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Variable Valve Lift vs Variable Valve Timing - VVL v...

Engineering Explained Follow
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  • 6 months ago
  • 7,842 views
  • 1,100 likes
  • 191 comments
What is VVL? What is VVT? How does VVL/VVT work?
VW VR6 Engine Explained - https://youtu.be/Y0LKWt3Ttic
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What is variable valve lift? What is variable valve timing? We're going to look at the valvtrain from a 2009 Audi 2.0L I4 Turbo engine to check out the differences. 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 temperatures and thus reducing NOx), but also has performance and efficiency benefits as well.

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