Hi - Or, a buzzer can be used which sounds when the ignition is turned off, and the fuel valve switch is left in the SVO position. If that happens, then the user simply restarts and purges for few minutes - as a backup warning system, not the primary strategy!
It is simple and effective. The user normally gets into the habit of switching back to diesel shortly before arriving at the destination, so this is just if there is a lapse in that habit. Switching over (from diesel to SVO) is seldom a problem - users are very desirous of getting off diesel and onto SVO as soon as possible, so they do not forget to do so very often! The timing of this varies with system and with ambient temperature. Electric heaters on the SVO heating system (let's say in combination with coolant-operated heating) greatly shorten the time for being able to switch, since the coolant does not have to be at full temperature. So, trying to set a timer on that end would be very difficult. Others have used turbo timers, etc., but it wastes less fuel and is safer and easier to just get in the habit of switching back (purging) on diesel at a certain distance away from the last stop of the day, and having a buzzer for a backup reminder, IMHO. The purge time also varies with ambient temperature, and whether or not a block heater or other preheating is used prior to restart. If you have an older engine with a weak battery and poor compression, and it's quite cold out, you have very poor conditions for getting the engine to start, and so that engine would be *very * difficult to start on SVO (there are other factors, as well, this is just an example). So, purge time would need to be longer - it would need a very thorough purge. If you have, conversely, a new engine, synthetic lube oil, a good battery, and a block heater on it, then the engine would start even with a high percentage of vegoil left in the mix. Again, just examples, but the main point is that this is all over the map (no GIS pun intended!) and therefore very difficult to automate, and may not be worthwhile. As a suggestion, a great application for the GIS would be an international database of places a person can obtain good SVO/WVO....co-ops, cooperative restaurants, stations, bulk dealers, etc. Online, updated, as a nice GIS map....I think that would be a welcome resource in many countries! Edward Beggs http://www.biofuels.ca On Sunday, May 16, 2004, at 02:17 PM, Van Blarcom for Whitsunday wrote: > Ahoy > > Large ships use one fuel to maneuver and another (cheaper) to cruise > at sea. The change-over takes a couple of minutes depending on the > engine. If you stall the engine without changing over it can't be > restarted without bleeding and changing the fuel. > > Many diesels with a turbocharger have a time delay before the engine > shuts down (so it cools and lubricates). Why not incorporate something > of this nature to ensure fuel switchover before shut down. > > Cap'n Dan, > Ship Master > Whitsunday -- Heart of Australia's Great Barrier Reef > > > > > ----- Original Message ----- > From: Martin Klingensmith > To: biofuel@yahoogroups.com > Sent: Saturday, May 15, 2004 12:23 PM > Subject: Re: [biofuel] SVO and Vehicle Navigation Systems > > > Sounds good, but how many people would remember to set their > destination > point in the computer? > You could, however, arrange it to make it start on dino, switch over > 10 > minutes later, cruise for however long, and when the driver goes to > shut > down the car on SVO [oops!] have the computer switch back to dino and > leave the car on for a minute or three. > I work with microcontrollers all the time. It would be fairly > inexpensive. > -- > -- > Martin Klingensmith > http://infoarchive.net/ > http://nnytech.net/ > > Ryan Morgan wrote: >> Here's a brain storm for you: >> >> I work in GIS, for those of you who aren't yet familiar with that, it >> stands >> for Geographic Information Systems. Essentially I make maps and use >> things >> like aerial photography and GPS to do so. Hanging out at my local >> map store >> on a Friday evening (what a dork) I got to talking with another >> mapper about >> his VW TDI and biodiesel. He wasn't too clear on what biodiesel was >> (he >> thought it was just filtered SVO) so I started explaining how SVO >> required >> two tanks and a switch. I told him how the driver had to start on >> dino/biodiesel, switch to SVO, and then remember to switch it back >> before >> turning the motor off. We both agreed that this was too much to >> remember >> for the driving masses, and bingo! It hit me. Why not hook the >> switch to >> an in-vehicle navigation system? >> >> Believe it or not, this would not be difficult to do. The driver >> gets in >> the vehicle, sets a route, and the car knows when it's a quarter mile >> away >> from it's destination and switches back to dino/biodiesel >> automatically. >> What do you think? >> >> Cheers, >> >> Ryan >> >> > > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > > Biofuels list archives: > http://infoarchive.net/sgroup/biofuel/ > > Please do NOT send Unsubscribe messages to the list address. > To unsubscribe, send an email to: > [EMAIL PROTECTED] > > > Yahoo! Groups Sponsor > ADVERTISEMENT > > > > > > ----------------------------------------------------------------------- > ------- > Yahoo! Groups Links > > a.. To visit your group on the web, go to: > http://groups.yahoo.com/group/biofuel/ > > b.. To unsubscribe from this group, send an email to: > [EMAIL PROTECTED] > > c.. Your use of Yahoo! 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