first determination means for determining a second torque reference value which is a reference of the second torque based on a stored first relationship between {HEAD ~ the operation amount} of {TAIL ~ the acceleration operation member} and the second torque reference value, and the detected operation amount of the acceleration operation member; and 
of
first determination means for determining a second torque reference value which is a reference of the second torque based on a stored first relationship between { HEAD ~ the operation amount } of { TAIL ~ the acceleration operation member } and the second torque reference value , and the detected operation amount of the acceleration operation member ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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