Parallel Hybrids

[freebeard]

More efficient gearbox and driveline, I think computer controlled sliding mesh is doable, not too much of a reach, far simpler mechanically, and more efficient.

Replace the shift rods or cables with electric solenoids, the shifter with some paddle switches and put an Aurdino micro-controller in between. Suddenly it's a software problem.

Now back to your regularly scheduled kerfluffle.

[TheEnemy]

Originally Posted by freebeard

Replace the shift rods or cables with electric solenoids, the shifter with some paddle switches and put an Aurdino micro-controller in between. Suddenly it's a software problem.

Now back to your regularly scheduled kerfluffle.

At least thats what the hardware guys will say. :P

[RustyLugNut]

Originally Posted by freebeard

That's the essence of my cunning plot: get someone else to do the work.

The theory is based on drag coefficient more than BSFC. The original Beetle is 0.41 and the Prius body is 0.26. That's 5/8ths of half of the total drag.

The challenge would not disallow crank-fired electronic ignition and fuel injection. I had trouble finding drivetrain weights when I wrote that. (100lb for the Prius battery? 400lb total?). To keep things simple it could be frontwheel drive


I was just trying to prompt some vigorous discussion.

. . . in a perverse sort of way! You have almost convinced me to try my hand at it!

[NeilBlanchard]

As the original poster of this thread, I'd like to point out that we have no "pure" parallel hybrids - though we have several that are close: the Honda Insight (old and new) and the Civic hybrid have a parallel engine and motor - but they don't use the electric motor alone, and the battery is not charged with a plug. So they are considered "mild" hybrids, as they don't take full advantage of the significantly higher efficiency of the electric motor; as it is about 3X more efficient.

The VW XL1 is much closer to a "pure" parallel hybrid - it only bends the definition because it can charge the battery with the diesel engine in a particular situation.

So, any discussions should reference actual parallel hybrids.

[cRiPpLe_rOoStEr]

Not even the Chevy Volt is a pure parallel hybrid, and I might confess I got quite surprised when I figured it out...

[P-hack]

Originally Posted by NeilBlanchard

So, any discussions should reference actual parallel hybrids.

The rules MUST be the same for series. But the closest comparison noted so far was the edison 2 which reported 100-120 mpg as a gas car (with an alternator and starting battery) vs a generator in the trunk of the electric model reporting 44 mpg on the road (1500 lb car that takes 5 hp at cruise, do the math).

And electric motors only seem efficient by comparison because they burned all the coal already in charging the battery, if you looked at the efficiency from the coals perspective (like the fuels perspective) it would be an entirely different story. The abstracting of the energy source leads to some lazy thinking, be it a power plant or a generator.

[IamIan]

Originally Posted by P-hack

You are here, waiting for my approval/permission/whatever

Already pointed out this error the last time you incorrectly claimed it ... At no point has your approval or permission been requested ... repetition of this error does not make it any less incorrect.

I offered you a deal.

Option A:
If you agree to the 3 terms I set forth ... then I will walk you through it again step by step.

Option B:
If you will not agree ... as you have refused to do so , so far ... than I will not waste my time walking you through it again.

I think my 3 terms are fair and reasonable.

Originally Posted by IamIan

#1> You will read through 100% of it.

#2> If there are any parts of it you do not understand ... I'm not psychic ... you have the burden to explain what specific part you need additional explanation of... not general repeats of your opinion ... be specific.

#3> If you disagree with a piece of evidence itself , that I reference ... you will explain specifically why you disagree ... and give a counter reference ( of equal credibility ) to evidence supporting your disagreement ... your opinion of disagreement is inadequate to opposed referenced evidence... this applies to the evidence itself ... my use of any evidence I present falls under #2 above.

Originally Posted by P-hack

Here are my assumptions

I have previously addressed all of these assumptions of yours ... and other points as well ... if you want me to go through it again step by step ... all you have to do is Option A and agree to the terms of the deal I offered you.

Originally Posted by P-hack

Are you in a position to list your assumptions at least?

Yes ... I am well aware of and have previously explained my position and the basis and evidence for it.

If you want me to walk you through it again step by step ... all you have to do ... is option A ... agree to the terms of the deal I offered you ... and I will.

[IamIan]

Originally Posted by NeilBlanchard

As the original poster of this thread, I'd like to point out that we have no "pure" parallel hybrids - though we have several that are close: the Honda Insight (old and new) and the Civic hybrid have a parallel engine and motor - but they don't use the electric motor alone, and the battery is not charged with a plug. So they are considered "mild" hybrids, as they don't take full advantage of the significantly higher efficiency of the electric motor; as it is about 3X more efficient.

The VW XL1 is much closer to a "pure" parallel hybrid - it only bends the definition because it can charge the battery with the diesel engine in a particular situation.

So, any discussions should reference actual parallel hybrids.

I think one issue that doesn't help ... is that the terms Series and Parallel are often used for cars differently than everyone else in the world uses those terms.

Series:
For electronics is: A then B then C ... etc.... disconnect between them has no effect on it being series.

Mathematics uses the same type of definition for the term series.

so does Base Ball ... or a the english language 'a series of events' ... etc.

Many times people talking about Series for a vehicle don't use the word this same way.

[IamIan]

Originally Posted by P-hack

And electric motors only seem efficient by comparison because they burned all the coal already in charging the battery, if you looked at the efficiency from the coals perspective (like the fuels perspective) it would be an entirely different story. The abstracting of the energy source leads to some lazy thinking, be it a power plant or a generator.

And Coal is just horribly low efficient solar energy path.

If you want to track it back ... a Solar BEV wins the complete cycle energy efficiency by a large margin.

[P-hack]

well biodiesel is in it's infancy as are other "solar to something besides electricity, hopefully with much beter energy density" options too, but thinking electricity is "pure" is part of the problem, the sort of religious aspect of electric at times. So comparing an electric motor efficiency to a liquid fueled motor borders on pointless.

But use a liqud (or coal, or biomas I don't care) powered generator to drive an EV and we have a basis for comparison, i.e. how well could that fuel move the vehicle without the generator/converter/controller/motor in the way?