Why 2 or 3 motors and what motors?
I wouldnt think i would be able to get the towing power i need from a single motor would i? I havent chosen a motor yetWhy 2 or 3 motors and what motors?
In my post i talk about my plans involving building a solar powered camper with a large battery backup system, so im assuming thats going to be pretty heavy. I dont have anything picked out yet, as I am just in the starting phase.Towing power for what? You move houses for a living where you need three motors?
What are you towing (incl weight)?
All AWD production EVs use at least two motors, simply to have at least one at each axle; this avoids a shaft down the length of the vehicle, and avoids a differential between axles. A few EVs (and hybrids) use two motors at one axle - a single motor per wheel - mostly to allow them to independently control the torque applied to each wheel, partially to avoid the axle differential, and perhaps to get twice as much power using available motors and inverters.is 2 or 3 motors a lot? the few swaps ive seen for these always have dual motors. and tesla uses dual and tri motor configurations in all vehicles. I just figured i needed that many for this plan.
Yeah I understand that. There's going to be a lot of other work done to the jeep increasing the weight of it.In my experience, towing more than 2x or 3x the truck weight is asking for trouble. I doubt your little sawed off Jeep was ever rated to tow more than 7000lb. As soon as you hit 2x, things can get squirelly pretty fast in curves going down steep grades with trailer push.
You're right I clearly haven't as I stated before that I haven't done any of the calculations on the camper yet. I was using the weight of the mid-size and the large airstream models as a basis for the weight.You clearly havent done the math on your solar powered camper. A set of foldout panels means next to no battery at all. LED lighting means you use maybe 40W of light for 8 hours...that's 0.33kWhr of battery...one Tesla module has you in lighting for 17 days...55lb. That's with zero solar. A PTC would nominally run 2kW for 12 hrs at night. That's 300lb of battery
I don't think I will be able to get a camper in the size that I want / need at that low of a weight unfortunatelyGet the tow weight goal to a max of 4,000lb and target 3,000lb. Being sloppy with mass has no place if there's an EV in the equation.
My plan was to completely remove pretty much all of the components from the original Jeep including the straight axles and do independent suspension for each wheel. I figured that way I would have the room from the engine bay and transmission tunnel to mount a dual motor system.In the Cherokee, do you intend to keep the beam axles front and rear, or are you planning (or willing) to replace that with independent suspension at front, or both? If you still have an original beam axle you can only drive it with one motor, so with both original beam axles you have two motors at most. Motors mounted on beam axles are possible, and would certainly work, but are not desirable in car or SUV. A beam axle with two separate inputs (pinion shafts) to connect two frame-mounted motor to one axle would be interesting, but custom, strange, and not worthwhile.
Then you're probably pushing the design limits of the XJ for towing what you want. This isn't an EV problem in this case unfortunately. You have to take into account the other limitations of the vehicle for towing beyond powertrain.I don't think I will be able to get a camper in the size that I want / need at that low of a weight unfortunately
What are the other limitations?Then you're probably pushing the design limits of the XJ for towing what you want. This isn't an EV problem in this case unfortunately. You have to take into account the other limitations of the vehicle for towing beyond powertrain.
So as far as frame strength and relative weight of the vehicle these are things that I had already kind of considered when I was trying to determine which route I was going to go as far as engine swap (I considered diesel and gas and more recently decided on electric)Braking, frame strength for the hitch, relative weight of the towing vehicle vs the trailer (The XJ is nice and light), strength of all the drive-line components under load. Keeping any fluids in the driveline cool, which is a little easier in the EV. Presumably you'll have trailer brakes as well. Sure I'm missing a couple things...
Thanks I'll have to check that out.
Ah, so you intended to build a custom truck, and set a Cherokee body on top of it. That's very different from converting a Cherokee, although the Cherokee body limits the truck to a size which is too small to reasonably tow several tons, on the basis of stability....
With the Jeep being a unibody I was going to get a donor frame mounted underneath ...
And so I've just got the body basically that I'm keeping and I'm going to be changing out everything else and upgrading and beefing up.
So you're thinking the length of the XJ even if stabilized is still too short to be able to efficiently tow a camper of any reasonable size.Ah, so you intended to build a custom truck, and set a Cherokee body on top of it. That's very different from converting a Cherokee, although the Cherokee body limits the truck to a size which is too small to reasonably tow several tons, on the basis of stability.
Also the extent of how much of that extra stuff I do was depending on how much I needed to do like if I don't have to do that stuff I'm not going toAh, so you intended to build a custom truck, and set a Cherokee body on top of it. That's very different from converting a Cherokee, although the Cherokee body limits the truck to a size which is too small to reasonably tow several tons, on the basis of stability.
In the UK the 4.0 Auto XJ is rated for 3250kg which is 7165Ib's7000lb is doable, the Trailhawk trim XJs were rated for 7200, automatics in other trims 5000lb. But yeah, I wouldn't do it. I towed 4500 through the rockies in my 98 manual and it was... fine, but didn't love the downhill curves.
|Jeep Cherokee (1993 - 2001) 4.0 Classic 5d Auto|