The present invention relates to an art of {HEAD ~ control} of an engine having {TAIL ~ a variable series supercharging system} 
The present invention relates to an art of { HEAD ~ control } of an engine having { TAIL ~ a variable series supercharging system }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL