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Ramcharger type Wrangler Next Gen ?

Tncdrew

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EVs are significantly less complicated than ICE vehicles.

REPB is just an EV with a gas powered generator bolted on to charge the battery.

Traditional series-parallel hybrid like 4xe is a total Rube Goldberg contraption as you have two complete drivetrains in one vehicle.
I completely understand what you're saying as I've been an auto enthusiast for 60 years. I just don't have any interest in anything other than an ice vehicle.
But to each, his own 🙂
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EVs are significantly less complicated than ICE vehicles.

REPB is just an EV with a gas powered generator bolted on to charge the battery.
No need for complex crap like turbos. No need for complex valvetrain systems that try to optimize torque over a wide RPM range. Huge chunks of engine design decisions are compromises to deal with that fundamental concern. Those compromises are no longer necessary.

But, of course, it'll sound like a f'n generator.
 
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2nd 392

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No need for complex crap like turbos. No need for complex valvetrain systems that try to optimize torque over a wide RPM range. Huge chunks of engine design decisions are compromises to deal with that fundamental concern. Those compromises are no longer necessary.

But, of course, it'll sound like a f'n generator.
Cam profile optimized for a constant likely 16-1800 rpm. TB and intake runners optimized for low rpm velocity, high rpm flow not needed, the same for head ports, runners, and valves.
Because it is a f’n generator . 😁
 

_olllllllo_

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Isn't that mechanical advantage only there to increase torque? Would that still be required if we (like the Ramcharger) had in the neighborhood of 600 lb-ft of torque, all available from 0 RPM?
Since current BEVs lose 75% of range or more when they off-road and rock crawl, I didn't know if that would help be not requiring the motor to use as much torque. It would also allow me to keep my Jeep and not start over with a build.
 

Ratbert

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Since current BEVs lose 75% of range or more when they off-road and rock crawl, I didn't know if that would help be not requiring the motor to use as much torque.
I'm no expert on electric motors, but my understanding is that they have a flat torque curve (from zero to redline) and their efficiency doesn't vary much at all between zero and redline. That is, it doesn't help to divide the motor's rotational speed by a transmission's gear ratio...assuming sufficient torque. If ours is anything like the Ramcharger it'll have 600'ish ft lb.

Adding a transmission does, however, add losses, weight, complexity, more things to break, and more things to maintain / oil.

600'ish foot pounds at zero RPMs is sufficient, right? Serious question since there won't be any multipliers like we have now.

It would also allow me to keep my Jeep and not start over with a build.
You'll be starting over if you buy any new rig. Additionally, if you wait until 2028 it's extremely unlikely that significant JL parts will be compatible with the J70 platform...just like going from a JK to a JL.
 

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mwilk012

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Cam profile optimized for a constant likely 16-1800 rpm. TB and intake runners optimized for low rpm velocity, high rpm flow not needed, the same for head ports, runners, and valves.
Because it is a f’n generator . 😁
You guys know the Pacifica Hybrid already exists, right?
 

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What does a hybrid have to do with any of this? We're not talking about a hybrid.
Of course you are. “Range extender” EV’s with a gas generator are exactly as complex as a traditional hybrid.
The PacHy uses a variation of the 3.6 that operates on an Atkinson cycle, and primarily focuses on charging the battery.

The only equipment difference between the uncoupled and coupled variations would be a few gear sets.
 

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Of course you are. “Range extender” EV’s with a gas generator are exactly as complex as a traditional hybrid.
The PacHy uses a variation of the 3.6 that operates on an Atkinson cycle, and primarily focuses on charging the battery.

The only equipment difference between the uncoupled and coupled variations would be a few gear sets.
The design of the two concepts is massively different, but I'm guessing you're just here to argue about it. Maybe you even have a Pacifica Hybrid.
 

mwilk012

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The design of the two concepts is massively different, but I'm guessing you're just here to argue about it. Maybe you even have a Pacifica Hybrid.
I do. I’m very familiar with its internal workings. It helps if you would be specific about what you believe to be different.

“A generator” is not specific. It requires a complete gas or diesel engine with all of the same emissions crap a traditional ICE vehicle would have. It requires a high voltage battery the same as a EV or hybrid. It requires an inverter to power the low voltage control systems. The efficiency can be tweaked better by having it removed from the driveline entirely, certainly. That’s not a major design difference.
 

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Of course you are. “Range extender” EV’s with a gas generator are exactly as complex as a traditional hybrid.
No.

The PacHy uses a variation of the 3.6 that operates on an Atkinson cycle, and primarily focuses on charging the battery.
Sort of. It uses variable valve timing to mimic a shorter compression stroke and longer power stroke like an Atkinson Cycle engine achieves with different connecting rod lengths. But not really the same thing.

The only equipment difference between the uncoupled and coupled variations would be a few gear sets.
There's a lot of complexity in those "few gear sets" and the need to couple/uncouple the two powerplants from the drivetrain.
 

Tncdrew

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Can you imagine pulling up to stop light, 10-15 vehicles deep in two to three lanes, with half of all of them revving away at 16-1800rpm charging batteries..... 🙄
Lovely
 

mwilk012

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There's a lot of complexity in those "few gear sets" and the need to couple/uncouple the two powerplants from the drivetrain.
Not really, not compared to the electronic control systems responsible for managing all of this seamlessly functioning together. Hybrids work very well. I haven't heard a great argument yet as to why the Prius drivetrain is any more complex than the theroretical range extender you guys seem to be drooling over. What is it about disconnecting two shafts that makes it so superior?

Sort of. It uses variable valve timing to mimic a shorter compression stroke and longer power stroke like an Atkinson Cycle engine achieves with different connecting rod lengths. But not really the same thing.
The Atkinson engine was never used for anything, and yet the "Atkinson Cycle" remains the name. It has never used his ridiculous crankshaft for any production machine. The argument on the name is unnecessary and going nowhere.
 

mwilk012

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Can you imagine pulling up to stop light, 10-15 vehicles deep in two to three lanes, with half of all of them revving away at 16-1800rpm charging batteries..... 🙄
Lovely
Except, you know, they don't do that.
 
 







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