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I have 2 questions:

1st: I've viewed a few different diagrams of this transmission. I don't understand how the car can be in "EV mode" with the IC-Engine OFF. What keeps the ICE from spinning backwards when its off? Or what keeps it from stalling if the MG motors apply a lot of torque?

Wouldn't the torque applied to the electric motor make the input shaft spin the opposite way?
I read that with the EV swap, you need to lock that input shaft (blue in screenshot) coming from the Engine. But with a hybrid orientation, what "locks" the input shaft in the engine? I've spun smaller engines by hand, so I know 300nm motors would definitely put some strain on it, even a V6.



2nd:Again, from this diagram it looks like the transmission gearing happens AFTER both electric motors. I don't think it's labeled in the diagram, but I think its the 2 green objects on right that look like big CVT pulleys?
I'm curious if the electric motor torque is be multiplied through the pulleys?

Sorry for my weird questions. Thanks!

viewtopic.php?t=617

https://openinverter.org/wiki/Lexus_GS450h_Drivetrain

EV mode Mg1 just spins so no torque goes through the first planetry set.

NO CVT - all gear sets are planetary. Gearing is only on MG2 not the engine or Mg1.

Pretty sure that in EV mode, MG1 spins in the opposite direction to MG2 but at an RPM where the engine input/output shaft is stationary, so 100% of the torque from MG1 is transferred to the ring gear and zero to the planetary carrier.

To do this the MG1 RPM is set to a certain percentage of the MG2 RPM (as MG2 RPM defines the rotation rate of the ring gear). No idea exactly what percentage is.

It's a mind blowing moment when you realise how this works (well, it was for me).