20V VVT on standalone ECU

[jondee86]

See if you can find these under the "Additional Maps" tab in the Emerald
software. If you have the tables, you should be able to implement VVT
control of some kind.


Cam on/ off switching control. Switch according to rpm and load.
Any spare output can be assigned to this function.


Rover VVC control.
Continuously variable cam duration.
Control target duration according to load and speed table.
Oil temperature correction to control algorithm.

The VVT switch is a simple rpm/load on/off setup controlled by the ECU.

The VVT control is a more sophisticated system, modulating the VVT
solenoid according to rpm/load, and requires both crank and cam sensors
to allow the ECU to monitor the degrees of cam advance or retard. I did
not find any reference to this in the documentation, so I don't know if this
runs in closed or open loop... open loop I would guess.

Cheers... jondee86

PS: With Toyota 20V engines, I believe that (@ WOT) there is an optimum
lower rpm for turning the VVT on, and above a certain higher rpm it
should be turned off, for best performance. Maybe that's all you need, and
you could possibly use the A/C enable output ?? Talk to Emerald