Quote:
Originally Posted by Tweety
And since hydraulic fluid has no mass it doesn't effect efficiency like the weight of the battery?
And no, I'm not talking about the weight you save or nullify by removing components made redundant by the hydraulic transmission system... I'm talking about the accumulator tank... It's probably atleast similar in weight to a superconductor? and since that does the exact same thing in this instance, regen brake feeding it to use it for take off and acceleration... I'm not going to quote figures but in a pure EV I think the numbers are fairly close as to the 20% from the traction pack vs superconductor...
Why would the electric car apply the same torque to both (all) wheels if it where using wheel motors with a decent controller?
An traditional ICE would... And a EV converted from an ICE would... But there is no reason a pure EV would...
You keep comparing to a traditional ICE car... The HH or B-EV will both beat that, that's mostly a given... I'm trying to ask you why you couldn't use an electric motor to create the pressure needed for the HH ?
If the INNAS is efficent enough to only use the ICE on 12% of the test cycle, and a very small one is sufficient, why not replace it with an electric motor? Stick an decent sized battery in there and it should be getting the same range as the ICE version? since now the battery is only used 12% of the time...
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What you decide to talk about is your choice. You don't write the rules for my choice. Components replaced by a HH powertrain are a critical consideration in any cost analysis basis for comparison. Less complicated powertrain systems are the opposite of hybrids available today, and inexpensive solutions to hybrid applications are a real factor whether you choose to accept that fact or ignore it.
I have a Nissan shop manual for a 1981 model. Would you like to see the pages that consititute 1/3 of the whole content of the manual that are non existant on a HH, or would you like to add serveral hundred additional parts in your hybrid electric vehicle?
Try reading my prior posts. I clearly stated that it did not matter what consumable energy source you utilized.
All it has to do is recharge the accumulator. That can be done with a battery and electric motor, a steam engine with a pan of coal heating the boiler, an IC gas or diesel engine, a microturbine, a natural gas engine, or any other source you desire that consumes a replenishable fuel.
Already said that earlier, but I guess it requires repeating. I won't use the I word again as long as you keep the responses civilized.
The HH wins in regeneration and reapplication, by a margin of over 100% increase in efficiency.
Without any storage whatsoever the IVT (Infinitely Variable Transmission) feature allows you to optimise engine efficiency. The accumulator storage allows you to maintain engine operation at only best BSFC levels, regardless of the engine-motor-fuel-battery choice.
The accumulator which (as previously stated) could also serve the purpose of a structural component of the vehicle.
Can your battery or superconductor be the frame of your vehicle (whether it is uni body or separate frame construction)?
NO
Can your battery or superconductor regenerate enough energy to recover 80% of a single stop-start cycle, down to 0 wheel speed.
NO
Unless you have a monster of an electric motor.
Do the batteries and or superconductors exist, and are they available for purchase in a vehicle that could be commercially produced for $15,000.
Probably not for at least another 20 years.
Why all wheel drive?
Because that is the source of regenerative energy. Any wheel or number of wheels can be instantly disconnected by going to 0 stroke on that individual wheel drive.
Traction control and ABS are easily incorporated by dumping some of the pressure necessary to maintain any stroke position, unlike conventional ABS and traction control systems that use friction brakes to maintain traction, which is a total waste of energy.
In your BEV you still need friction brakes, not necessary with a HH.
What BEV is available today for $15k without a battery or superconductor.
What happens to your 400 pound battery or your superconductor in a very serious collision?
regards
Mech