Now, if you want to know more about CVVT. All you need to do is to keep on reading this article because we got a lot to tell you about CVVT and there are going to be mind-blowing. In this article, we will be giving the required information you need to understand certain things about CVVT.


The first innovative valve technology was presented by Porsche, more than a century after the first combustion engine by carl Benz in 1886. The automobile variable valve timing technology by Porsche was called VarioCam.

Continuous Variable Valve Timing (CVVT) is a valve timing technology that controls the timing of a valve lift event and is often used to improve performance, fuel economy, or emission


CVVT engine system adjusts the intake valve timing longer at higher rpm, with the advanced intake valve and longer delayed exhaust, it allows more air to enter the engine at higher rpm. It delivers optimum air-fuel mixture fully filled the combustion chamber and the oil efficiency improves.

This technology gives control over residual exhaust gas within the combustion chamber. When operating at high speeds, the technology opens the intake valve during the middle and end of the compression stroke (there is a moment of overlap where the intake and exhaust gas from the combustion chamber). This provides a great power boost when operating at high speeds.

What is CVVT Transmission?

Continuous variable valve timing (CVVT) is a valve-timing technology that controls the timing of a valve lift events ad is often used to improve performance, fuel economy, or emissions. CVVT allows control over the timing of valve lifts.

The Benefit of Camshaft Gear CVVT

Below is the benefit of Camshaft gear CVVT

  • Fuel consumption reduction.
  • Emission reduction for environment friendly.
  • Torque increased at low speed so car performance improved.
  • Overall, the power distribution is better across the different RPM ranges.

Above are the goodies and benefit you will get from Camshaft gear CVVT.

Symptoms of a Bad or Failing Variable Valve Timing (VVT)

Here are some of the symptoms of a bad failing variable valve timing.

  • Poor Fuel Economy Performance: if the CVVT has malfunctioned, it will fail to control the valves open and close at the precise time to optimize the fuel performance and reduce the emission.
  • Check Engine Light On: whatever the electrical component is failing, the vehicle’s ECU will activate the Check Engine Light to alert us. S when the VVT is sending inaccurate data to ECU, ECL will be on and it is telling us to diagnose the potential problems.
  • Engine Rough Idle: VVT adjusted the intake & close timing according to the engine RPM. If the VVT is failing, the adjustment function will be compromised, and too much oil will flow into the VVT gears and cause the engine to Idle rough.
  • Poor acceleration: The faulty VVT will fail to inform the engine for the instant acceleration, you will feel the poor acceleration and sometimes the engine misfire appears

Above are some of the systems of a failing variable valve timing (VVT). If you notice any of the above symptoms it is advisable for you to do something about it urgently.

What is the difference between CVVT and VVT?

Variable Valve Timing (VVT): A variable valve timing system. The CVVT acronym stands for continuation valve timing in English. Transacting the valve signal into Chinese involves a steady, reliable transmission. Modern cars continue to include variable valve timing valves as part of the technological advances that have brought change to the industry over the past few years.

What does CVVT Mean on a Car?

Variable valve technology with timing and lift Variable Valve Timing (CVVT) controls the timing of valve lift events, which is increasingly being used for engine performance improvement, fuel economy efficiency, and emission reductions.


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