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: 免费久久99精品国产婷婷六月| 欧美一区二区精品久久| 国产精品久久久久久久久久久不卡| 中文字幕久久精品一区| 亚洲色欲色欲www| av午夜剧场| 日韩三区三区一区区欧69国产 | 91精品免费观看| 亚洲国产精品97久久无色| 欧美日韩国产免费观看| 国产欧美一区二区精品婷| 国产精品国产三级国产专区55| 国产一区二区在线免费| 国产理论一区二区三区| 国产日韩欧美三级| 素人av在线| 蜜臀久久精品久久久用户群体| 国产视频在线一区二区| 强制中出し~大桥未久4| 91国偷自产中文字幕婷婷| 亚洲理论影院| 亚洲日韩欧美综合| 国产一区二区极品| 99爱精品在线| 亚洲欧美v国产一区二区| 91免费国产视频| 99久久久国产精品免费调教网站| 麻豆国产一区二区三区| 中文字幕一区二区三区不卡| 亚洲无人区码一码二码三码| 国产亚洲精品久久久久动| 女人被爽到高潮呻吟免费看 | 久99久精品| 91麻豆精品国产91久久久久| 国产女人和拘做受视频免费| 国产精品久久久不卡| 日日噜噜夜夜狠狠| 国产一级片大全| 国产精品久久国产三级国电话系列| 国产精品久久久久久久久久久久久久不卡| 高清欧美精品xxxxx| 国产日韩一区在线| 午夜私人影院在线观看| aaaaa国产欧美一区二区| 夜夜躁人人爽天天天天大学生| 久久夜靖品2区| 国产乱人乱精一区二视频国产精品| 2020国产精品自拍| 理论片午午伦夜理片在线播放| 久久91久久久久麻豆精品| 国产一区日韩欧美| 国产一卡二卡在线播放| 国产高清在线精品一区二区三区| 日本一二三不卡| 欧美精品免费视频| 欧美精品日韩精品| 亚洲精品人| 国产亚洲综合一区二区| 欧美高清xxxxx| 午夜精品在线观看| 玖玖爱国产精品| 国产人成看黄久久久久久久久| 国产精品爽到爆呻吟高潮不挺| 国产精品96久久久久久久| 欧美日韩国产一二| 国产另类一区| 国产午夜伦理片| 国产极品一区二区三区| 精品福利一区| 日本少妇一区二区三区| 国产99久久九九精品| 国产精品乱战久久久| 国产一级片网站| 欧美一区二区色| 精品久久久久久中文字幕大豆网| 99国产精品99久久久久久粉嫩 | 亚洲精品一区中文字幕| 国产在线不卡一区| 久久国产精品网站| 一区二区欧美在线| 精品国产乱码久久久久久虫虫| 亚日韩精品|