cylinder deactivation

[renault_megane_dci]

Any thoughts on how to feed the standard ECU with either the average of two 02 sensor or only one and opening the relevant throttle wide open (the deactivated cylinder with the not useful O2 sensor) ?

Any thoughts on having said electronic gizmo switch working cylinder on a set timing ?
(say one minute of running each to keep things hot)

Obviously this would required a set of electronic throttle bodies insted of the manual throttle bodies.

[bestclimb]

When running on both pots you could wire the O2 sensors parallel, the ECU would see an average voltage. However If the ECU uses 2 O2 channels this would be unnecessary.

have a relay between the deactivated cylinder's O2 sensor and the ECU that opens when you activate your deactivater. If 2 channel O2 another relay would close between running O2 sensor and deactivated O2 sensor input on the ECU this would/may/could/might/possibly/perhaps fool the ECU into thinking all's well.

Also then you activate your deactivator it sends power to a solenoid on the throttle for the deactivated jug.

As far as switching a flip flop and counter triggered by induction from the spark plug wires.

The suggestions made in this post are made with a level of understanding slightly above "magic crafted by robotic wizards" on how an ECU works. I don't know if the ECU would be fooled, or if the resulting amperage drop would cause the ECU to not see the working O2 sensor, or if the double amperage of two O2 sensors wired parallel would be too much for your ECU

How you going to solve the valve issue. I have visions of a solenoid in the push rod or on the lifter that shortens it.

[renault_megane_dci]

As far as throttles are concerned, I am planning on using drive by wire throttle bodies from cars (I know where to source some for cheap) so that I can have them operating separately.

I will probably need two single pressure sensor in order to balance the trottle plates on the run.

For the O2 sensor, I need to do some digging because it is not entirely clear if I can or not foul the ECU when running in single cylinder mode just by doubling the output of the O2 sensor to make the ECU happy about the amount of fuel he sends and the result he sees from the sensor.