guy keren <guy.choo.ke...@gmail.com> writes: > "watching the numbers occasionally" is not a proper experiment. you > need to reset the computer before you start the "drive under test", > and check the value after - and the length should be enough to even > out the fluctuations.
I don't know what your car shows you. Mine directly shows the fuel consumption at the moment (that jumps around) and a running average over some period of time that is updated every few seconds. I don't remember what the averaging period is exactly, but if you drive at a steady speed for a while (I have cruise control, too) you will get a pretty stable number on the screen. These are two different screens on the dashboard that I can switch between with a button on the steering wheel. The computer screen is right next to the speedometer, so I can watch the speed (even without cruise control) and fuel consumption simultaneously. In principle, I think there is another screen that reports your running average speed, but I don't think I used it for this purpose. I don't know what you mean by "resetting" the computer. I assume you reset the "trip distance" counter. I don't even need it to watch the fuel consumption numbers. It sounds like you took a trip with a full tank, guesstimated your average velocity, and topped the tank again to see how much fuel you spent. If I misread, sorry. If this is roughly what you did, then I am sorry to say I am not particularly impressed with the methodology (I realize this is the only thing you may be able to do - no offence meant at all - it is better than nothing). It cannot possibly be close in precision or reliability to direct observation of km/l or l/km. I hope the above gives you a good idea how I know. This is the least "theoretical" approach mentioned so far. All my "occasional observations" disclaimers mean that I didn't obsessively do it over dozens of trips, write down the numbers, run F-tests or whatever... > one thing to note - the car uses more then just fuel to recharge the > battery. every time i leave the accelerator (e.g. when coming to a > traffic light, or due to getting too close to a car in front of me) - > the battery is being recharged. I made a note of it in my very first post. -- Oleg Goldshmidt | p...@goldshmidt.org _______________________________________________ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
