EV-specific trailers incoming!

[FutureBoy]

Yeah, but it won’t start at a full state of charge.

Wait…
So are you saying that you charge the tri-motor. Have it tow the single motor up the mountain. Then hav the single motor tow the tri-motor down the mountain while charging the single motor using regen. Then at the bottom, the single-motor will be charged but the tri-motor will be empty. So you use the single-motor to charge the tri-motor?

Maybe I’m just too tired but I’m confused. I get that there is an over simplified joke in the situation. But I’m confused on why the driver would want to ostensibly want to do this.

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[JBee]

Wait…
So are you saying that you charge the tri-motor. Have it tow the single motor up the mountain. Then hav the single motor tow the tri-motor down the mountain while charging the single motor using regen. Then at the bottom, the single-motor will be charged but the tri-motor will be empty. So you use the single-motor to charge the tri-motor?

Maybe I’m just too tired but I’m confused. I get that there is an over simplified joke in the situation. But I’m confused on why the driver would want to ostensibly want to do this.

I lost you at tri-motor. They ain't doing that no more! ?

 

[charliemagpie]

Maybe the Quad motor will be the new Tri

And the Tri Motor will be the new Dual

And the Dual Motor will be the new Single

And the Single motor will be the F150

 

[Ogre]

Wait…
So are you saying that you charge the tri-motor. Have it tow the single motor up the mountain. Then hav the single motor tow the tri-motor down the mountain while charging the single motor using regen. Then at the bottom, the single-motor will be charged but the tri-motor will be empty. So you use the single-motor to charge the tri-motor?

Maybe I’m just too tired but I’m confused. I get that there is an over simplified joke in the situation. But I’m confused on why the driver would want to ostensibly want to do this.

This is why they added the quad motor to the lineup.

As you go up the hill, 3 motors are pushing while the 4th is regenerating. On the way down the hill, 3 are on regen and the 4th is pushing. The only tricky bit is preventing the truck from driving in circles while doing it.

 

[JBee]

This is why they added the quad motor to the lineup.

As you go up the hill, 3 motors are pushing while the 4th is regenerating. On the way down the hill, 3 are on regen and the 4th is pushing. The only tricky bit is preventing the truck from driving in circles while doing it.

That pretty much sums up your engineering expertise.

 

[SwampNut]

Does anyone know if a Tesla with a brake controller will start to apply the normal trailer brakes as soon as the brake lights come on? I think it might. Which wastes a lot of power. Wonder if it could more intelligently delay braking until you actually press the car's brake pedal?

 

[Crissa]

Does anyone know if a Tesla with a brake controller will start to apply the normal trailer brakes as soon as the brake lights come on? I think it might. Which wastes a lot of power. Wonder if it could more intelligently delay braking until you actually press the car's brake pedal?

How would it know how much braking was being applied to the trailer wheels?

-Crissa

 

[cmugler]

I tow this 700 pound eriba puck trailer with my Model 3, small but can stand up in it with the pop top, has a large bed that converts to a dinette, little kitchen with fidge, stove and sink and only get a 20% hit on range.

 

[SwampNut]

How would it know how much braking was being applied to the trailer wheels?

-Crissa

I don't think you understood what I was saying. Software *could* delay the voltage to the trailer brakes. By doing that, the car's own regeneration can capture the energy. If it applies brakes on the trailer it wastes that energy. It could be reserved for more active braking with the pedal.

Additionally, but unrelated, it could probably calculate the amount of trailer braking by using the car's deceleration rate and regeneration level. Any loss would be trailer braking. The brake controller knows how much voltage is going to the brakes, but the energy being wasted by the brakes is not known through that.

 

[Crissa]

With one-pedal driving, the brakes aren't activated. Are the trailer brakes?

-Crissa

 

[SwampNut]

With one-pedal driving, the brakes aren't activated. Are the trailer brakes?

-Crissa

That was one of my questions, and I think the answer is yes. If you installed an aftermarket brake controller on a Tesla, then yes for sure. Is the Tesla controller smarter? Dunno.

An aftermarket controller is activated when it senses a brake light, and sets the voltage to the trailer according to inertia (braking power). The connection for a trailer on a Tesla is just three wires; power, ground, and CANBUS. The data bus could instruct it to do anything, and it's also how the car gets told that there is a trailer.

 

[JBee]

One pedal driving could be dangerous with trailer sway as slowing down to fast makes it worse. Would take some getting used to.

 

[Crissa]

Does a Tesla always activate the brake light when you take your foot off the accelerator?

-Crissa

 

[SwampNut]

One pedal driving could be dangerous with trailer sway as slowing down to fast makes it worse. Would take some getting used to.

You shouldn't back off the throttle in ICE either. You should stay at neutral throttle and apply trailer brake only.

Shit...where's the trailer brake on a Tesla? In a screen? That would make it pretty useless. BUT...I know my Jeep had auto trailer sway control that applied braking automagically. Maybe Tesla too?

Does a Tesla always activate the brake light when you take your foot off the accelerator?

-Crissa

I'm not aware of any time it doesn't. I can't say I've tested it thoroughly, my experience is yes, every time.

 

[charliemagpie]

Thats interesting

I take my foot off the accelerator to slow down and sometimes I need to brake and sometimes I don't. (as we do)

I'm going to guess a Tesla also has a similar action. If it is decelerating but doesn't need to brake, why turn on the brake light ?

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