Diby2000
New Member
In an earlier post, responding to @patdam I was conflating manual transmission as a gearbox (pinion or manual transmission in a car). Maybe not what was being asked. I now believe he was talking about derailleur transmission. My bad.
My thoughts are still that the e-cvt may be benifical here also as mentioned, the existing motor systems already have planetary and or belt speed reduction that is already contributing to some efficiency losses, here they could be the same or even less depending on which part of the planetary is being driven by the motor. The toyota e-cvt confguration is not the only possible configuration available. It has its own design constraints, such as an internal combustion engine that can only spin at a limited rpm, and in only 1 direction. I suggest that the 2 electric motors could drive the internal gears of the planetary (sun and planets) which will inherently provide significant reduction to the system.
Also, I can't remember which thread I mentioned this earlier, but the addition of a 2nd motor does not necessarily mean a loss of efficiency. It verry well could, and probably will/has is early generations of design, but these 2 motors are not both 1500w each, they will possibly be around 1000w and 500w. Remember the torque/power is added/multiplied through the gearing.
My thoughts are still that the e-cvt may be benifical here also as mentioned, the existing motor systems already have planetary and or belt speed reduction that is already contributing to some efficiency losses, here they could be the same or even less depending on which part of the planetary is being driven by the motor. The toyota e-cvt confguration is not the only possible configuration available. It has its own design constraints, such as an internal combustion engine that can only spin at a limited rpm, and in only 1 direction. I suggest that the 2 electric motors could drive the internal gears of the planetary (sun and planets) which will inherently provide significant reduction to the system.
Also, I can't remember which thread I mentioned this earlier, but the addition of a 2nd motor does not necessarily mean a loss of efficiency. It verry well could, and probably will/has is early generations of design, but these 2 motors are not both 1500w each, they will possibly be around 1000w and 500w. Remember the torque/power is added/multiplied through the gearing.
