{HEAD ~ The air intake passage} is arranged to introduce air to the chamber through a throttle valve for regulating an amount of {TAIL ~ the air} with an opening degree thereof 
{ HEAD ~ The air intake passage } is arranged to introduce air to the chamber through a throttle valve for regulating an amount of { TAIL ~ the air } with an opening degree thereof
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH