(if you top-post, so will I! ;)
driving the "old prius" myself (it's actualy the 2nd or 3rd generation
of prius - but who's counting? :) - a few observations:
- the car has its algorithms - but you can "interfere".
- when driving fully down-hill, the car usually turns the engine off,
regardless of EV mode. this is most noticeable when you go down hill at
a high speed (70kmh and above). just get your foot off the accelerator...
- when going down hill, sometimes the prius decides not to turn off the
gasoline engine. in these cases, moving to 'B' causes it to turn off the
gasoline engine (while also avoiding the car accelerating too much). i
use this feature often when leaving home.
- the amount of gasoline the card will use varies greatly with the
driving style and the speed of driving.
some surprising observation: when driving through an "accordion pkak"
(where you keep accelerating to 30-50kmh and then deccelerating back to
10-20kmh and so on) - if done correctly, the Prius consumes the same
amount of fuel per km as it does when driving at ~95kmh fixed speed on a
flat road.
don't be so hard on the engineers behind the prius - just learn to play
along with them.
--guy
On 09/15/2013 05:31 PM, Orna Agmon Ben-Yehuda wrote:
Hi Mord,
You are looking for something like this:community:
http://www.kml.co.il/Models/%D7%98%D7%95%D7%99%D7%95%D7%98%D7%94_%D7%A4%D7%A8%D7%99%D7%95%D7%A1
But you are right that hybrid cars have a lot of user-visible algorithms
in them, and I think this makes it interesting to reverse-engineer.
I think the most important division of hybrid cars is if the electric
engine can be a stand-alone (like Toyota and Lexus) or is just a helper
(like Honda Insight). A stand-alone electric motor will reduce your gas
consumption in traffic jams, and a helper engine will give you
additional boost when needed (instead of getting a larger engine to
begin with).
If you are looking for real efficiency, you want a small car with a
hybrid stand alone engine, which is what the Toyota Yaris gives you.
However, you also need to look into the algorithmics of the car. For
example, the older Prius (2005-2009) would charge its battery when you
are standing, just because it got empty (in case you want to boost your
1.5L engine soon). The B (Break?) gear is also interesting: The old
Prius would just shift into low gear and actually consume more fuel, I
believe, when you go down the mountain (and don't want to burn your
breaks). However, when you slow down or use the B gear, the Lexus
charges the battery more efficiently first, and only if it must -
actually uses the breaks or other wasteful methods (at least in Eco mode).
Another annoying piece of algorithm is that the old Prius refuses to run
in ev mode (just electric motor) if you go above 40 Km/hour. This is
rather stupid if you are just using your current speed to go down the
mountain.
Orna
On Sun, Sep 15, 2013 at 1:42 PM, Mord Behar <mord...@gmail.com
<mailto:mord...@gmail.com>> wrote:
Hi
I know that this is off-topic, but I really don't know who to ask.
See, I need a large pool of Linux-like brains that live in Israel
for this.
I mean, people (like me) who track gas liters and kilometerage, wear
and tear on the car, insurance and things like that.
Does anybody have numbers and experience to show how economical it
is to buy a hybrid car, and which one?
At what point of city-driving and non-city-driving does it pay to
buy a hybrid car? Gas is really expensive now, and probably just
going to go up. But hybrid cars are expensive too and the shelf life
of the battery is 5-10 years...
And I suppose that the terrain matters as well. In Jerusalem the
hybrid car will use more gasoline than in Tel Aviv.
Thanks.
P.S.
Mods, if you remove this message I totally understand, but could you
please point me somewhere else instead?
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--
Orna Agmon Ben-Yehuda.
http://ladypine.org
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