| 摘要 |
In 31, a torque capacity coefficient τ and the torque ratio t are calculated from the torque converter speed ratio e (turbine speed Nt / engine speed Ne), and Te=τ×Ne2 is calculated. In 32, the engine output Pe=Te×Ne is calculated, in 33, the torque converter total efficiency Et=e×t is calculated, and in 34, the torque converter required output Pt=Pe×Et is calculated. In 35, the speed ratio e(Nt) for each Nt for realizing Pt is calculated, in 36, the torque ratio t(Nt) for each Nt for realizing Pt is calculated, and in 37, the torque converter total efficiency Et(Nt)=e(Nt)×t(Nt) for each Nt for realizing Pt is calculated. In 38, the engine speed Ne(Nt) for each Nt for realizing Pt is calculated. In 39, the engine efficiency Ee(Nt) for each Nt for realizing Pt is calculated. In 41, the power train efficiency Ea(Nt)=Et(Nt)×Ee(Nt) for each Nt for realizing Pt is calculated. In 42, shift control is improved by setting, as the target turbine speed tNt, the turbine speed Nt at which the power train efficiency Ea(Nt) for realizing Pt is maximal. |
