Hybrid Car – More Fun with Less Gas

Curious warm-up behavior

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Posted by Bob & Holly Wilson on November 3, 2007, 11:00 pm
Using a Graham scanner, I've been looking at the O(2) trim, which
appears to be a good indication of when the vehicle is throughly warmed
up. Even using a block heater, the warm-up interval to a quasi-stable,
zero-centered mixture appears to be about 30-35 minutes. Although the
block heater lets the ICE reach S4 a little quicker, about 5 minutes,
zero-centered mixture trim takes longer.

Bob Wilson

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