Variable valve timing (VVT) is the process of altering the timing of a valve lift event in an internal combustion engine, and is often used to improve performance, fuel economy or emissions. It is increasingly being used in combination with variable valve lift systems.

The benefits of Continuous Variable Valve Timing (CVVT) or more generally known as Variable Valve Timing (VVT), is known in the Automotive Industry including after market high performance sectors to improve engine efficiency by a respectable double digit margin. Notable potential of CVVT is exposure to camshaft degreeing.

VVT一般指可变气门正时。可变气门正时（VVT, Variable Valve Timing），是一种用于汽车活塞式发动机中的技术。 VVT技术可以调节发动机进气排气系统的重叠时间与正时，简单说就是发动机电脑根据不同的工况在一定范围内调整气门开启和关闭的时间的方式来优化进气量，从而降低油耗并提升效率. 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;一般只是对进气侧气门可变正时。 DVVT全称是：Dual Variable Valve Timing.意思是进 …

CVVT是Continue（持续的）Variable（可变的）Valve（气门）Timing（正时）的缩写，翻译过来就是持续可变的气门正时，我们通常称其为连续可变气门正时。 早期的可变气门正时系统功能比较简单，只有两个调节位置，一种是低转速位置，另一种是高转速位置。

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 ...

This bulletin provides information regarding the inspection and/or replacement of the E-CVVT cover or O-ring and replacement of the motor plug on some 2016-2017MY Optima (JF, JFa), 2016-2017MY Sorento (UMa), and 2017MY Sportage (QL) vehicles, equipped with 2.4L GDI or 2.0T-GDI, which may exhibit a malfunction indicator light (MIL) ON with DTC P0...

2022年5月26日 · Consider what kind of CVVT mechanism it is, what is its principle of operation, its structure, and common malfunctions. In short, a motor equipped with a cvvt mechanism is a power unit in which the timing phases change depending on the loads on the engine and the crankshaft speed. This system began to gain popularity back in the 90s. last century.

2020年9月24日 · What is CVVT (Continuously Variable Valve Timing) System. The CVVT is Hyundai named for his VVT, same as Kia cvvt engine, positioned at hyundai sonata exhaust camshaft, controls the open & close timing of intake valve to improve engine performance.

E-CVVT controls the DC motor current (duty signal) to more closely control the system compared to the previous pressure type, to increase reaction speed of cam, to improve startability, and to reduce the emission of exhaust gas.

2025年1月9日 · 在汽车发动机技术中，CVVL（连续可变气门升程）和VVT（可变气门正时）都是为了提升发动机性能、提高燃油效率和减少排放而设计的先进技术。 尽管两者都涉及气门控制，但它们的工作原理和功能有所不同。 汽修厂管理系统APP 和大家解析两者的区别！ VVT：可变气门正时. VVT技术主要通过调节气门的开闭时机来优化发动机的性能。 在不同的转速下，VVT可以改变进气和排气气门的开启与关闭时间，从而改善燃烧效率。 低转速时，VVT会延迟气门的开 …