Nissan Boosting Fuel Econ with VVEL



Nissan says its new variable valve timing system will cut emissions of carbon dioxide in new engines by as much as ten percent.

The system, dubbed VVEL (Variable Valve Event and Lift) and C-VTC (Continuous Valve Timing Control) will be spread across the Nissan and Infiniti product lineups after its worldwide debut at the 2007New York auto show. The G37, also making its debut at the show, will be the first vehicle to showcase the new technology.


Nissan explains the new system as a departure from typical air-intake systems, which can use throttle valves to control air-fuel mix. The VVEL system controls air at the intake valve, while the C-VTC system controls how the valves rise and fall to take in fuel and air and expel exhaust. The combination of the two technologies improves response, improves airflow in the cylinder, and boosts power and torque.


Nissan adds that the VVEL system works best at low to medium engine speeds. As such, the automaker says it will work better with larger engines with more cylinders.


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