toyota's new valvematic
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thanks to apollo from MCF....
Toyota has something new up itÂ’s sleeves - Valvematic, an evolution of the VVT-i mechanism which now incorporates continuous valve lift control together with VVT-iÂ’s existing valve timing control. Valvematic also eliminates the need for a throttle valve, instead controlling the volume of intake air using valve lift instead.
According to Toyota, an improvement of 5% to 10% can be seen with fuel efficiency, as well as an improvement of 10% with the power output on a similiar engine displacement comparison. Toyota also mentions reduced CO2 emission as well as improved acceleration responsiveness.
The first Valvematic-equipped engine will be a 2.0 liter model, most likely a replacement for the 145 horsepower 1AZ-FE engine which has been pretty much slotted with different tune levels into all Toyota cars in the C-segment and above. The trademark “Valvematic” was registered by Toyota a few months ago, so alot of people have been expecting this. One of the first few cars to get the new Valvematic 2.0 liter engine are the 2.0 liter versions of the recently launched twin sedans Toyota Allion and Toyota Premio. The 2.0 liter variants are set to debut in Winter 2007.
http://paultan.org/archives/2007/06/13/toyota-reveals-valvematic-technology/
from the looks of it..... honda fans could soon be losing their bragging rights....
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why can't toyota just make every car a hybrid? I think it's better than spending millions on research to come up with new valvetrains.
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Look at it from another angle, when they come up with more efficient internal combustion engines and partner it with batteries and electric motors, won't it be even more fuel-efficient than today's available hybrid cars like Toyota's Prius?Originally posted by TwinTurbo_Supra:why can't toyota just make every car a hybrid? I think it's better than spending millions on research to come up with new valvetrains.
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thats almost the same system as the Boffins in BMW created which uses valve lift for controlling induction and eliminating the use of a throttle valve...but however theres still one for a failsafe feature.....we call that "valvetronic" but then again there are disadvantages to this system like amore complicated valvetrain system and more things for it to go wrong...trust me on this...and more imptly u cant mod its preformanceOriginally posted by n0x:Toyota has something new up itÂ’s sleeves - Valvematic, an evolution of the VVT-i mechanism which now incorporates continuous valve lift control together with VVT-iÂ’s existing valve timing control. Valvematic also eliminates the need for a throttle valve, instead controlling the volume of intake air using valve lift instead.
According to Toyota, an improvement of 5% to 10% can be seen with fuel efficiency, as well as an improvement of 10% with the power output on a similiar engine displacement comparison. Toyota also mentions reduced CO2 emission as well as improved acceleration responsiveness.
The first Valvematic-equipped engine will be a 2.0 liter model, most likely a replacement for the 145 horsepower 1AZ-FE engine which has been pretty much slotted with different tune levels into all Toyota cars in the C-segment and above. The trademark “Valvematic” was registered by Toyota a few months ago, so alot of people have been expecting this. One of the first few cars to get the new Valvematic 2.0 liter engine are the 2.0 liter versions of the recently launched twin sedans Toyota Allion and Toyota Premio. The 2.0 liter variants are set to debut in Winter 2007.
http://paultan.org/archives/2007/06/13/toyota-reveals-valvematic-technology/
from the looks of it..... honda fans could soon be losing their bragging rights.... 
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so u mean BMW phased out the VANOS liao ah???Originally posted by AE86tofu:thats almost the same system as the Boffins in BMW created which uses valve lift for controlling induction and eliminating the use of a throttle valve...but however theres still one for a failsafe feature.....we call that "valvetronic" but then again there are disadvantages to this system like amore complicated valvetrain system and more things for it to go wrong...trust me on this...and more imptly u cant mod its preformance -
it works in conjunction with VANOS la....and like i said this system is meant for economy not for performance....as our //M engines dont have this...they still stick to the twin vanos and even cast iron block for that matterOriginally posted by n0x:so u mean BMW phased out the VANOS liao ah???