| 摘要 |
<P>PROBLEM TO BE SOLVED: To more properly estimate a road surface gradient, and to more properly perform control using the estimated road surface gradient. <P>SOLUTION: When prescribed conditions under which control using an estimated road surface gradient θ can be performed are established, and previous request torque Tr* is less than a threshold Tref based on various restrictions such as equipment and device, the estimated road surface gradient θ is set on the basis of the previous request torque Tr* and acceleration α of a vehicle (S120 to 140), and when the prescribed conditions are not established, and the previous request torque Tr* is equal to or more than the threshold Tref, the estimated road surface gradient θ set until that time is stored. Thus, the estimated road surface gradient θ is more properly set. Then, an engine and two motors are controlled so that the vehicle can travel by the request torque Tr* by using the set estimated road surface gradient θ. Consequently, control is more properly performed using the set estimated road surface gradient θ. <P>COPYRIGHT: (C)2009,JPO&INPIT |
