Toyspeed.org.nz Message Board

by **lucasthefallen** » Sat Feb 28, 2009 8:37 pm

have just been on a new car features training course for work, all about the new avensis and " valvematic ". personally i think its a great idea, unfortunatly i cant post the material given to me in the course but i've googled some stuff. oh and its nothing like v-tec or the 2zz's variable lift setup.

lift varies from 1mm to 11mm and duration from 106 degrees to 280 degrees.

http://www.toyota.co.jp/en/news/07/0612.html

http://paultan.org/archives/2007/06/13/ ... echnology/

http://www.netcarshow.com/toyota/2009-avensis/

by **Burning Angel** » Sat Feb 28, 2009 8:52 pm

looks just like BMW's valvetronic with dual vanos
http://www.youtube.com/watch?v=RE5Tx47-b24

by **lucasthefallen** » Sat Feb 28, 2009 8:55 pm

exactly the same result, but IMO the toyota's setup is more reliable mechanically.

recommended oil for the motor is 0w20

by **Stott69** » Sat Feb 28, 2009 9:07 pm

thats a thin oil!

by **barryogen** » Sat Feb 28, 2009 10:07 pm

interesting... but 150HP from a 2L engine... hardly exciting performance.

For some reason I was expecting to read 230HP from a 2L or similar, but with a better torque curve than typical high HP/L.

by **Twolitre** » Sat Feb 28, 2009 10:15 pm

Saab's variable compression engine was revolutionary a few years ago but god knows what happened to that.

by **Mr Revhead** » Sat Feb 28, 2009 11:43 pm

yeah that was pretty cool!
when i read about it they had just solved the sealing issues and got it running
seems to have dropped of the face of the earth....

by **Mr Revhead** » Sat Feb 28, 2009 11:44 pm

wiki wrote:The SVC project was shelved by General Motors, when it took over Saab Automobile, due to cost

hmmmmm

by **flygt4** » Sun Mar 01, 2009 8:24 am

but... if they make engines that are too efficient and reliable, we won't spend as much on gas, servicing and repairs :lol:

by **Lith** » Sun Mar 01, 2009 9:53 am

Sweet there is going to be A-VTEC as well

Nissan's variable compression system is due to show up in cars fairly soon: http://www.nissan-global.com/EN/TECHNOLOGY/INTRODUCTION/DETAILS/VCR/
http://loadinform.com/2010-nissan-silvia/

by **barryogen** » Mon Mar 02, 2009 8:21 pm

That multi compression system form Nissan looks interesting... looks to have few moving parts, which tends to mean less things to break.

by **bluemaumau** » Mon Mar 02, 2009 8:29 pm

barryogen wrote:That multi compression system form Nissan looks interesting... looks to have few moving parts, which tends to mean less things to break.

cough rotary cough

by **barryogen** » Mon Mar 02, 2009 10:12 pm

that is the reason why I said "tends" not "will always" :lol:

by **Timmo** » Tue Mar 03, 2009 9:55 am

I think the internal combustion engine is near the end of its life for a lot of uses....engine developers seem to spend millions just to get an extra 2% efficiency or power...

Electric powertrains are almost zero maintenance, no weighty/bulky exhausts, diffs, gearboxes etc, battery tech just keeps getting better and better too....they are my pic for the future of personal propulsion

by **sergei** » Tue Mar 03, 2009 11:47 am

Timmo wrote:I think the internal combustion engine is near the end of its life for a lot of uses....engine developers seem to spend millions just to get an extra 2% efficiency or power...

Electric powertrains are almost zero maintenance, no weighty/bulky exhausts, diffs, gearboxes etc, battery tech just keeps getting better and better too....they are my pic for the future of personal propulsion

That is exactly what will happen.
100% electric drive train, with either/both fuel cell and batteries.

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Valvematic.... way of the future?

Valvematic.... way of the future?

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