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Old 02-01-2012, 09:35 PM   #34 (permalink)
ConnClark
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Join Date: Jun 2008
Location: Richland,WA
Posts: 985

Das Schlepper Frog - '85 Mercedes Benz 300SD
90 day: 23.23 mpg (US)

Gentoo320 - '04 Mercedes C320 4Matic
90 day: 22.44 mpg (US)
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Quote:
Originally Posted by aerohead View Post
I reckon that since transient loads are the least efficient,and steady-state the most efficient,that Honda was killing both birds.
When under acceleration,they were removing some load during this least efficient operation to get the car up to operating velocity,then making up the difference on the battery when the engine was near peak BSFC and would suffer a smaller mpg hit.
The same could have been done with the AC compressor employing a normally-closed vacuum switch which goes open circuit upon loss of manifold vacuum.AC is a major hit with a 60-bhp engine.
So I guess its only a win to use it when your BSFC drops 15% below your average BSFC.
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