Pete7874's Forum Comments
Showing all comments by Pete7874.
A preview of our new site for Earth Day!
It's a bit difficult trying to figure out where things are, but all in all, I like the new design.
The Fuelly badge link doesn't work though.
posted by Pete7874 May 18, 2011 at 7:06 PM
Pulse and Glide?
dkruitz, VWJunky, that's basically my take on it as well. The reason I started this subject was because I thought I was missing something here. You'd be surprised how many P&G hardcore fanatics are out there though. This isn't something I'd be able to try out here in Chicago area, even if I wanted to... I'd get shot by other drivers probably.
posted by Pete7874 January 27, 2009 at 6:50 PM
Electric
You can usually look up your electric usage history by logging into your utility company's online account.
Other than that, when it comes to electricity, the added value from a site like Fully is kind of lost in my opinion as it would be like comparing apples to oranges... no two households are the same. At least with cars, you can compare usage from the same make/model.
Or did you mean like a forum where users would post tips about how to cut down on your electricity usage?
posted by Pete7874 January 26, 2009 at 12:28 PM
Incorrect mpg value when browsing cars
Thank you!
Yeah, I was doing some editing here before. :)
posted by Pete7874 January 18, 2009 at 2:38 PM
Pulse and Glide?
Yup, you need to be above certain (rather low) rpm level for the fuel cut-off to work.
posted by Pete7874 January 17, 2009 at 12:42 PM
> I'm sure we all know that, but the general speak was that fuel is
> completely cut off when your foot is removed from the gas pedal.
> Not true, gas will always be used as long the engine is on.
I don't know about automatics, but manuals definitely cut off all fuel when coasting in gear. The engine is running because the wheels (car's momentum) are turning it, not because it burns gas.
If you have a trip computer with momentary fuel consumptions, you will notice that the consumption drops to nothing when you stay in gear but take the foot off the gas pedal.
Check the response next to last in this thread:
http://action.publicbroadcasting.net/cartalk/posts/list/1242810.page
Also this:
http://wikicars.org/en/Manual_transmission#Advantages
"Fuel cut-off. The torque converter of the automatic transmission is designed for transmitting power from the engine to the wheels. Its ability to transmit power in the reverse direction is limited. During deceleration, if the torque converter's rotation drops beneath its stall speed, the momentum of the car can no longer turn the engine, requiring the engine to be idled. By contrast, a manual transmission, with the clutch engaged, can use the car's momentum to keep the engine turning, in principle, all the way down to zero RPM. This means that there are better opportunities, in a manual car, for the electronic control unit (ECU) to impose deceleration fuel cut-off (DFCO), a fuel-saving mode whereby the fuel injectors are turned off if the throttle is closed (foot off the accelerator pedal) and the engine is being driven by the momentum of the vehicle. Automatics further reduce opportunities for DFCO by shifting to a higher gear when the accelerator pedal is released, causing the RPM to drop."
posted by Pete7874 January 16, 2009 at 4:29 PM
> In most modern fuel injected computer controlled automotive and
> truck engines when the throttle is closed (your foot is totally off the
> accelerator pedal) and cruise control is not operating will completely
> shut off the fuel delivery to the engine.
My car is manual, so if I leave the car in gear and the the foot off the accelerator - it's true, the fuel consumption is zero. But then the deceleration is rather quick. If I wanted to slow down the deceleration, I would have to put the car in neutral, and in neutral the car does consume fuel.
> So basically you are burning zero fuel for your coasting sections
> so if you can accelerate, admittedly buring more fuel than in a
> steady state cruise, for a short time say 15 seconds from 50 to
> 65 MPH on the freeway, then you coast for 45 seconds from 65 to
> 50 MPH.
See, that's the thing. If I coast in gear (so that fuel consumption is zero), going from 65 to 50 mph will take 15 seconds, not 45. So I don't think that will really save me gas compared to just cruising with constant speed.
The real hardcore pulse&glide people suggest to put the car in neutral and completely turn off ignition during the 'glide' phase, but to me, that's not only illegal (in some states) but also dangerous - you lose your power brakes and power steering. Plus the added wear&tear on your started/alternator.
posted by Pete7874 January 13, 2009 at 12:27 PM
Mileage icon for displaying on other forums/boards?
Any progress on this? Thanks.
posted by Pete7874 September 13, 2008 at 2:02 PM
Good Idea, but This Website Has Many Shortcomings
Agree about the import feature. I was able to export all my historical data from spritmonitor.de and import it into Fuelly.com. No big deal. You just need to RTFM. :)
posted by Pete7874 September 11, 2008 at 11:41 AM
Mileage icon for displaying on other forums/boards?
Cool. Glad you guys are thinking about it. Is there a timeline on this?
posted by Pete7874 September 5, 2008 at 1:48 PM
