Nissan VVEL = Variable Valve Event and Lift

[CMF_nz_aj]

Petrol engine, no throttle butterfly, use variable valve lift instead.

http://www.nissan-global.com/EN/NEWS/2007/_STORY/070329-01-e.html
and
http://www.nissan-global.com/EN/TECHNOLOGY/INTRODUCTION/DETAILS/VEL/index.html

The new Skyline Coupe has it. VQ37VHR motor 11.0:1 CR, 95.5mm bore, 86mm stroke, 7500rpm redline.

Video of how it works

This is very similar concept to BMW valvetronic http://www.bmwworld.com/technology/valvetronic.htm
The BMW system has more mass & friction so is limited to ~6000rpm
VVEL responds 32% quicker than Valvetronic and is 20% smaller and uses 52% less parts per cylinder

Honda also has a similar system in the wings, Advanced VTEC or AVTEC but I'm not aware of it being in any production car
http://paultan.org/archives/2007/04/17/honda-files-advanced-vtec-patent/

 

[CMF_MicraNut]

nz_aj WROTE:

"Petrol engine, no throttle butterfly, use variable valve lift instead.<BR><BR><A title=http://www.nissan-global.com/EN/NEWS/2007/_STORY/070329-01-e.html href="http://www.nissan-global.com/EN/NEWS/2007/_STORY/070329-01-e.html" target=_blank>http://www.nissan-global.com/EN/NEWS/2007/_STORY/070329-01-e.html</A><BR>and <BR><A title=http://www.nissan-global.com/EN/TECHNOLOGY/INTRODUCTION/DETAILS/VEL/index.html href="http://www.nissan-global.com/EN/TECHNOLOGY/INTRODUCTION/DETAILS/VEL/index.html" target=_blank>http://www.nissan-global.com/EN/TECHNOLOGY/INTRODUCTION/DETAILS/VEL/index.html</A><BR><BR>The new Skyline Coupe has it. VQ37VHR motor 11.0:1 CR, 95.5mm bore, 86mm stroke, 7500rpm redline.<BR><BR>Video of how it works <A title= href="" target=_blank></A><BR><BR>This is very similar concept to BMW valvetronic <A title=http://www.bmwworld.com/technology/valvetronic.htm href="http://www.bmwworld.com/technology/valvetronic.htm" target=_blank>http://www.bmwworld.com/technology/valvetronic.htm</A><BR>The BMW system has more mass &amp; friction so is limited to ~6000rpm <BR>VVEL responds 32% quicker than Valvetronic and is 20% smaller and uses 52% less parts per cylinder<BR><BR>Honda also has a similar system in the wings, Advanced VTEC or AVTEC but I'm not aware of it being in any production car<BR><A title=http://paultan.org/archives/2007/04/17/honda-files-advanced-vtec-patent/ href="http://paultan.org/archives/2007/04/17/honda-files-advanced-vtec-patent/" target=_blank>http://paultan.org/archives/2007/04/17/honda-files-advanced-vtec-patent/</A>

Looks good. It's exciting to know that the co2 outputs of petrol engines can be lowered and fuel economy can be increased by using the VVEL system.

it seems to me that petrol engines could become even more efficient than diesel engines and even cheaper to tax/insure/run than diesels thanks to VVEL. Good job Nissan!