 玖玖爱国产精品| 国产精品一区二区中文字幕| 午夜叫声理论片人人影院| 日韩av在线高清| 99国产午夜精品一区二区天美| 国产精品一区二区人人爽| 97国产精品久久久| 美女直播一区二区三区| 精品一区二区三区中文字幕| 亚洲日韩欧美综合| 精品国产免费久久| 国产九九影院| 久久精品—区二区三区| 中文乱码字幕永久永久电影| 国产视频二区| 国产一区二区三区黄| 日韩一区二区精品| 日本午夜无人区毛片私人影院| 狠狠干一区| 夜夜爱av| 狠狠色噜噜狠狠狠狠奇米777| 国产剧情在线观看一区二区| 久久99久久99精品免观看软件 | 亚洲欧美日韩国产综合精品二区 | 中文字幕在线播放一区| 欧美精品免费视频| 99久久精品一区| 亚洲精品少妇一区二区 | 日韩av在线电影网| 美女销魂免费一区二区| 美女脱免费看直播| 99久久国产综合精品麻豆| 欧美日韩国产精品一区二区三区| 日韩欧美国产中文字幕| 97人人澡人人爽人人模亚洲| 精品美女一区二区三区| 99久久99精品| 高清欧美精品xxxxx在线看| 欧美日韩一卡二卡| 国产一区免费在线| av午夜在线| 欧美在线免费观看一区| 欧美67sexhd| 精品一区中文字幕| 国产盗摄91精品一区二区三区| 欧美人妖一区二区三区| 国产精品1区二区| 亚洲色欲色欲www| 九九热国产精品视频| 国产精品一级片在线观看| 国产综合亚洲精品| 欧美一区二区三区艳史| 日韩精品中文字幕久久臀| 草逼视频网站| 国产精品麻豆一区二区三区| 高清国产一区二区 | 91国偷自产中文字幕婷婷| 国产精品日韩电影| 欧美性xxxxx极品少妇| 亚洲v欧美v另类v综合v日韩v| 一级久久久| 国产欧美一区二区精品性色超碰| 国产91丝袜在线| 色噜噜狠狠色综合久| 国产一区二区电影| 在线国产精品一区二区| 欧美久久精品一级c片| 日韩中文字幕一区二区在线视频| 一级午夜影院| 欧美日韩国产一二| 国产麻豆一区二区三区在线观看| 欧美亚洲国产日韩| 欧美精品免费一区二区| 午夜电影网一区| xxxxx色| 国产精品视频一区二区在线观看 | 国产精品麻豆一区二区| 欧美一区二区三区黄| 国产在线一卡二卡| 久久国产欧美一区二区免费| 国产伦精品一区二区三区免费迷| 91黄在线看 |