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: 国产超碰人人模人人爽人人添| 年轻bbwwbbww高潮| 国产日韩精品一区二区| 久久人人97超碰婷婷开心情五月| 国产欧美日韩一区二区三区四区| 国产精品久久久不卡| 精品国产一区二区三| 久久伊人色综合| 99久久久国产精品免费调教网站| 精品国产91久久久久久久| 国产精品爽到爆呻吟高潮不挺| 日本aⅴ精品一区二区三区日| 91在线一区二区| 国模少妇一区二区三区| 欧美日韩激情一区| 亚洲精品www久久久久久广东| 欧美日韩亚洲另类| 国产精品丝袜综合区另类| 国产精品欧美久久| 精品videossexfreeohdbbw| 国产日产精品一区二区| 精品国产一区二| 国产欧美日韩综合精品一| 99国产精品丝袜久久久久久| 国产白嫩美女在线观看| 免费超级乱淫视频播放| 午夜影院毛片| 中文字幕制服丝袜一区二区三区| 国产精品久久久久免费a∨大胸| 狠狠躁日日躁狂躁夜夜躁av | 欧美三级午夜理伦三级老人| 亚洲精品456| 亚洲高清乱码午夜电影网| 狠狠插狠狠插| 高清欧美xxxx| 久久精品麻豆| 99精品久久99久久久久| 国产一区二区精品免费 | 日韩精品一区二区三区中文字幕| 神马久久av| 国产精品免费一区二区区| 国产女人与拘做受免费视频| 国产精品欧美久久| 国产大片一区二区三区| 亚洲精品少妇久久久久| 国产精品影音先锋| 亚洲乱强伦| 欧美日韩久久一区二区| 国产欧美日韩中文字幕| 色噜噜狠狠色综合中文字幕| 欧美精品日韩精品| 久久精品二| 精品久久9999| 思思久久96热在精品国产| 日韩av一区二区在线播放| 国产精品视频一区二区二| 狠狠躁夜夜躁2020| 日韩精品一区在线观看| 欧美高清xxxxx| 国产精品视频一区二区在线观看| 久久国产精品99国产精| 国产精品女人精品久久久天天| 国产精品日韩一区二区| 国产精品久久久久久久龚玥菲| 久久久99精品国产一区二区三区| 国精偷拍一区二区三区| 国产精品日韩一区二区| 午夜伦全在线观看| 久久99精品久久久秒播| 精品久久9999| 97人人模人人爽人人喊小说| 夜夜躁人人爽天天天天大学生| 97视频久久久| 日韩av中文字幕第一页| 性国产日韩欧美一区二区在线 | 国产偷亚洲偷欧美偷精品| 久久国产精久久精产国| 91av精品| 国产精品综合在线观看| 中文字幕一区二区三区乱码视频| 在线观看欧美日韩国产| 国产大片一区二区三区|