Quote:
Originally Posted by freebeard
I buckled under the pressure when it got to the first video at #11. Was it after that?
Did I mention that I confuse easily?
Siameseing two transmission casings together is a long way from tapping onto the driveshaft. Any indication (OP?) of whether the hydraulic coupling transmits power one or two ways?
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Well that video is just to give ideas as to where one might add (motor) power to a gearbox, but it does do a good job of explaining how they work and actually rely on friction not to grate.
And no; siamesing of casings isn't required.
That video simply illustrated the possibilities and that; just because there's a casing without holes/access,doesn't mean it cant be modded and sealed around a shaft etc to take power from a motor.
ie: "I don't see hole to stick the motor shaft through" isn't a good excuse!
Main Point/s:- Motor on engine: you lose out on regen because engine 'drag' and can't run pure electric.
- Motor on driveshaft: You lose out on taking advantage of the gearbox (you are lugging around anyway) that enables the use of a light, small, higher rpm = more efficient motor, and you need to find space for a big motor.
- Motor ahead of gearbox: All the advantages, except your clutch release bearing is working a lot more ( a good place for BA test) and you ancillaries aren't 'turning'.
One last thing: Possibly a wound DC rotor wins out of Permanent Magnets for overall efficiency, as it gives your motor a 'clutch' (conservation of momentum/coasting is most efficient) and enables the variation of the magnetic force which gives you a wider motor rpm range amongst other things.
They are also a hell of a lot cheaper!