engine condition sensing means provided in {HEAD ~ said internal combustion engine} for detecting {TAIL ~ the operating conditions} of said engine 
for detecting
engine condition sensing means provided in { HEAD ~ said internal combustion engine } for detecting { TAIL ~ the operating conditions } of said engine
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH