The Innovative Variable Valve Event and Lift System (VVEL) for the New NISSAN V6 and V8 Engine

Authors

T. Fujita, S. Kiga, Nissan Motor Co., Ltd., Kanagawa; S. Tsuruta, Hitachi, Ltd., Kanagawa

Year

2008

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 672

Summary

The most important proposition for sustainable mobility consists in dramatically improving the environmental impact, especially by reducing CO2 emissions, which cause global warming. This aim can be achieved by saving energy, i.e. good fuel economy as well as cleaner emissions. On the other hand, customer’s demand for higher dynamic performance is becoming ever more crucial and widespread providing thus more appeal to the product.


Nissan has recently developed a new variable valve event and lift (VVEL) system that continuously controls both the intake valve lift and the event angles (valve opening and closing timing) over a wide range. Combined with the conventional VTC technology, this VVEL system optimally controls the intake valve timing and lift for matching engine operating conditions. This technical specification enables thus to achieve well-balanced improvement for major performance of engines.


This paper describes the basic configuration of the VVEL system, its electrical control system as well as the effects involved for improving the overall engine performance. Moreover, it also explains the production technology for the applying expansion from V6 to V8. At the same time, the future view of this VVEL technology is introduced.

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