As some of you know the 3s-ge that s in some Altezza models in Japan has dual vvt-i and put out 210 hp on a 2.0 litre engine, thats without lift.
So I have been doing somresearch the past couple of days and this is what I cam up with, any comments or suggestion no how to do it would be greatly appreciated.
These are translations from mostly japanese pages so if some stuuf doesn't make sense please understand..
DUAL VVT-i
( Dual Variable Valve Timing - intelligent )
* The intake and the exhaust camshaft it responded to operational state valve timing
Controlling, advanced * low improvement of fuel economy and emission efficiency you assure
By the VVT-i pulley the variable angle
Intake side Exhaust Side
Consecutively 50 degree Consecutively 30 degree
Idle operational limits (when parking)
Valve Timing
Aim
Delay the IN side overlap to the utmost little spitting to paragraph inhalation side you lose
When there is overlap, when overlapping the exhaust enters to inhalation side and the following combustion deteriorates
Effect
Idling revolution stability
With respect to of burning expense direction
Middle load limits (usual takeoff acceleration time)
Valve Timing
Aim
IN side is opened quickly and overlap the exhaust flows largely to paragraph inhalation side
(Inside EGR) because of this
Burning temperature decrease -> NOx decrease
The re-inhalation of HC -> HC decrease
Furthermore vacuum of the inlet pipe is eased and decreases the pumping loss when sucking
Effect
With respect to of burning expense direction
Exhaust pure characteristic
Improvement
It is light the load limits (after the accelerating, at fixed speed when travelling)
Valve Timing
Aim
Overlap it is little the paragraph
Spitting to inhalation side little you lose
Effect
Engine rpm stability
High load it is low the medium speed rotary limits (after the parking full acceleration state) (uphill road acceleration state)
Valve Timing
Aim
It makes IN valve closing timing quick, inhalation the large quantity at the point in time when it enters the IN valve closes
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Open timing of the EX valve it makes slow, receives combustion pressure sufficiently with the piston and torque improves
Effect
Engine rpm stability
High load turning at full speed limits (surpassing acceleration high revolution in the midst of highway travelling)
Valve Timing
Aim
IN valve closing timing is made slow,
Is late vis-a-vis piston speed the inhalation which
Into the cylinder it adopts
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Open timing of the EX valve it makes quick,
That the exhaust discharges from early on the piston easy to rise does
Effect
With respect to of coming out power direction
This Part now is of the Japanese toyota page.
Tempering 4 cylinder sport twin cams which were lifted, BEAMS 3s-GE DUAL VVT-i
In addition to the former inhalation valve, the DUAL VVT-i which also the control of the exhaust valve is done (Variable Valve Timing-intelligent) it loads. According to engine rpm and accelerator opening, because the computer optimizes the opening and closing timing of the inhalation and exhalation of air valve continually, inhalation and exhalation of air efficiency improves furthermore over entire area, raises output * torque. In addition, you adopt the worldwide first titanium alloy make valve for the inhalation and exhalation of air valve in 6 fast manual cars as mass production car. The valve itself being lightened substantially, polishing depends on the light response. The important point which accelerates the exciting impression of another
Linear Mode
