Go Back   EcoModder Forum > Introductions
Register Now
 Register Now

Reply  Post New Thread
Submit Tools LinkBack Thread Tools
Old 02-05-2010, 12:56 PM   #1 (permalink)
EcoModding Lurker
Join Date: Jan 2010
Location: Los Angeles, CA
Posts: 54
Thanks: 0
Thanked 20 Times in 8 Posts
Belated Intro...

After lurking for months, I finally started recently posting.

It would be fare to say that I am a semi-eco driver. Especially with a vehicle that is probably very rare here, a 2001 Chevy Suburban!

Yes, howl away, but A) it is pretty much only driven weekly, and almost always loaded to capacity (except for emergencies, we only use it for volunteer stuff, be it hauling canned foods or adaptive equipment for the disabled). B) it has over 200,000 miles and I figure that everything between here and 300,000 is a lower total carbon footprint than replacing it, especially with a vehicle that can haul. And C) I still get better than EPA and keep the emissions stuff tip top. In fact, I simulate the narrow band O2 sensors so that I can fool the ECU into running much closer to peak cat efficiency more of the time.

That last one relates to my day job, which is taking these technologies:

EmiSense Technologies, LLC: Smart Sensors - Clean Emissions

And getting them into products and vertical applications. So what I did with my truck (yes, I'm a guy, so the SUV is a 'truck') is very much like something I had already done with engines like these:

The reason I started lurking was a rather different product that I was doing for a motorsports company. That may sound like a contradiction, but motorsports was the first commercial applications for Digital Direct(tm) technology. And, in its way, it helps make a 'dirty' application greener. The norm had been to run pig rich, but we demonstrated that the path to 'meaner' is often 'leaner' which happens to be 'greener' (bad puns intended).

After receiving an innovation award from MIT and the SAE for technologies that should be aggressively developed for addressing fuel efficiency and global warming, we've had the opportunity to move increasingly into 'green' applications, but we still have strong ties to motorsports.

Anyway, the product has a free companion iPhone app I was writing, and it was agreed that we could commit some views to Economy instead of just Performance. I ended up with a fill-up log, where I used GPM and GP100M and CPM and CP100M instead of MPG, because I think it better conveys to people how much fuel and money they use in accomplishing something. I also did some slightly more intelligent averaging, since I didn't want people topping up all the time to get meaningful results.

I also did a live economy view. After logging lots of miles for 10 drivers on 7 vehicles, and lots of internal discussion, I ended up with three different metrics. First, I show a raw MAF or MAP type MPG calculation (with no real attempt to weight or calibrate). This does give a vacuum gauge type response. Below it I show an average of the reading for the trip, and for the calendar day - but again, it is just 'fuel economy', not MPG (for the existing user base, calibrations and entering lots of supplemental info just didn't seem practical).

The second metric is a little animation. I used load and the raw MPG to present a reward for just driving a little less aggressively. A user here? No. But I figured if I could get the average driver to be even slightly less aggressive, it would be a plus.

The third metric is, well, odd. I wanted it to work without any hardware other than the iPhone, so I did a fairly sophisticated 3 axis motion estimation and vibration filter. I strove to create a reading where, if you just strive to keep it peaked, you end up adopting a lot of the more fuel efficient techniques that are discussed here.

I was originally tempted to show off my latest 'baby' here (I actually like how this one turned out, and it was one of those rare occasions where, for better or worse, it is all me, HW, firmware, software). But I don't want to be identified as a viral marketer! So, I'll just limit myself to showing a glimpse of a section of one of the first time 'read me' pop ups:

I did try to give proper credit where credit was due. And I hope that the comment about the reaction of other drivers doesn't offend. FWIW, I get my share of honks and digitus impudicus driving this way myself.


  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

Old 02-05-2010, 02:30 PM   #2 (permalink)
...beats walking...
Join Date: Jul 2009
Location: .
Posts: 6,190
Thanks: 179
Thanked 1,525 Times in 1,126 Posts
Originally Posted by jfitzpat View Post
I was originally tempted to show off my latest 'baby' here. But I don't want to be identified as a viral marketer!
...honest, we don't bite (ha,ha)!

Originally Posted by jfitzpat View Post
I get my share of honks and digitus impudicus driving this way myself.

...ah, yes, the in-famous single-digit "salute" (or "IQ" indicator). "Slow is good," is common here, too. Metaphorically, it's TORTOISE over the HARE here.

...in the Navy, I was an aircrewman aboard a long-range radar reconnaissance plane that had the well-earned motto: "...low and slow, with no place particular to go." 16-20 hours at a time at about 180 mph made for l-o-n-g missions.

...the same "slow" philosophy works exceptionally well with fuel economy versus milage.

...and, yes, I too studied Latin..."Welcome Aboard!"

Last edited by gone-ot; 02-05-2010 at 04:50 PM..
  Reply With Quote
Old 02-05-2010, 03:14 PM   #3 (permalink)
Master EcoModder
tasdrouille's Avatar
Join Date: Jan 2008
Location: Mirabel, QC
Posts: 1,672

The Guzzler - '08 Hyundai Elantra GL
90 day: 33.12 mpg (US)

Got Soul? - '11 Kia Soul 2U
Thanks: 35
Thanked 86 Times in 57 Posts
Hi jjf,

Welcome to EM!

It's nice tou have you here. You are a valuable ressource and I hope you stick around.


www.HyperKilometreur.com - Quand chaque goutte compte...
  Reply With Quote
Old 02-05-2010, 05:31 PM   #4 (permalink)
cfg83's Avatar
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 529 Times in 356 Posts
jfitzpat -

Welcome to EM! I can't help but think that you are positioning yourself for the clean diesel market. I am going to go back and read all your posts because it looks like great stuff.



What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote
Reply  Post New Thread

Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Long intro from western Mass Chalupa102 Introductions 4 09-28-2009 05:06 PM
Biz Intro MartinShen Introductions 1 12-10-2008 10:17 PM
Desotojohn - Intro (2002 F-150 5.4) desotojohn Introductions 2 12-10-2008 12:24 AM
My TDI. (intro thread) Deezler Aerodynamics 9 11-28-2008 08:35 PM
Jeep intro DoctorP82 Introductions 4 07-04-2008 10:14 PM

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com