Recirculated air mode

Kev314 · 10-20-2015, 09:06 PM

The recirculated air control has a mode where, quoting the manual, "...a sensor detects pollutants in the outside Air and controls the shutoff automatically."

How does it detect pollutants? Possibly a photocell which detects small particles?

jd_perspective · 10-20-2015, 09:22 PM

would love to see peoples responses. i get mad when driving past the garbage dump when driving to south florida and i still smell it. shouldn't the car shut the smells out?? usually it's good though. i have to say i used to smell things like cigarette smoke a lot with prior cars. now i never smell it with the windows up and my car is always on automatic ac recirculate

adhrp · 10-20-2015, 10:41 PM

Not sure about smells, but it works pretty well for particulate matter such as smoke. I have noticed it a few times when vehicles discharged plumes of black smoke and I didn't smell it in the cabin.

DDD31 · 10-20-2015, 10:45 PM

Simple, the nasal ranger

HighlandPete · 10-21-2015, 03:04 AM

Has a 'sniffer' sensor. There is a range of pollutants that it senses. I'm sure I've got the data somewhere on file, I'll see if I can find the list when I've a few spare minutes.

HighlandPete

HighlandPete · 10-21-2015, 09:09 AM

This is the basic detection list.

Quote:

The AUC II sensor has the ability to detect:
• Carbon Monoxide (CO)
• Hydrocarbons (HC)
• Oxides of Nitrogen (NOx gasses).

I've seen a more detailed listing at the dealer, thought I had a copy. If I do find it, I'll add the detail.

HighlandPete

Kev314 · 10-21-2015, 09:40 AM

Quote:

Originally Posted by DDD31

Simple, the nasal ranger

Does the range accuracy get better as nostril separation increases, so it might work well for one person but not another?

Kev314 · 10-21-2015, 09:43 AM

Quote:

Originally Posted by HighlandPete

This is the basic detection list.

I've seen a more detailed listing at the dealer, thought I had a copy. If I do find it, I'll add the detail.

HighlandPete

Thanks HighlandPete, that's interesting - didn't know it would do all that. Guess we don't have to worry about NOx if stuck in traffic behind a slow moving VW.

visor · 10-22-2015, 02:22 AM

Quote:

Originally Posted by HighlandPete

This is the basic detection list.

I've seen a more detailed listing at the dealer, thought I had a copy. If I do find it, I'll add the detail.

HighlandPete

Cool! I guess the EPA could've used our BMW's climate control to test those VW TDI diesel engines for pollution.

Dang3r · 10-22-2015, 04:51 AM

Quote:

Originally Posted by visor

Cool! I guess the EPA could've used our BMW's climate control to test those VW TDI diesel engines for pollution.

If you want to do it this way...

ft1330 · 10-22-2015, 07:33 AM

Quote:

Originally Posted by HighlandPete

This is the basic detection list.

I've seen a more detailed listing at the dealer, thought I had a copy. If I do find it, I'll add the detail.

HighlandPete

I guess it's missing the garbage detector indeed

DDD31 · 10-22-2015, 08:49 AM

Now I wish BMW would come up with a sensor to detect interior odors and somehow prevent the rest of the passengers having to smell it (especially after a trip to Chipotle).

rking117 · 10-22-2015, 08:59 AM

Quote:

Originally Posted by HighlandPete

Has a 'sniffer' sensor. There is a range of pollutants that it senses. I'm sure I've got the data somewhere on file, I'll see if I can find the list when I've a few spare minutes.

HighlandPete

well i think my sniffer is a bit more sensitive than the cars cause i still smell the garbage dump, the brush fires, the diesel trucks exhaust and sometimes farts i think. Wait scratch the last one that might be me.

Quote:

Originally Posted by visor

Cool! I guess the EPA could've used our BMW's climate control to test those VW TDI diesel engines for pollution.

your saying they didnt?

DD335i · 10-22-2015, 10:39 AM

I just keep mine always on circulate.

Any drawbacks to that?

visor · 10-22-2015, 11:17 AM

Quote:

Originally Posted by DD335i

I just keep mine always on circulate.

Any drawbacks to that?

If you don't have any windows open, then you really don't have any fresh air at all. You may be fine for a short 10 min drive, but if driving say for an hour like that (and especially if you have a few passengers), then hypoxia will start setting in and while you may not suffocate, you will feel increasingly lethargic.

So, no. Not a good idea.

Golden Arrow · 10-22-2015, 12:48 PM

Quote:

Originally Posted by DDD31

Now I wish BMW would come up with a sensor to detect interior odors and somehow prevent the rest of the passengers having to smell it (especially after a trip to Chipotle).

Mercedes and BMW both have a perfume system integrated with the cabin climate control.

You can have a lovely violet scent mixed with your Chipotle burrito. No air freshener can top that.

DrivenByE30 · 10-22-2015, 12:59 PM

Quote:

Originally Posted by DD335i

I just keep mine always on circulate.

Any drawbacks to that?

You need to get fresher air in regularly....
You dont want to smell your own fart on recirculation...

I dont tot in my car... And i always have the fresh air in.... Except when i see a dump truck ahead then i manually put in recirculate.... No bad smell

DD335i · 10-22-2015, 01:08 PM

Most of the time I have the sunroof tilted but I understand the point. Thanks guys

I get tired of weird smells. Lol
Diesel, dumps, we got it all in fl. Lol

Ganxxta · 10-22-2015, 01:25 PM

Quote:

Originally Posted by visor

If you don't have any windows open, then you really don't have any fresh air at all. You may be fine for a short 10 min drive, but if driving say for an hour like that (and especially if you have a few passengers), then hypoxia will start setting in and while you may not suffocate, you will feel increasingly lethargic.

So, no. Not a good idea.

Actually the manual mode will be overridden after some time automatically to avoid just that. At least that was the case in all my previous cars.

10-20-2015, 09:06 PM	#1
Kev314 Private First Class 44 Rep 143 Posts Drives: 2014 328 xdrive Join Date: Jan 2015 Location: Massachusetts iTrader: (0)	Recirculated air mode - physical principle? The recirculated air control has a mode where, quoting the manual, "...a sensor detects pollutants in the outside Air and controls the shutoff automatically." How does it detect pollutants? Possibly a photocell which detects small particles?
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10-20-2015, 09:22 PM	#2
jd_perspective Captain 344 Rep 906 Posts Drives: 2016 X3 35i M-Sport Join Date: Nov 2014 Location: Orlando, FL iTrader: (0)	would love to see peoples responses. i get mad when driving past the garbage dump when driving to south florida and i still smell it. shouldn't the car shut the smells out?? usually it's good though. i have to say i used to smell things like cigarette smoke a lot with prior cars. now i never smell it with the windows up and my car is always on automatic ac recirculate __________________ 2016 X3 35i M-Sport 2019 440i Coupe M-Sport - Retired 2018 330i Sedan M-Sport - Retired 2015 428i Gran Coupe M-Sport - Retired
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10-20-2015, 10:41 PM	#3
adhrp Lieutenant Colonel 1303 Rep 1,626 Posts Drives: 2020 M550i (G30)/2021 X3 (G02) Join Date: Jun 2014 Location: FL iTrader: (0)	Not sure about smells, but it works pretty well for particulate matter such as smoke. I have noticed it a few times when vehicles discharged plumes of black smoke and I didn't smell it in the cabin. __________________ 2020 M550i (G30) \| Carbon Black/Black Nappa \| DHP \| DAP \| Executive \| Luxury Seating \| Park Asst \| Ceramic Controls \| Front/Rear Heated Seats \| 20" 668M wheels 2021 X3 (G02) \| Dark Graphite Metallic/Cognac \| Premium \| DAP \| Front/Rear Heated Seats Sold/Retired: 2012 328i (F30)
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10-20-2015, 10:45 PM	#4
DDD31 Captain 1649 Rep 891 Posts Drives: 24 M3CS, 95 E320, 85 300CD Join Date: Jul 2015 Location: Michigan iTrader: (0)	Simple, the nasal ranger
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10-21-2015, 03:04 AM	#5
HighlandPete Lieutenant General 6659 Rep 15,858 Posts Drives: BMW F11 535i Touring Join Date: Mar 2007 Location: Scotland, Highland Region iTrader: (0)	Has a 'sniffer' sensor. There is a range of pollutants that it senses. I'm sure I've got the data somewhere on file, I'll see if I can find the list when I've a few spare minutes. HighlandPete
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10-22-2015, 08:49 AM	#12
DDD31 Captain 1649 Rep 891 Posts Drives: 24 M3CS, 95 E320, 85 300CD Join Date: Jul 2015 Location: Michigan iTrader: (0)	Now I wish BMW would come up with a sensor to detect interior odors and somehow prevent the rest of the passengers having to smell it (especially after a trip to Chipotle).
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10-22-2015, 10:39 AM	#14
DD335i First Lieutenant 117 Rep 355 Posts Drives: '14 BSM F30 335i Join Date: Jan 2015 Location: South Florida iTrader: (0)	I just keep mine always on circulate. Any drawbacks to that? __________________ '14 F30 335i Msport bsm-black dakota Tech-Premium-HK South Florida Real Estate
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10-22-2015, 01:08 PM	#18
DD335i First Lieutenant 117 Rep 355 Posts Drives: '14 BSM F30 335i Join Date: Jan 2015 Location: South Florida iTrader: (0)	Most of the time I have the sunroof tilted but I understand the point. Thanks guys I get tired of weird smells. Lol Diesel, dumps, we got it all in fl. Lol __________________ '14 F30 335i Msport bsm-black dakota Tech-Premium-HK South Florida Real Estate
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