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08-01-2010, 11:17 AM | #181 | |
Drives: Red 3 Dr HB 2008 Auto. Join Date: Feb 2009
Location: New-Brunswick , Canada
Posts: 60
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Quote:
If someone could confirm |
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08-01-2010, 11:33 AM | #182 |
Drives: 2010 Yaris Sedan Join Date: Feb 2010
Location: Kansas
Posts: 871
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I know you shouldnt if the motor is not running and your coasting, but if memory serves me, the pump is running all the time, even in neutral.
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08-01-2010, 03:20 PM | #183 | |
Nothing beats a Toyota!
Drives: 2013 Yaris 5 dr liftback Join Date: Jan 2009
Location: Indianapolis, Indiana
Posts: 564
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Quote:
Might be urban legend....might be for old trannys that were made by Govt. Motors back in the day....but my Dad taught me this and he was a Mechanical Engineer and I always thought his words were the rule! So it is my rule!
__________________
Big Dave Indianapolis, IN Synthetic Oil....its in my car.....for at least 10,000 miles! |
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08-01-2010, 05:16 PM | #184 |
Half a Bubble Off Plumb
Drives: 2009 Yaris Sedan Join Date: Mar 2009
Location: Bristol, Tennessee, USA
Posts: 1,593
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DFCO is not worth giving all the attention people are giving it here. It's just cutting off the tiny bit of idle fuel that cars used to waste while coasting in gear. It's done for emissions control primarily. Nearly every car has it now. No biggie.
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08-01-2010, 09:10 PM | #185 | |
Steals terrorist's lunch
Drives: 2007 Yaris Liftback Join Date: Mar 2007
Location: Reno, Nevada, USA
Posts: 1,299
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Quote:
Please also remember that for folks that live in hilly areas DFCO is even more useful. For example, when coming down the mountain I can stay in DFCO for several miles at a time. That makes a huge impact over the course of each tank.
__________________
- Brian Share the Road I often carry 2 carpool passengers and mountain bikes or snowboards/skis over a 4,500 foot elevation difference. Click the graphic above to see my detailed mileage logs. |
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08-02-2010, 11:46 AM | #186 | |
Quote:
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08-03-2010, 10:17 AM | #187 |
Drives: Yaris 1.3 SR Join Date: May 2010
Location: Somerset
Posts: 29
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Hi All.
I've been insterestedin DFCO for a while now since Top Gear did a feature on it. I have adjusted my driving style to encourage the DFCO, but my motives were not to see my MPG improve dramatically and save cash. My view is, if I have a leaky tap, (or fawcet to you guys over the pond :-)), that drips every 20 seconds, it wont add much to my water bill, but why waste the water? Anyway, I have often wondered if the DFCO can be better used. I have an armchair thoery on utilising it, see what you think. Here is the theory: Drive at 60mph, let the car engine break down to 50mph in DFCO, gently accellerate back to 60mph. Repeat the cycle. Now, assuming that the decelleration and accelleration times were equal and on a flat road, would you see an overal improvement in economy, a reduction or no change? |
08-03-2010, 11:25 AM | #188 | |
Quote:
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08-03-2010, 08:31 PM | #189 |
Drives: 2007 4dr Sedan Silver Streak Join Date: May 2010
Location: Montreal, Canada
Posts: 73
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Don't you just use the energy you saved "gliding" when "pulsing?" This pulse and glide thing sounds like it defies the laws of conservation of energy, same goes with the mountain driving. Please explain how this is possible.
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08-11-2010, 09:56 PM | #190 |
Drives: 2007 Toyota Yaris AT Join Date: Jul 2010
Location: Phoenix, AZ
Posts: 5
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I don't have an RPM gauge.. at what speeds will it be wise to use DFCO? I have been using it, but I'm not sure if it's pointless after I've already slowed.. what speeds are typically above 1100 rpm?
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08-11-2010, 10:25 PM | #191 |
Drives: 2007 4dr Sedan Silver Streak Join Date: May 2010
Location: Montreal, Canada
Posts: 73
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In "D" the engine kicks in as high as 30mph, in "3" about 20-25 and in "2" I'm not sure, but it's pretty slow. You can usually feel the engine turn on because all of a sudden you need to apply a little more brake, the car seems to surge.
I love that there's no answer to the laws of conservation of energy, I guess I'll have to raise this little flag here... |
08-11-2010, 10:51 PM | #192 | |
Drives: Barcelona Red '09 Sedan Join Date: Jul 2010
Location: New Mexico
Posts: 47
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Quote:
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08-19-2010, 11:49 AM | #193 |
Drives: Scion FR-S 2013 Join Date: Aug 2010
Location: Coamo, Puerto Rico
Posts: 423
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Man information is great!
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08-19-2010, 12:03 PM | #194 | |
Quote:
Resources: http://www.metrompg.com/posts/pulse-and-glide.htm http://www.greenhybrid.com/discuss/f...se-glide-3700/ |
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08-26-2010, 12:00 PM | #195 |
Drives: 07 Yaris Sedan, Auto Join Date: Jun 2010
Location: SE Texas
Posts: 327
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i have a early 2007 automatic yaris sedan, manufactured in june 2006. can anyone explain what this means, i copied it from the first page of this thread:
"Early versions pf the AT (Including ones sold in the U.S. until around January 2007) can only achieve DFCO with a gear selection lower than (D)rive, i.e. 3 or L, but since half way through the 2007 model year the AT can achieve DFCO in all gears.." does this mean when i drive around in D that i am never in dfco mode, or does it mean that the dfco only kicks in as the vehicle slows down coasting in a lower gear than D (even though my shifter is still in D)? thanks |
08-26-2010, 02:13 PM | #196 | |
Steals terrorist's lunch
Drives: 2007 Yaris Liftback Join Date: Mar 2007
Location: Reno, Nevada, USA
Posts: 1,299
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Hi brg88tx,
Perform the test outlined in the first post to see if yours kicks in DFCO in Drive or if you have to downshift: Quote:
__________________
- Brian Share the Road I often carry 2 carpool passengers and mountain bikes or snowboards/skis over a 4,500 foot elevation difference. Click the graphic above to see my detailed mileage logs. |
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08-26-2010, 04:15 PM | #197 |
Half a Bubble Off Plumb
Drives: 2009 Yaris Sedan Join Date: Mar 2009
Location: Bristol, Tennessee, USA
Posts: 1,593
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As I understand it, it means that DFCO never works when the shifter's in D. But testing it is the only way to be sure for yours. Individual cars often don't match the published specs exactly.
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03-26-2011, 05:19 PM | #198 |
I've made a post!
Drives: yaris hb Join Date: Feb 2009
Location: delaware oh
Posts: 1
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dfco
why set cutoff at 21, versus any other figure
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