Regarding Tesla's regen braking

"ItalianJobR53 - now with added 'MERICA and unreliability" (italianjobr53) 10/12/2018 at 19:59 • Filed to: None

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Shouldn’t the brake lights light up when it’s regen braking? It’s quite aggressive and a S we were following did not have its brake  lights turn on. Is there a setting it something?

nj959 > ItalianJobR53 - now with added 'MERICA and unreliability 10/12/2018 at 20:08

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Is it more aggressive than engine braking in most other cars? Not trying to be sarcastic or anything, I’ve just never driven one and I’d like to know.

ItalianJobR53 - now with added 'MERICA and unreliability > nj959 10/12/2018 at 20:11

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It is, we were in a stick WRX and we had to brake while the tesla was using just the regen at 40ish mph

Tekamul > ItalianJobR53 - now with added 'MERICA and unreliability 10/12/2018 at 20:23

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It is not. I’ve driven an S, it’s not more agressive than on my Zero. And I can engine brake in my FR-S more than the r egen on the Zero.

Im guessing if you dropped the WRX into 2nd, it would've kept pace.

Urambo Tauro > ItalianJobR53 - now with added 'MERICA and unreliability 10/12/2018 at 20:23

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Wait, really? I have no experience with any car’s regen braking systems , but I heard that they we re strong enough to bring a car to a stop. Do they seriously not illuminate the brake lamps?

facw > ItalianJobR53 - now with added 'MERICA and unreliability 10/12/2018 at 20:44

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I think they should. It’s not much different than engine braking, but brake lights should really go on there as well.

Spanfeller is a twat > ItalianJobR53 - now with added 'MERICA and unreliability 10/12/2018 at 21:40

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Maybe it’s excessive. We’ve had cars and trucks engine-brake for years and they never mandated that the rear lamps turned on when it kicked in. I also wonder if regen and engine braking on their own  ever caused a severe collision.

ItalianJobR53 - now with added 'MERICA and unreliability > Tekamul 10/12/2018 at 21:41

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I wasn't driving it, it was in 3rd.

ItalianJobR53 - now with added 'MERICA and unreliability > Urambo Tauro 10/12/2018 at 21:41

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IDK either. Just posted what I saw today.

ItalianJobR53 - now with added 'MERICA and unreliability > Spanfeller is a twat 10/12/2018 at 22:25

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At least for semis you hear if its using the Jake, no warning for electric cars.

Spanfeller is a twat > ItalianJobR53 - now with added 'MERICA and unreliability 10/12/2018 at 22:28

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One of my fond memories of visiting Canada was seeing a sign on the highway saying “Residential area, please don’t use your engine brake, thank you”

Anyways... Perhaps if cars have very aggressive engine braking or regen, it could be made necessary , but I wouldn’t know where the threshold lies.

ItalianJobR53 - now with added 'MERICA and unreliability > Spanfeller is a twat 10/12/2018 at 22:35

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True, its a grey area.

Spanfeller is a twat > ItalianJobR53 - now with added 'MERICA and unreliability 10/12/2018 at 22:38

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Maybe it’s more of an issue with awareness . Maybe they could turn the way of motorcycles and make daytime lights obligatory. 

wafflesnfalafel > ItalianJobR53 - now with added 'MERICA and unreliability 10/12/2018 at 23:02

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interesting, and the WRX has a good  bit of compression braking itself just by letting off the throttle ... I smell controversy!

The Dummy Gummy > ItalianJobR53 - now with added 'MERICA and unreliability 10/12/2018 at 23:14

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Almost all the other car brands due this. I’m shocked Tesla doesn’t.

TheRealBicycleBuck > Spanfeller is a twat 10/13/2018 at 00:21

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It’s to cut down on the noise. Fairly common in the States. 

ItalianJobR53 - now with added 'MERICA and unreliability > wafflesnfalafel 10/13/2018 at 01:09

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Ikr

The Dummy Gummy > The Dummy Gummy 10/13/2018 at 01:12

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do*

brianbrannon > ItalianJobR53 - now with added 'MERICA and unreliability 10/13/2018 at 01:24

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It’s regenerative braking not regenerative coasting. Does it brake when you are coasting?  

Cé hé sin > Urambo Tauro 10/13/2018 at 05:44

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Some certainly do.

ItalianJobR53 - now with added 'MERICA and unreliability > brianbrannon 10/13/2018 at 06:21

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It certainly seemed that way, we had to brake in a WRX to slow down while the S didn't light up its brake lights.

MultiplaOrgasms > TheRealBicycleBuck 10/13/2018 at 14:47

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And very rare in E urope, where most trucks only have a retarder aka transmission brake. Engine brakes are quite uncommon over here actually, and when they do it is usually an exhaust brake and not a compression release brake. One of our Volvo tow trucks has a Jake, funnily enough.

TheRealBicycleBuck > MultiplaOrgasms 10/13/2018 at 15:40

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I meant that it was fairly common to see “No Jake Brake” signs in the U.S., but I suppose that also means that Jake Brakes are fairly common too.

MultiplaOrgasms > TheRealBicycleBuck 10/13/2018 at 16:13

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Well 35 tons on a downhill gradient are going to murder your brakes, e specially when running drums which pretty much all trucks until 1990 or so did, so you’ll appreciate the wear-free braking systems.

TheRealBicycleBuck > MultiplaOrgasms 10/13/2018 at 16:41

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The problem isn’t always on downhill gradients. I usually see the signs on relatively flat rural highways where the speed limit drops from 55+ mph down to 35 mph or less as the highway passes through a small town.

We used to live in an area where the highway was pretty flat, but it was about a mile west of a spot where the highway entered an S-curve. We could hear the Jake Brakes as the truckers slowed for the curve. We weren’t close enough for it to be loud, but I always felt bad for the people who lived near the curve.