Gravity specs we'd like to know

[Bobby]

what do you mean neither WILL. Has Lucid said they don't plan to implement blended regen?

Yes.

 

[momo3605]

Yes.

Huh i guess I missed the memo. That's unfortunate...do you have a source?

 

[joec]

Huh i guess I missed the memo. That's unfortunate...do you have a source?

I seem to remember one of the recent Gravity videos. Perhaps Out of Spec? The Lucid rep said they feel blended regen just doesn't feel right compared to a direct connection on the brake pedal, or some such. I was barely paying attention while watching it.

 

[momo3605]

Perhaps Out of Spec?

oh gosh...im definitely not fishing through that hour long video a second time . I'll take your word for it

 

[Knucklehead]

oh gosh...im definitely not fishing through that hour long video a second time . I'll take your word for it

It was either in the OOS first drive video, or the MotorTrend first drive video. I think it was OOS.

The engineer in the passenger seat was asked about blended braking, and he said they have yet to see any vehicle implement it well enough for Lucid. They want the driver to have a very good feel for slowing the car, and when the brakes are pressed, only friction is applied. It seems to be related to their performance driving DNA. Until blended braking that works as well as friction braking is possible, they will not do it. And as of today, it is not possible. In their opinion.

I have never had an issue with blended braking in my Mach-e, but I rarely use the brakes. If I drove in 2PD mode, I might have a complaint. But I drive in 1PD mode, and only use the brakes when 1PD isn't slowing fast enough. I really cannot tell when regen ends and friction brakes begin, but that is just me and the way I drive.

I do understand the logic behind Lucid's approach.

If you drive using 1PD, it won't matter anyway as you will rarely use the brakes.

 

[momo3605]

The engineer in the passenger seat was asked about blended braking, and he said they have yet to see any vehicle implement it well enough for Lucid. They want the driver to have a very good feel for slowing the car, and when the brakes are pressed, only friction is applied. It seems to be related to their performance driving DNA. Until blended braking that works as well as friction braking is possible, they will not do it. And as of today, it is not possible. In their opinion.

Maybe we're talking about different things, and I might be using the wrong terminology. I'm just talking about when you fill your battery to 80%-100% then you drive off, let off the throttle when coming to a stop and having that oh crap! moment when there is no regen lol

I think what you're describing is systems that when you push the brake, initiate regen instead of physical brakes. For that yes, I agree, there is a bit of artificialness to the pedal feel in most cars that do that.

 

[Knucklehead]

I'm confused...blended braking does not replace friction brakes. It should replace regen. There's no "artificial" feel from just slowing down. You're not pressing the brakes.

Maybe we're talking about different things. I'm just talking about when you fill your battery to 80%-100% then you drive off, let off the throttle when coming to a stop and having that oh crap! moment when there is no regen lol

When you press the brake pedal in a blended brake vehicle, more regen is applied instead of friction. When the regen is not enough to slow the car based on driver pedal input, friction is added to the regen. That transition from regen to friction is noticeable, and annoying to performance drivers. The transition is often not very good. In Lucid's opinion, it is not possible to manage the transition well enough, and pure friction gives the driver the best feel for how the car is stopping.

I cannot argue with them, because as I said, I use 1PD and almost never use the brake pedal.

 

[joec]

Maybe we're talking about different things, and I might be using the wrong terminology. I'm just talking about when you fill your battery to 80%-100% then you drive off, let off the throttle when coming to a stop and having that oh crap! moment when there is no regen lol

I think what you're describing is systems that when you push the brake, initiate regen instead of physical brakes. For that yes, I agree, there is a bit of artificialness to the pedal feel in most cars that do that.

I'm not sure about this scenario. But I would imagine if they are going to "programmatically" apply the brakes, that would mean the brake pedal is talking to a computer, not directly connected to the brakes anymore. Since letting off the accelerator would also have to control the braking system.

 

[joec]

You're inserting a middle man between the pedal and the brakes, in other words. Regardless of when you are braking via pedal or letting off the accelerator.

 

[momo3605]

I'm not sure about this scenario. But I would imagine if they are going to "programmatically" apply the brakes, that would mean the brake pedal is talking to a computer, not directly connected to the brakes anymore. Since letting off the accelerator would also have to control the braking system.

My bad. I got confused. I think what @knuclehead and @Bobby were referring to is actually what is called blended braking and I'm not surprised Lucid doesn't want to implement it for the reasons stated.

You're inserting a middle man between the pedal and the brakes, in other words. Regardless of when you are braking via pedal or letting off the accelerator.

It's not that big of a deal...other OEMs have been doing this for a few years already. It's just a safety feature. From Rivian's release notes...

 

[DrZorro]

I'd also like to know if it has a *real* SiriusXM satellite antenna rather than using cellular data.

 

[Knucklehead]

My bad. I got confused. I think what @knuclehead and @Bobby were referring to is actually what is called blended braking and I'm not surprised Lucid doesn't want to implement it for the reasons stated.



It's not that big of a deal...other OEMs have been doing this for a few years already. It's just a safety feature. From Rivian's release notes...

View attachment 25625

I am pretty sure that is not blended braking. My understanding has always been that the Rivian R1 uses friction brakes only, just like Lucid.

The note you posted is referring to 1PD, and when you lift your foot off the go-pedal, you expect a consistent slowing response. If the vehicle is at a high SoH, or is too cold to provide good regen, Rivian uses friction brakes along with regen to keep the 1PD response the same regardless.

I think my Mach-e must be doing the same thing, because I never notice a difference in 1PD whether the car is at 100% SoC, or it is 0F outside. It slows the same every time I lift my foot off the go-pedal.

 

[segbrk]

I'm not sure about this scenario. But I would imagine if they are going to "programmatically" apply the brakes, that would mean the brake pedal is talking to a computer, not directly connected to the brakes anymore. Since letting off the accelerator would also have to control the braking system.

Not necessarily. The computer can already control the friction brakes, as HA and the emergency braking systems already do it. And in doing so, they physically move the brake pedal as well, because the brake pedal is indeed physically connected to the braking system. There's just a computerized mechanism in there too. I also want this.

 

[tmichael]

There are several specific things I'd like to understand about Gravity that should eventually be on Lucid's Gravity configurator website. Of course, I have many other more nebulous questions, like when could I get one, what state will the software be in, etc. But these won't be answerable by anyone until shortly before they happen.

1) EPA range on the three wheel/tire combos
2) Max charging power on Tesla v3 stalls
3) Min-max ground clearance with and without the Dynamic Handling Package

Your concrete / specific questions?

By configuring the various wheel/tire combos on the configurator, the EPA numbers show up real-time as you choose. Sorry, no info on the rest

 

[flarbear]

Has anyone mentioned "whether there will be a cargo cover"? It may be useful for 7 seat configuration if you leave the 3rd row stowed all the time, but it will definitely be useful for the 2 row configuration.