I’m a mechanical engineering student and I know generally how HEVs operate, but I can’t seem to find anywhere that explicitly explains how torques are “added together” to increase overall torque of the vehicle.
Is there a particular device that allows two shafts to drive one (thus adding their torques), and does that mean that both these shafts would need to have the same rotational velocity to avoid excess torsion on the driven shaft?
Any explanation would be greatly appreciated!
In: Engineering
You would just connect the outputs of the two motors together. The motors would have to rotate at the same speed or at least be geared to the same speed. In order to change gears you wolud use a clutch or torque converter just like a normal car.
This works because both electric and ICE motors can run at different speeds. So they will still work when you connect them together in sync. And in both of them the throttle will control the torque, adding more fuel to a combustion engine will increase its torque and advancing the phase of the field windings in an electric motor will do the same. As the entire driveline is connected together any torque produced by any of the motors will be distributed throughout the entire driveline so everything is at the same speed.
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