Variable valve lift is used to enhance performance depending on the RPM and load, while variable valve timing is typically used for emissions control (lowering combustion...

Variable valve lift (VVL) is an automotive piston engine technology which varies the height a valve opens in order to improve performance, fuel economy or emissions. There are two main types of VVL: discrete, which employs fixed valve lift amounts, and continuous, which is …

到了80年代末，随着ECU+电喷车型的普及，一项一直以来只是设想的技术终于开始被本田大规模应用在车上，那就是VVT和VVL技术。 说起这项技术，我首先给大家降为解释一下其原理吧。 首先，我们都知道4冲程发动机包含吸气压缩做功排气4个冲程，这其中曲轴和活塞的运行过程是恒定不变的（当然现在也又可以变的了，以后有机会再说这一块)。 而进气排气用的气门，无论是挺杆，单顶置凸轮轴还是双顶置凸轮轴，都是由曲轴驱动的，这虽然确保了进排气阀门和发动机匀 …

Variable valve lift (VVL) and variable valve timing (VVT) are two of the most common dynamic valvetrain features found in modern commuter cars and even many of today’s performance cars.

Modern vehicles have the be ability to change valve timing, lift amount and duration. This has brought significant improvement in horsepower, fuel economy a...

2016年10月20日 · VVL主要有两种：连续可变气门升程技术（CVVL）和两级可变气门升程技术（DVVL）， 连续可变气门升程技术以BMW的valvetronic为代表： 这里简单介绍一下由上汽技术中心动力总成前期工程部开发的一款连续可变气门升程机构：

2014年7月7日 · As for VVL, my GTI's 2nd Gen EA888 has VVL. It would not make sense for VVL to be absent from the 3rd Gen EA888. MPI, as described in a Europe press-release, helps prevent carbon build-up in the EA888 engine by injecting fuel before the valves at low revs and FSI takes over at high revs for increased efficiency and performance.

2019年7月12日 · VVT is Variable Valve timing where VVL is Variable valve lift. This is just a way that the manufacturers get the engines to be super light on petrol and give good emissions results. One again there is many ways to achieve VVL.

2010年6月11日 · I was just wondering why VW never built any engines with a Variable valve lift system, like you find with Honda Vtec, Nissan Neo VVL & RunX Rsi. I know that some G4 Gti motor's have a VVT system. Cheers

2017年1月11日 · Variable valve lift (VVL) and variable valve timing (VVT) are two of the most popular ones. These systems sound pretty similar, but what do they actually do? Luckily, there's...