According to this construction, {TAIL ~ the upper limit guard} is not applied so as to limit {HEAD ~ the valve overlap amount} using the upper limit guard value in this case 
According to this construction , { TAIL ~ the upper limit guard } is not applied so as to limit { HEAD ~ the valve overlap amount } using the upper limit guard value in this case
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH