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To me the key element is that it can run different transmission ratios: wether that's in discrete steps or a continuous ramp, that's an implementation detail. B
by usrusr 2y ago
To me the key element is that it can run different transmission ratios: wether that's in discrete steps or a continuous ramp, that's an implementation detail. BEV (most of them) don't have that, the Prius has. When I read GP post my (surprised) impression from the "no gearbox" claim was that the Prius started as a serial hybrid. (it did not)
- numpad0 2y agoIs THS actually capable of varying transmission ratio? I thought it can modulate resistance but not actually change gear ratio.
- jgilias 2y agoTransmission ratio yes, as in, what part of engine power gets transmitted to the wheels. Individual gear ratios of course not.
- numpad0 2y agoSo the relationship between engine RPM and wheel RPM is always fixed, only torque split is varied, right? I think that's around where some confusions are coming from.
- jgilias 2y agoNo, the engine can spin without the wheels spinning. Then MG1 gets spun and charges the battery (or spins freely if the battery is full). This page has a neat PSD simulation to help grok what happens: http://eahart.com/prius/psd/ http://eahart.com/prius/psd/ I think it only works from a computer though!