{HEAD ~ The ignition timing} of {TAIL ~ the internal combustion engine} that is preheated upon or before starting thereof is retarded as compared with the internal combustion engine that is not preheated 
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{ HEAD ~ The ignition timing } of { TAIL ~ the internal combustion engine } that is preheated upon or before starting thereof is retarded as compared with the internal combustion engine that is not preheated
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH