导读汽车上的AMT是什么意思最佳答案AMT：AMT 是指机械式自动变速器，国内已经有这类车出现了。这个比较特殊，其具体情况就是他以手动变速器为母体，将手动变速器的离合器分离及换挡拨...

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汽车上的AMT是什么意思

汽车上的AMT是什么意思

最佳答案AMT：AMT 是指机械式自动变速器，国内已经有这类车出现了。这个比较特殊，其具体情况就是他以手动变速器为母体，将手动变速器的离合器分离及换挡拨叉等靠人力操纵的部件实现自动操纵。即通过电动或液压动力实现。驾驶员操纵汽车和自动变速的一样。这样就实现了手动变速器的自动化。

VVT:发动机可变气门正时技术（VVT，Variavle Valve Timing）是近些年来被逐渐应用于现代轿车上的新技术中的一种，发动机采用可变气门正时技术可以提高进气充量，使充量系数增加，发动机的扭矩和功率可以得到进一步的提高。

CVVT:CVVT是英文Continue Variable Valve Timing的缩写，翻译成中文就是连续可变气门正时机构，它是近些年来被逐渐应用于现代轿车上的众多可变气门正时技术中的一种。例如：宝马公司叫做 Vanos，丰田叫做VVTI，本田叫做VTEC，但不管叫做什么，他们的目的都是给不同的发动机工作状况下匹配最佳的气门重叠角（气门正时），只不过所实现的方法是不同的。

扩展资料：

VVT

活塞式发动机通常通过提升节流阀来进气与排气，提升阀直接或间接地被凸轮轴上的凸轮驱动。在每个进气排气循环中，凸轮驱动气门打开（升程）一定时间（重叠时间）。

在高转速下，发动机需要更多的空气，但是进气气门可能在所需空气完全进入前关闭，造成性能降低，因此气门打开和关闭的正时十分重要。持续打开的气门会导致燃料未经燃烧便排出发动机，会降低发动机的性能并增加排气污染，所以比赛用发动机怠速不能过低。另一方面，如果凸轮持续令气门打开较长时间，像赛车的情况，在较低转速下便会出现问题。

曲轴通过正时皮带、齿轮或链条来驱动凸轮轴，凸轮轴上凸轮的轮廓与位置通常是为特定的发动机转速而优化，通常这会降低发动机在低转速情况下的扭矩和高转速情况下的功率。VVT技术能够使其根据发动机工况进行改变，提高了发动机的效率与动

CVVT

韩国现代轿车所开发的CVVT是一种通过电子液压控制系统改变凸轮轴打开进气门的时间早晚，从而控制所需的气门重叠角的技术。这项技术着重于第一个字母C （Continue连续），强调根据发动机的工作状况连续变化，时时控制气门重叠角的大小，从而改变气缸进气量。

当发动机低速小负荷运转时（怠速状态），这时应延迟进气门打开时间，减小气门重叠角，以稳定燃烧状态。

当发动机低速大负荷运转时（起步、加速、爬坡），应使进气门打开时间提前，增大气门重叠角，以获得更大的扭矩；当发动机高速大负荷运转时（高速行驶），也应延迟进气门打开时间，减小气门重叠角，从而提高发动机工作效率；当发动机处于中等工况时（中速匀速行驶），CVVT也会相对延迟进气门打开时间，减小气门重叠角，此时的目的是减少燃油消耗，降低污染排放。但是CVVT不会控制气门的升程，因此CVVT只能改变引擎的吸排气时间。

参考资料：百度百科：CVVT，百度百科：VVT

帮忙翻译成英文

最佳答案Renault is the world's top ten car companies, France's second largest car company. Founded in 1898, founded by Louis Renault, is also a great interest in mechanical people. Back in 1998, only 21 of Louis. Renault in the Paris suburbs Bion created a rich ancient Solutia Inc Now the Renault car company has been received for the state, is France's biggest state-owned enterprises, but also in the world to produce all types of cars mainly to get into the engine, agricultural machinery, automation equipment, machine tools, electronics industry, which, plastics and rubber industry monopoly industry group.

Renault is the first major development in a world war, it produced for the military guns and ammunition, aircraft and light tanks, designed to make large profits from war Renault. After the war, the company turned to farm machinery and heavy-duty diesel vehicle production, the diesel engine is a world leader in nuclear technology. During World War II, Renault serve as Germany and France, for the German army with a large number of tanks, aircraft engines and other weapons. So after the war, Renault was the French government took over, Louis Renault was arrested. After the war, the French government's support, is the second time Renault period of great development. Company use of the state capital, mergers and many car companies, and played a Renault technical potential to develop new products and more varieties of cars.

Renault Motor Company automotive products is complete, in addition to passenger cars and trucks, the various modified vehicles, special vehicles everything, main brands include Megane (Megane), Clio (Clio), Laguna (Laguna) , Beauty Bank (Twingo), space vehicles (Espace) which Megane compact car models are the most brand cars, all competitors are no match for single-hand cars Megane Scenic was also named the 1997 best car in Europe , is also in the top ten car companies alone this one. Renault next in small passenger cars, commercial vehicles, automated equipment and industrial products four ministries, manages all domestic and foreign subsidiaries. Headquartered in France than in Yako, chairman of the Georges Besse, a total of 22 million employees throughout the year can produce 2.05 million vehicles. New Renault car products Cilo, Renault 19, Renault 25 model, etc Renault Nissan Motor Co. and Samsung Motors partnership.

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