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Auto Climate Control Is Backwards

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GlennA
User Rank
Gold
Re: Seems right to me
GlennA   2/23/2012 9:40:01 AM
NO RATINGS
In winter I have passed cars with every window fogged up.  I use the outside air setting in cold weather - I guess the occupants of the fogged up car didn't have an experienced driving instructor.  In summer, I open all of the windows and set the A/C to outside air initially.  After the hot cabin air, and the hot air in the vent system, is flushed, then I change to recirculate.

I agree with the final comment that the human has better reasoning than the canned program.

OLD_CURMUDGEON
User Rank
Platinum
TOYOTA HIGHLANDER climate control, etal.
OLD_CURMUDGEON   2/23/2012 10:28:49 AM
NO RATINGS
This "problem" is not isolated to the HIGHLANDER.  It also rears its ugly head in the CAMRY.  It's ironic when reading this blog, and the comments that follow, that one should take note of the recent TOYOTA radio advertisements that have been running for several months in my local market........  The 2012 TOYOTA CAMRY..... THE MOST TECHNILOGICALLY ADVANCED CAMRY YET! 

Woe is me!  I wish I still had my 2006 Camry.  It was relatively simple; I could adjust the various control functions myself, all WITHOUT the aid of a microcontroller or two.  My 2010 CAMRY replacement can't hold a candle to the 2006 model!  I shudder to think of the next time I'm in the market for a replacement. 

bob from maine
User Rank
Platinum
Climate Control
bob from maine   2/23/2012 10:29:06 AM
NO RATINGS
Makes sense to me. From a human standpoint, dry 90 degree air is more comfortable than humid 80 degree air. Thus re-circ passes cabin air repeatedly over the coils to remove humidity. Once the air is releatively dry, outside air can be brought-in dehumidified and cooled. For winter, when in re-circ - cabin air picks up moisture from the occupants and floor mats and is then re-directed against the cold windows creating frost. Taking outside air in winter draws in dry air which is heated and circulated. Well designed climate control in high-end cars blends cooled and heated air and keeps cabin air circulating continuously, they sense humidity, inside/outside temperature and adjust the controls as necessary, less well designed "temperature control" systems either heat or cool only and when the 'set' temp is achieved, the fan shuts down or goes to the lowest speed thus cabin air movement virtually ceases. There is a reason Mercedes cost more than Toyotas.

roddalitz
User Rank
Gold
Re: Another pointless automation
roddalitz   2/23/2012 10:39:54 AM
NO RATINGS
"Ratchets" - I think you mean detents? Ratchet is a one-way mechanism.

Rob Spiegel
User Rank
Blogger
Re: Another pointless automation
Rob Spiegel   2/23/2012 1:11:39 PM
Interesting, Tim. A small item like that can help determine whether or not you like a particular car. This is a good example of a change to digital just for the sake of digital. You actually lose a degree of control with the upgrade to digital.

ViragoMan
User Rank
Silver
Re: TOYOTA HIGHLANDER climate control, etal.
ViragoMan   2/23/2012 1:22:51 PM
NO RATINGS
Wow. Guess I'll hold onto my 2002 196k mi. 5-speed manual Camry. Only issue with cabin air selection is automatic cancellation of recirculation mode when main selector is changed. Pulling outside air in during a rainstorm in Houston is counterproductive, so I always push the recirculate button again.

OLD_CURMUDGEON
User Rank
Platinum
Re: TOYOTA HIGHLANDER climate control, etal.
OLD_CURMUDGEON   2/23/2012 1:41:40 PM
@VIRAGOMAN:  Tampa / St. Pete / Clearwater  area ain't no joy when it comes to HUMIDITY either!  So, I feel your pain!!!

By the way, this 2010 CAMRY is SO smart that when you turn the dial for max. COLD on the TEMP knob, it automatically puts the A/C on in RECIRC mode, whether you want it or not!  But, when you turn the knob a little to the c.w. position, it does NOT turn the A/C off.  You must then press the center of the other knob to turn it off.  There's so much about the 2010 that I dislike, it would take a tome to describe all its "wonderful" engineering enhancements!!!!!

Rob Spiegel
User Rank
Blogger
Re: TOYOTA HIGHLANDER climate control, etal.
Rob Spiegel   2/23/2012 2:44:52 PM
NO RATINGS
I agree, ViragoMan. Reminds me of electric windows. While I greatly prefer electric windows to manual crank windows, when the battery goes, the electric windows don't work. There are moments when a manual crank window comes in handy.

curious_device
User Rank
Gold
Re: Climate Control
curious_device   2/23/2012 3:19:33 PM
"Taking outside air in winter draws in dry air" - "Dry" is not a word used on the West coast in winter.   These systems need a manual mode that is truly manual.


bob from maine
User Rank
Platinum
Re: Climate Control
bob from maine   2/23/2012 3:41:06 PM
That's why one-size-fits-all 50K lines-of-code programs that operate 20 different computers don't fit all cars sold everywhere in the world. Just imagine how enjoyable it'll be to drive a car with radar speed/distance sensing when driving in a very wet heavy snow or getting slush thrown onto your front bumper while passing a semi. Slamming on the brakes at 50 with no warning should certainly enhance safety on the interstates. Probably work on in Southern California though.

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