| 摘要 |
PROBLEM TO BE SOLVED: To control speed change so as to maintain always excellent travel performance by changing a part of a low-medium load area of an engine load in the direction for expanding an output rotational speed area to perform a low speed stage of an automatic transmission among a prescribed speed changer pattern when a speed change condition of an auxiliary transmission is put on the low speed side. SOLUTION: When an auxiliary speed change stage is put in a low mode L, a shift pattern SP (a broken line) in a shift map is changed to the large side of output rotational speed V with a point of throttle T openingθTH and T openingθ1 in which an engine becomes maximum output as the origin to SP (a full line) at a high mode H time. Therefore, dependency of speed change on the output rotational speed V is increased, and influence of a change in T openingθTH is made hard to be received, and even if T openingθTH is frequently changed large to a sign B from a sign A, it is not easily shifted up, and a present speed change stage is held until the output rotational speed V increases to a certain degree, and suitable driving torque can be generated. |
