Lockers -- What do we actually know?

[SSonnentag]

Table for visual:

Thanks for the chart. Would this seem to indicate that the dual-motor will be rear-wheel-drive while the trI-motor will be front-wheel-drive under light-load highway conditions?

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[scottf200]

Thanks for the chart. Would this seem to indicate that the dual-motor will be rear-wheel-drive while the trI-motor will be front-wheel-drive under light-load highway conditions?

My 2017 X with two induction motors still has a 'Range' mode setting. It uses the front motor in highway driving per ScanMyTesla app and CANBus reader. I would guess that front would be favored at the situation you are talking about for both. Permanent is a requirement for coming to a complete stop (one pedal driving). I don't have it but my kids TM3 does.

 

[scottf200]

Thanks for the chart. Would this seem to indicate that the dual-motor will be rear-wheel-drive while the trI-motor will be front-wheel-drive under light-load highway conditions?

My 2017 X with two induction motors still has a 'Range' mode setting. It uses the front motor in highway driving per ScanMyTesla app and CANBus reader. I would guess that front would be favored at the situation you are talking about for both. Permanent is a requirement for coming to a complete stop (one pedal driving). I don't have it but my kids TM3 does.

To follow up with more clarity. Kyle talks about the AWD Dual rear permanent being used for highway crusing and the front induction motor being shut off. The reason is the permanent motors are not able to be 'shut off' and still use some energy.

So in this chart, wherever you see the permanent for the single, dual, or tri-beast that is the highway cruiser. [Re: My TMX with both Ind. motors uses rear for "Range Mode" link]

17:00 into this video

 

[Cybertruck 1974]

To let everyone know. The AWD FS comes with lockers front and rear. The Beast comes with locker front and rear with motors working simultaneously. Done. Word from actual owner. Tesla employee is their wife that's how they got it early. Woo hoooo!!!! OFF ROAD MODE you will find it when you get your trucks!!!

 

[Dazureus]

So if the AWD has a rear motor rated at 600 HP (450 kW) and the Cyberbeast rear is rated at 845 HP (630 kW), then the AWD with the rear locker will put out more HP to the non-slipping (~600HP) wheel than the Cyberbeast (845/2 = 457.5 HP)? Is there any power loss calculation through a locked diff?

 

[Cybertruck 1974]

So if the AWD has a rear motor rated at 600 HP (450 kW) and the Cyberbeast rear is rated at 845 HP (630 kW), then the AWD with the rear locker will put out more HP to the non-slipping (~600HP) wheel than the Cyberbeast (845/2 = 457.5 HP)? Is there any power loss calculation through a locked diff?

No. It just locks drivetrain for better traction

 

[Dazureus]

No. It just locks drivetrain for better traction

So in the case of one wheel in the air or on very slippery mud, unlocked diff will cause the wheel without traction to spin with all the torque. When locked the torque is forced to be distributed evenly to both wheels regardless of traction, allowing the wheel with traction to get torque, right? So power will still be evenly distributed between both rear wheels. Tri-motor still has more power per wheel, regardless of diff locker?

 

[Cybertruck 1974]

So in the case of one wheel in the air or on very slippery mud, unlocked diff will cause the wheel without traction to spin with all the torque. When locked the torque is forced to be distributed evenly to both wheels regardless of traction, allowing the wheel with traction to get torque, right? So power will still be evenly distributed between both rear wheels. Tri-motor still has more power per wheel, regardless of diff locker?

Absolutely

 

[Dazureus]

Absolutely

Thanks. Early on, some people were saying that they prefer dual lockers over torque vectored rear motors and I'm trying to figure out why the former would be more desirable in an off-road situation.

 

[lowtek]

In theory, torque vectoring should be better ... but nothing wrong with mechanical lockers ...

 

[Cybertruck 1974]

Thanks. Early on, some people were saying that they prefer dual lockers over torque vectored rear motors and I'm trying to figure out why the former would be more desirable in an off-road situation.

1 Personally, I like lockers. And all that traction control and motor vectoring doesn't do me any good when I gotta get up a Hill over a rock through some snow and some sand at full throttle I need traction

 

[lowtek]

1 Personally, I like lockers. And all that traction control and motor vectoring doesn't do me any good when I gotta get up a Hill over a rock through some snow and some sand at full throttle I need traction

As I understand it, torque vectoring while off roading is a software differential (in the absence of a mechanical differential) that can instantly shift power to the correct wheel. The tri-motor doesn't have a differential in the rear, each motor has a dedicated half-shaft.

 

[Cybertruck 1974]

As I understand it, torque vectoring while off roading is a software differential (in the absence of a mechanical differential) that can instantly shift power to the correct wheel. The tri-motor doesn't have a differential in the rear, each motor has a dedicated half-shaft.

yep that's it. Won't find that on King Of Hammers. Can't wait to get this truck!!

 

[SSonnentag]

So if the AWD has a rear motor rated at 600 HP (450 kW) and the Cyberbeast rear is rated at 845 HP (630 kW), then the AWD with the rear locker will put out more HP to the non-slipping (~600HP) wheel than the Cyberbeast (845/2 = 457.5 HP)? Is there any power loss calculation through a locked diff?

It's OK, not everyone can be good at math and physics.

I know you're joking. If not, just play along.

 

[Cybertruck 1974]

Well, coming soon! Dang it! Another Tesla software thingy. Looks like trucks are still in development and Jan to March won't be happening for us all.

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