Prius Touring Club
- 13 Sept. 2010
- Score de réaction
- Kehl (à coté de Strasbourg, côté allemand du Rhin)
- Ford Mondeo Hybride
Is this the hybrid system Toyota’s customers are looking for?
The new design uses 2 (or optionally 3) clutches to support the original Prius EVT mode plus a higher-speed EVT mode and a dual motor EV mode intended for a “vehicle such as a plug-in hybrid vehicle, which is frequently placed in an EV drive mode”.
This design achieves an additive dual motor EV mode by preventing the gas engine from spinning backwards, by engaging a clutch to connect the engine on the first planetary gear set to the planet carrier on the second gear set and then engaging a clutch brake to ground that carrier to the transmission case.
It also includes an EVT mode to improve efficiency at higher vehicle speeds.
This design ties the output of its two planetary gear sets together and to the wheels, using the ring gears for that purpose. It ties its electric motors to the Sun gears. That leaves the remaining gear on the first planetary gear set for the gas engine. For the remaining gear on the second planetary gear set, the design includes a clutch that can brake that gear to the transmission case and another clutch that can connect that gear to the same gear as the gas engine onto the first planetary set.
There are other various details to be pondered. This design does not gain a single fixed ratio gear. Toyota also says that a one-way clutch might be added in parallel to the clutch brake on the planetary carrier of the second planetary gear set.
For the remaining gear on the second planetary gear set, the design includes a clutch that can brake that gear to the transmission case and another clutch that can connect that gear to the same gear as the gas engine onto the first planetary set.
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Il me semble qu'il y a un << one way clutch >> sur toutes les prius sur volant moteur thermique;....