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