88nova -
Looks like aggressive DFCO (Deceleration Fuel Cut-Off) :
http://www.fuelsmart.info/images/Fue...-CYL113011.pdf
Quote:
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When the microprocessor senses that you no longer want to accelerate, it only allows a certain number of fuel injectors to work and thus saves you fuel. The number of fuel injectors that are deactivated is based upon the rate of deceleration, engine rpm, unit settings, etc. This number is constantly changing to save you the maximum amount of fuel without turning on any check engine lights or causing the engine to excessively run rough.
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I am guessing that if you had an older fuel injected car then it would help, but a new car would probably be doing a lot of this for you.
PS - On the site I found a 2004 EPA PDF on mild hydraulic hybrids (Old Mech!) :
http://www.fuelsmart.info/images/420r04002.pdf
CarloSW2