Not possible to turn off 1 pedal driving?

[rvnxyz001]

I haven't read all 12 pages of this thread, but iirc, isn't use of regen required to meet Rivian's federal EPA mileage metrics?

They make relatively aggressive regen by default. EPA uses default settings and it gets 330 miles, kind of what VW did with emission tests

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[rvnxyz001]

Rivian made a design choice not to implement blended braking on their vehicles.

isn't this "blended" breaking ?



"....what's unique for R2 is we have what we call a hydraulic brake by wire. So, the pedal when you're pressing the pedal, it's not actually connected to the hydraulic fluid during normal operation. It's sending a signal to then send to a pump to say this is how much brake pressure we want...

Instead of commanding brake pressure, we can command regen instead or a blend of the two. So we have this ability to continue to dial in what we want per drive mode..."

 

[VSG]

kind of what VW did with emission tests

Are you kidding me? You find it acceptable to accuse Rivian of a multi-billion dollar intentional criminal fraud scheme? That's not funny, it's offensive.

Rivian is following the rules strictly.

 

[Zathras]

I don't think you understand what that word means. Unless you literally do think that some of us are paid by -someone- to try to influence public opinion.



I thought it was about defining the meaning of the word "is." And "coast."

I know what it means. Sadly there are lots of volunteers. No need to pay. It just gets a bit tiring when people flit around the forums to spread the good word of Elon, or whoever.

 

[Zathras]

They make relatively aggressive regen by default. EPA uses default settings and it gets 330 miles, kind of what VW did with emission tests

Clearly no. EV drivers overwhelmingly like brake regen. The reason it helps with EPA numbers is EPA expects efficiency, and that’s what regen brings to the table.

Really, the ludicrous conspiracies people come up with to confirm their personal biases is too much.

 

[rvnxyz001]

Are you kidding me? You find it acceptable to accuse Rivian of a multi-billion dollar intentional criminal fraud scheme? That's not funny, it's offensive.

Rivian is following the rules strictly.

Come on, that’s not what I said (it was a joke) VW used hidden cheat software. I’m not accusing Rivian of anything like that.

What I’m saying is much simpler: range numbers sell EVs, so of course companies make the default drive mode the most efficient one. No issue there.

The part I don’t like is when "efficient default" turns into "you don’t get a real coast/low-regen option at all" That feels more like protecting the range story than giving drivers a choice.

And yeah, someone can always say "then don’t buy Rivian"... But that’s not really an argument. People can like a vehicle and still criticize one missing setting.

A coast/low-regen mode would take nothing away from people who love one-pedal driving. Keep strong regen as default. Hide coast mode in advanced settings. Put a giant warning on it. Whatever. Just let people choose.

 

[mkhuffman]

I'm glad that that's the case, because it makes a whole lot of sense. But why are so many people here advocating for less choice and functionality when there's less overall benefit the consumer? The people saying they're glad there's not the option are advocating for less choice, which is mind blowing to me.

Nobody is advocating for less choice. Rivian has decided that they wanted the brake pedal to control the friction brakes, which means you don't get regen by pressing the brake pedal.

Ford has brake blending. I had it in my Mach-e. Although I never really used it because I had 1PD configured at max.

isn't this "blended" breaking ?



"....what's unique for R2 is we have what we call a hydraulic brake by wire. So, the pedal when you're pressing the pedal, it's not actually connected to the hydraulic fluid during normal operation. It's sending a signal to then send to a pump to say this is how much brake pressure we want...

Instead of commanding brake pressure, we can command regen instead or a blend of the two. So we have this ability to continue to dial in what we want per drive mode..."

The Out Of Spec video also claimed there is brake blending in the R2. But other videos claim the opposite.

I think we need something official from Rivian that definitively states whether or not the R2 has brake blending. At this point it is unknown.

 

[rvnxyz001]

I think we need something official from Rivian that definitively states whether or not the R2 has brake blending.

But this is what rivian engineer said in the video: "Instead of commanding brake pressure, we can command regen instead or a blend of the two."

 

[mkhuffman]

But this is what rivian engineer said in the video: "Instead of commanding brake pressure, we can command regen instead or a blend of the two."

They "can". But do they at R2 launch? And how much?

We know nothing except what they did with the R1. Which is pure friction brakes.

 

[rvnxyz001]

They "can". But do they at R2 launch? And how much?

We know nothing except what they did with the R1. Which is pure friction brakes.

Also some info here

Rivian mentioned that the R2’s braking system is also different than the R1s in that, while pushing the R1’s brake pedal always moves hydraulic fluid, the R2’s brake pedal does not normally move fluid but instead it sends a signal to provide brake pressure (you can press harder to “push through” in the event of a failure); this, Rivian says, allows for better regen performance/variability.

https://www.theautopian.com/the-lon...h-review-of-the-rivian-r2-you-will-ever-read/

 

[Gen(R3)Xer]

If anything I wish there was a regen setting higher than high. I love one pedal driving.

Same. I want my Model 3 to have higher or adjustable regen. It used to but subsequent updates have weakened it.

 

[mkhuffman]

Also some info here



https://www.theautopian.com/the-lon...h-review-of-the-rivian-r2-you-will-ever-read/

Not official

 

[SwampNut]

Rivian should also let you order a vehicle without any seatbelts or airbags, or even ABS and those other stupid nanny controls. That is freedom of choice.

 

[Zathras]

Nobody is advocating for less choice. Rivian has decided that they wanted the brake pedal to control the friction brakes, which means you don't get regen by pressing the brake pedal.

Ford has brake blending. I had it in my Mach-e. Although I never really used it because I had 1PD configured at max.




The Out Of Spec video also claimed there is brake blending in the R2. But other videos claim the opposite.

I think we need something official from Rivian that definitively states whether or not the R2 has brake blending. At this point it is unknown.

I've watched videos with Rivian Engineers who say they are using brake by wire. Which means in normal operation there is no physical control of the brakes from the pedal. And one explanation that give me the confidence they are taking safety seriously is that if there is a failure in the brake by wire system, you can press the brake pedal and it will drive the hydraulic system to stop the car just fine.

The more I'm hearing about the backup systems that Rivian is putting into this vehicle (such as if the electric connections fail on the left side of the car, the electrical system from the right side can take over and control the left side in terms of door locks and windows), the more obvious it is to me that Rivian has put a lot of thought into how it operates.

 

[CalDriver]

After reading this thread, I still don't understand what the problem is with allowing the driver to disable regen or make it very minimal, like some other EVs do. There is absolutely no harm in this. I assume it is not like allowing CarPlay or Android Auto, which is purely a political reason. I guess there is some technical design choice that doesn't allow them to do this, even by modifying the software. Otherwise, I don't understand why they wouldn't implement it.

It comes down to wanting to maximize the EPA range. If there was a way to disable, the EPA could/would factor it in their range tests and since Rivian did not create a brake system that is capable of blended braking, using the brake pedal means regen would not be happening resulting is more energy being used for the test (since none is captured back through regen).

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