Off-road trip with some Rivian engineers

[SwampNut]

In other thoughts......What are these things?!?!

Hooks for things, like my cap, and water bottles with a loop. I have 3D printed stuff ALL over the truck. Also that drink holder adapter, which is a great solution for oversized and undersized drinks. PLUS holds a radio super well.

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[azbill]

Tesla employed a mechanical locker on the single motor axle drives. On the Cyberbeast, it uses a physical locker on the front, which is really the only one you can lock via the UI if i'm not mistaken, and then just motor control on the rear virtually.

Hummer also has mechanical locker on the front, virtual on the rear. You can switch on just the rear, or both. What I like about the Hummer is that all the off-road settings have switches, not touch screen. Much easier to use in off road conditions.

 

[SwampNut]

What I like about the Hummer is that all the off-road settings have switches, not touch screen. Much easier to use in off road conditions.

My experience in both Chevy and Jeep is the opposite, except for the one huge locker switch in my Jeep. Otherwise a pain in the ass to find when you need something, while the screen is far more obvious to me.

 

[godfodder0901]

I also got full answers on the question about the brake pedal moving in adaptive cruise.

Care to share the answer?

 

[SwampNut]

Care to share the answer?

Oops, oh yeah. Maybe it should go in one of those threads? But anyway, it's not really applying to brakes, it is pre-pressurizing them for instant and smoother reaction if needed. And it's only active if you have blended braking enabled on your car. I have that disabled, so that explains why I was mystified that the pedal never moves for me, and ACC won't use the brakes for me.

 

[rivianchris]

The head of the off-road engineering and some others put on a short trip and some lessons. Nothing like learning from the people who made your truck! I'll edit and post some video later, there are conversations I need to be careful with as I don't know what things they would want repeated publicly. I also got full answers on the question about the brake pedal moving in adaptive cruise.

Drone video:

Looks like a fun time! Looks like the same engineering team that joined us at King of Hammers (Optima Unplugged) earlier this year. The guy in the brownish shirt who drives the LA Silver R1S helped me get up and running after I caught a flat on one of the trail runs. Looking forward to this when they come out to CA.

 

[SwampNut]

Looks like the same engineering team that joined us at King of Hammers (Optima Unplugged) earlier this year.

At least two said they were there. My first off-roading with the Rivian was at Ocotillo Wells, with my brother, and we have driven a lot of high-dollar dedicated machines all over that place. We could not believe that the Rivian mostly blew them away (less suspension travel, but barely had a penalty). The engineer guy in the blue jumpsuit was very happy to hear all of that, he really is into his work and the results.

 

[godfodder0901]

Oops, oh yeah. Maybe it should go in one of those threads? But anyway, it's not really applying to brakes, it is pre-pressurizing them for instant and smoother reaction if needed. And it's only active if you have blended braking enabled on your car. I have that disabled, so that explains why I was mystified that the pedal never moves for me, and ACC won't use the brakes for me.

That doesn't totally jive with what I'm seeing... I don't use the brake assist either but, when slowing with HWA or ACC active, the brakes squeal. If I turn off HWA or ACC, the squeal instantly stops.

 

[srkz]

That doesn't totally jive with what I'm seeing... I don't use the brake assist either but, when slowing with HWA or ACC active, the brakes squeal. If I turn off HWA or ACC, the squeal instantly stops.

Same here. I tested this on my Gen 1 before the blended braking update existed, and the pedal still moved then too. I used to live at the top of a half mile hill that lost about 400 feet of elevation. A relatively gentle but consistent descent. I drove down it manually using regen only and my brake rotors were the same temperature at the top and the bottom as measured with an IR thermometer and my hand. Then I drove to the top and back down again except using cruise control to modulate my speed on the way down. At the bottom of the second run the brake rotors were too hot to touch, I don't remember the exact temp but they were like 150+ degrees.

If they changed how it works in an OTA then they sure never mentioned it in the notes, but it 100% did not use regen on cruise control a year ago.

 

[SwampNut]

I tested this on my Gen 1 before the blended braking update existed

We're talking about today, not then.

I'll pay more attention to it again, but every time this comes up, I'm surprised since I never notice brake movement. And the display shows lots of regen, every time.

 

[srkz]

And the display shows lots of regen, every time.

The display also shows full regen when you have brake assist turned on and the battery is at 100%, a circumstance where regen isn't actually possible and it's all mechanical braking. If the display is lying about regen when brake assist is enabled, why wouldn't it lie about regen when cruise control is enabled? I think the display is not "regen" so much as it is "deceleration provided by the vehicle rather than the driver."

 

[Glembi2]

The display also shows full regen when you have brake assist turned on and the battery is at 100%, a circumstance where regen isn't actually possible and it's all mechanical braking. If the display is lying about regen when brake assist is enabled, why wouldn't it lie about regen when cruise control is enabled? I think the display is not "regen" so much as it is "deceleration provided by the vehicle rather than the driver."

That has to be right - that the length of the green arc is tied to slowing effort, not regeneration itself.

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