One way to approach it would be to use a look up table of measured vehicle energy per mile, and google maps (courtesy of USGS). The driver would be required to enter their destination. Present location would be read from a GPS. A proposed route map would appear on the screen, which the driver could modify as desired. The system would then compute the energy per mile required for each step, say 1/4 mile, of the route using elevation changes from the topo map and typical speed limits for type of roadway. The driver could have the option of entering different assumed vehicle speed.
This would give a more accurate estimate than the presently used moving average based on past x miles traveled, but still just an estimate. Myself, I think it is mainly useful for the new driver. After you have driven a given ev for several months you get quite at doing this estimation yourself, particularly if you regularly track Ah or Wh used. I have tracked Ah used by writing them in a 3x5 notebook. Now I can guess quite accurately off the top of my head how many Ah it will take to go to a given destination by looking at the terrain and distance on google maps, and I imagine others here can do the same. -- View this message in context: http://electric-vehicle-discussion-list.413529.n4.nabble.com/Re-EVLN-LEAF-EV-Pack-Reliability-Outperforms-Cynics-Critics-tp4674498p4674534.html Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com. _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
