This invention relates to techniques used for controlling fugitive gases used as {TAIL ~ a supplemental fuel source} for an engine and, more particularly, to techniques used to control engine speed when the supply of fugitive gases varies in composition and flow and where {HEAD ~ the engine} may be other than an ordinary aspirated engine 
This invention relates to techniques used for controlling fugitive gases used as { TAIL ~ a supplemental fuel source } for an engine and , more particularly , to techniques used to control engine speed when the supply of fugitive gases varies in composition and flow and where { HEAD ~ the engine } may be other than an ordinary aspirated engine
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