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Joined: 20 Mar 2006
Posts: 1273
Location: Kent (East Hill), WA

PostPosted: Sun Dec 09, 2007 10:02 pm    Post subject: Idlers Reply with quote

After getting my EGR valve fixed, I'm immediately seeing fuel efficiency gains. I'll report back on the total when I fill up -- I'm tracking my miles.

But I was just thinking...the main efficiency of a hybrid seems to be that it's designed to be stuck in traffic. Because it can run the electric engine, it doesn't matter if it's not moving, because it's not "idling". However, the cost of that is that you have to have two engines, a gas and an electric.

Well...I thought...first off, does idling use a lot of energy?

Yes. Almost 18% -- and maybe more depending on driving habits:

So, taking a fuel efficient regular gas car, at 35 mpg, if you could eliminate the idle, as a hybrid does, you then get nearly 42 mpg -- or hydrid level efficiency (maybe more).

There are some esoteric ideas:

But as one of the comments in the above article states, if we could just build a switch that turns the car off when its at a stop sign, we'd get the same efficiencies...maybe the same as a hybrid, but without all the complexity.
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