Audi e-tron Regenerative Braking Claim

Scott from Claremont Manager Posted   Latest  

I’ve been driving an electrified vehicle for the past 5+ years and agree that regen can work to your advantage. However, I’ve been a passenger in the same type vehicle and found that using regen isn’t a common practice. I’ve also seen Nissan’s commercial that talks about 1 pedal operation as this article mentions as well. As for the tech breakthrough supporting Audi’s claim, perhaps someone with insight can chime in (Steve Caruso)? Fyi, we will have member mentions available here soon.

twitter​.​com/ElectrekCo/sta…

I also like the use of side view cameras, I suspect that this was used to reduce cd?

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Uwe from Goleta

 

Owner
 

I haven't had the pleasure to drive the newest fully electric etron, But I am driving the predecessor, an A3 Etron, and use regen braking all the time. It takes some getting used to, but not only is it braking before a traffic light or stop sign by itself, just take the foot from the gas, it also recharges the battery. On a distance of about 10 miles of 80% highway I get about 2 miles electric driving back. pretty cool.

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Scott from Claremont

 

Manager
 

Hi Uwe,

Does your vehicle allow you to modify the aggressiveness of the regen?

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Uwe from Goleta

 

Owner
 

yes, i have paddles at the steering wheel.

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Steve from Irvine

 

Instructor
 

Yes it does, but it does not regen as fast as I like. In all fairness, our hybrid augments the ICE. 

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Steve from Irvine

 

Instructor
 

Scott 

That is the 2019 etron press release article. Funny how the press gets the pre-production vehicles before we do. I should be getting one into the vehicles in LC in about 2 months. The word has it, that our products will continue to live up the Audi standards of performance. 

The new electrified R8 super car will be unveiled in a few weeks, look for a ton of innovations. The buzz is that we can recharge up to 80% in 15 minutes, not sure of the charging station or the adapter.

Our older etrons were a performance hybrid that was unlike any hybrid I drove. 

Hope this helps,

Steve

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Michael from Champaign

 

Diagnostician
 

We have had regenerative braking on our New Flyer Buses when we got our first Hybrids. It is a pretty nice feature. Definitely reduces wear on our foundation brakes. We have two types of Hybrids that have this feature. Allison and BAE.

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Steven from Spokane

 

Mechanic
 

I drove a first generation Nissan Leaf for about 3 1/2 years, as my daily driver. I often thought about the regen, and in my mind, I don't think the battery can recharge much in the short amount of time that you brake when you come to a stop.

I think of it like this, most of the time you are driving steady state, and every once in a while you have to come to a stop, but stopping takes like less than a minute. Charging the battery can take a couple hours, unless you are using a "super" fast charger. You can't recover much energy and get it into the battery in just a few seconds of braking.

Maybe Audi's claims are true. The new developments in electric vehicles changes rapidly. But just like they all exaggerate the range you will get with a full charge, I'd bet Audi is exaggerating on this claim as well. Either that or 30% of their driving was down hill, and no uphill driving ;-)

By the way, my Nissan Leaf wouldn't use the regen to charge the battery if the battery pack was cold, like in the winter time. Around 70 degrees Fahrenheit or higher is where it would regen the most. I've heard that the formula 1 electric car teams (Formula E, I think it's called), will heat their batteries to like 100 degrees Fahrenheit to get the most out of them. I'd have to Google that to verify though.

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Steven from Spokane

 

Mechanic
 

I just read the article that was linked in that tweet. I see that Audi is also claiming to be the first to use an electrohydraulic brake that's used in conjunction with their regen. I haven't seen their specific design, but the Nissan Leaf uses that type of brake (instead of using a vacuum brake booster) and it implements that with the regen depending on braking needs, so that claim sounds incorrect as well.

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