Quote:
Originally Posted by Old Mechanic
I appreciate the time you spent in your response Ian and the rational consideration you give to the subject. If you have not already seen this my Patent #7677208 (US only) was issued close to 3 years ago this March. The design started out with a decent understanding of the advantages of in wheel drives which when driven hydraulicly mean lower RPM and higher efficiency. The stroke is adjustable from the central 0 position (neutral or freewheel) to one in either direction, giving forward, neutral and reverse (regenerate) positions in individual wheels without any need for any other power modulation, or clutching function. The drives can be directly connected to the accumulator.
regards
Mech
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You're welcome ... like I said ... Progress is progress.
Nice
I wish you the best of luck in further implementation of it.
Have you in the 3 years been able to construct a working prototype of your hydraulic motor / pump design? ... If so have you yet been able to send it out for validating via 3rd party testing of the devise itself?
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My own personal concern about any in-wheel motor ... ICE, Hydraulic, electric , whatever ... is that the wheel is just about the most abusive location on the car ... shock , heat, cold, impacts, submerged in water, etc ... etc... I'll agree there are advantages ... but those pros don't come without some cons too ... the abuse is a big one for long term durability.
Locating the hydraulic motor in the wheel like that also would make it very difficult to insulate it from heat loss due to compression of the working fluid ... if you throw away the heat energy from the compression , efficiency goes down with the lost joules of heat.
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A hydraulic Hybrid might find better traction along lines similar to what HEVs did ... combine it with existing vehicle components to reduce the net vehicle impact of implementation ... for HEV it was starter and alternator merged into one HEV motor to do both... and with the added low end Electric motor torque a smaller ICE could be used , also reducing the impact of implementation.
In theory the HH could get a few electric motors can't ... the brake pump is hydraulic for example ... and one might be able to even combine it with the heat pump functions of an air conditioning system.... etc.
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The other thing to consider for a HH ... what is the incremental improvement path? ... HEV mild to full ... HEV Full to short PHEV ... short PHEV to long PHEV ... Long PHEV to BEV.... what is the incremental path for the HH? ... if it is a dead end at the HH ... it won't be as attractive for manufactures to invest heavily in it.