Quote:
Originally Posted by Pete156
Well let me tell you something, you will die if you do so! As long as the engine is "running", it is burning fuel.
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http://en.wikipedia.org/wiki/Energy-...ing_or_gliding
Quote:
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When coasting with the engine running and manual transmission in neutral, or clutch depressed, there will still be some fuel consumption due to the engine needing to maintain idle engine speed. While coasting with the engine running and the transmission in gear, most cars' engine control unit with fuel injection will cut off fuel supply, and the engine will continue running, being driven by the wheels.
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The technology has been around for at least 20 years. You bet your ass the fuel injectors stop injecting fuel when coasting in gear, or at least a
significantly reduced amount.
Here's a paper from 2009 where the abstract talks about how (5 years ago) modern vehicles use almost zero fuel whilst coasting:
http://papers.sae.org/2009-01-0416/
I tried to find the original paper proving fuel shutoff was possible and beneficial but no luck.