Go Back   EcoModder Forum > EcoModding > General Efficiency Discussion
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 04-01-2010, 09:52 PM   #11 (permalink)
EcoModding Apprentice
 
Join Date: Sep 2008
Location: Indiana
Posts: 131

Impala - '04 Chevrolet Impala base
90 day: 32.84 mpg (US)
Thanks: 0
Thanked 2 Times in 2 Posts
Hmm, seeing stats like this makes me hunger for that blasted ScanGauge...lol

__________________
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 11-01-2013, 02:07 PM   #12 (permalink)
EcoModding Apprentice
 
HypermilerAX's Avatar
 
Join Date: Apr 2011
Location: Southern France
Posts: 155

Peugeot 205 - '91 Peugeot 205 turbo D
90 day: 65.63 mpg (US)

CitroŽn AX - '95 CitroŽn AX 1.5D
90 day: 80.81 mpg (US)
Thanks: 12
Thanked 64 Times in 36 Posts
Idle consumption of a 1.5 diesel vs engine temp

Measurement method:
Fuel pumped out of a bottle and weighed with 0.1 g precision. The scale was oscillating a lot though (vibrations?).

I ran the engine for a minute or so in order to expel all the air. I waited for the engine to cool down completely. I noted the value every 10 seconds the first 10 minutes and then 30 seconds until 15 minutes. I attached the raw graph (spaces are due to scale shut down, values in ml/h) and another minute by minute with engine temps but here are the most interesting values:

Avg over first minute : 976 ml/h
2nd minute : 585,5 ml/h
3rd : 571,1 ml/h
...
Avg from 13:00 to 15:30 : 393,3 ml/h

Wow, that is low. I'll think twice before EOCing.

After 15 minutes of idling, the engine wasn't completely warm (especially oil temp) so I will do another test right after a (long) trip.
Attached Thumbnails
Click image for larger version

Name:	P1010013b.JPG
Views:	42
Size:	47.4 KB
ID:	14042  Click image for larger version

Name:	conso ralenti.JPG
Views:	37
Size:	112.1 KB
ID:	14043  Click image for larger version

Name:	conso ralenti2.JPG
Views:	34
Size:	49.5 KB
ID:	14045  
__________________
CitroŽn AX 1.5 D 310.000 km
AX Eco Project : 100 mpg target !

Last edited by HypermilerAX; 11-01-2013 at 02:21 PM..
  Reply With Quote
The Following 4 Users Say Thank You to HypermilerAX For This Useful Post:
Piwoslaw (11-01-2013), redpoint5 (11-01-2013), serialk11r (11-05-2013), some_other_dave (11-02-2013)
Old 11-01-2013, 10:17 PM   #13 (permalink)
It's all about Diesel
 
cRiPpLe_rOoStEr's Avatar
 
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 6,464
Thanks: 0
Thanked 634 Times in 562 Posts
No wonder my uncle says that it's not worth to shut down an old-school Diesel for short times. Well, maybe the newer-generation ones with direct injection and more advanced controls, due to their lower internal temperatures, tollerate more EOC than an IDI does.
  Reply With Quote
Old 11-02-2013, 06:43 AM   #14 (permalink)
EcoModding Apprentice
 
HypermilerAX's Avatar
 
Join Date: Apr 2011
Location: Southern France
Posts: 155

Peugeot 205 - '91 Peugeot 205 turbo D
90 day: 65.63 mpg (US)

CitroŽn AX - '95 CitroŽn AX 1.5D
90 day: 80.81 mpg (US)
Thanks: 12
Thanked 64 Times in 36 Posts
271,4 ml/h over 6 minutes with completely warmed up engine. That seems credible, I see 0.3/0.4 l/h over the net for mid-sized diesel engines.
__________________
CitroŽn AX 1.5 D 310.000 km
AX Eco Project : 100 mpg target !
  Reply With Quote
Old 11-02-2013, 05:56 PM   #15 (permalink)
Master EcoModder
 
ever_green's Avatar
 
Join Date: May 2011
Location: Toronto
Posts: 261

Blueberry - '17 Mazda Mazda3 GS
90 day: 32.56 mpg (US)

EVO - '08 Mitsubishi Evolution MR
90 day: 23.82 mpg (US)
Thanks: 8
Thanked 76 Times in 31 Posts
Quote:
Originally Posted by HypermilerAX View Post
271,4 ml/h over 6 minutes with completely warmed up engine. That seems credible, I see 0.3/0.4 l/h over the net for mid-sized diesel engines.
wow thats low. for my 2.5L engine its exactly 1L/H.
__________________
  Reply With Quote
Old 11-02-2013, 06:15 PM   #16 (permalink)
Master EcoModder
 
HyperMileQC's Avatar
 
Join Date: Sep 2011
Location: Laval, QC
Posts: 525

Trollinsight (Retired) - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 68.06 mpg (US)

Redsight - '01 Honda Insight
Team Honda
Gen-1 Insights
Thanks: 310
Thanked 86 Times in 65 Posts
Send a message via MSN to HyperMileQC
In my Insight when fully warmed up (92įC) its around 0.15 - 0.2 L/h. But in general it doesn't make any noise and its 0 L/h .
__________________
Trollinsight Modding Thread

2000 Honda Insight MT Silverstone Metallic #95 (CAN) 131K mi. 81.7 Lmpg
Best Tank : 100.06 MPG (US) | 120.2 MPG (Imp) | 2.35 L/100Km | 42.54 Km/L
Best commute : 130.8 MPG (US) | 157.1 MPG (Imp) | 1.8 L/100Km | 54.84 Km/L
Best Trip : 111.8 MPG (US) | 134.3 MPG (Imp) | 2.1 L/100Km | 47.53 Km/L
  Reply With Quote
Old 11-03-2013, 11:40 AM   #17 (permalink)
Master EcoModder
 
Join Date: Oct 2009
Location: Fort Worth, Texas
Posts: 1,936

2004 CTD - '04 DODGE RAM 2500 SLT
Team Cummins
90 day: 19.36 mpg (US)
Thanks: 937
Thanked 508 Times in 384 Posts
I would assume .33 to 1.0/gls hour for most any motor, up to and including the 15L Cummins in my work Peterbilt.

But, what would be the point of idle rpm fuel consumption measurements? I'd think "engine wear without work performed" would be more useful way of thinking about it (and there are scenarios where providing heating or cooled air for passengers is if high value). Engines are designed with a number of hours of economic life as a gauge. Right down to a two-stroke weedeater (cheap one at 250/hrs) to the light duty diesel in my pickup (10,000-hrs) not just commercial calculations.

The percent idle time is a recognized metric. A mph averageotherwise. On my pickup brand engine if one keeps that average at 27-mph or higher then FE is relatively good. The 10K engine life expectation (mean time between overhaul) is predicated on a 35-mph average.

The "usefulness" of engine idle fuel consumption [EIFC] ought to be related, somehow, to performance (achieving work). In a hurricane evactuation, for example, I'd expect that -- small to large -- personal vehicles are going to do no better than 3-5/mpg in bumper-to-bumper traffic. EIFC is not important in this, it is fuel capacity that matters far more (and, as note, the ability to travel 150-miles inland to be able to re-fuel from undisturbed stocks).

On the work Peterbilt we engage "high idle" if idling is to be extended past five minutes per the manufacturer instructions. Engine longevity/reliability far exceeds reduced consumption at this low level.

So, what am I missing as to importance, here?

.
__________________
2004.0 DODGE Ram QC/LB 2500 2WD/NV-5600 305/555 ISB. 7,940-lb. Stock. 200,000 miles/5000-hrs @ 40-mph average.
1990 35' Silver Streak TT 7,900-lb.
11-cpm solo & 19-cpm towing; 21-mpg average past 54k-miles
Sold: 1983 Silver Streak 3411
  Reply With Quote
Old 11-05-2013, 07:01 AM   #18 (permalink)
Master EcoModder
 
Join Date: Jan 2012
Location: United States
Posts: 1,244

spyder2 - '00 Toyota MR2 Spyder
Thanks: 76
Thanked 203 Times in 151 Posts
According to Torque and my Ebay OBDII scanner, 0.18 gph fully warmed up coolant at 680rpm idle for a pre 2003 Toyota 1ZZ-FE (1794cc). I didn't measure it after driving a while though (hotter oil, should have slightly less friction), but I'm using 5W-20 instead of 10W-30 so that cuts the difference a bit.

I am getting the intake cam duration increased which would lower the vacuum, hoping that can cut it to like 0.16 gph :O I want to get an Apexi Power FC and play with the idle, I feel like the car should be able to idle okay at 500rpm without too much misfiring, if the gph scales proportionally that would be a fantastic 0.13ish idle. The aftermarket ECU would also let me reduce the faster idle that comes on with AC or higher electrical loads.

Last edited by serialk11r; 11-05-2013 at 07:07 AM..
  Reply With Quote
Old 11-05-2013, 05:46 PM   #19 (permalink)
Master EcoModder
 
Ecky's Avatar
 
Join Date: Dec 2011
Location: Vermont
Posts: 2,556

Gaptooth - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 68.85 mpg (US)

Such Fit - '07 Honda Fit Sport
90 day: 41.27 mpg (US)

Velomobile - '13 Sun Seeker EZ-TAD SX
Last 3: 2142.86 mpg (US)
Thanks: 857
Thanked 974 Times in 619 Posts
Honda B18B1 (1.8L from 90's Integra):

750rpm
0.22gph

Last edited by Ecky; 11-05-2013 at 05:53 PM..
  Reply With Quote
Old 11-05-2013, 09:48 PM   #20 (permalink)
Master EcoModder
 
Join Date: May 2012
Location: Indiana
Posts: 1,324

Traverse 2LT FWD - '12 Chevrolet Traverse 2LT
90 day: 21.2 mpg (US)

Volt, gas only - '12 Chevrolet Volt Premium
90 day: 41.46 mpg (US)

Volt, electric only - '12 Chevrolet Volt Premium
90 day: 132.84 mpg (US)
Thanks: 119
Thanked 277 Times in 184 Posts
In the summer and a fully warm engine.
3.2 v6 .45 gal/h

__________________




  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Honda IACV explained TomO Off-Topic Tech 16 12-21-2015 01:49 AM
High Idle after EOC Devon Hynes Hypermiling / EcoDriver's Ed 3 03-26-2010 10:35 PM
Idle Speed Adjustment '89 Metro SirKeats DIY / How-to 7 02-08-2010 02:23 PM
Consumption at idle groar Instrumentation 12 01-17-2009 07:12 AM
Altered Idle Speed After Performing EOC Tango Charlie Hypermiling / EcoDriver's Ed 20 11-19-2008 12:41 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com