| 摘要 |
PURPOSE: To optimize a switching point of gear shift and save fuel by setting the gear ratio by comparing a first signal based on the output revolution of an automatic transmission and/or a second signal based on transmission output torque with a threshold value. CONSTITUTION: When additional load 18 does not apply a load value m- klima to a drive device 11, the output of the engine output speed n- mot generated by an internal combustion engine 11 and the engine output torque mm mot is supplied to a torque converter 12, and the output of the output revolution n- ab of an automatic transmission 13 and the output torque m- ab is applied to a dive wheel 14. In this case, the gear ratio of the automatic transmission 13 is so set that the drive device 11 may be operated in the operating range of the suitable consumption, the gear ratio is set by comparing a first signal based on n- mot and/or a second signal based on m- mot with a threshold value mo- ab- sts, and the threshold value mo- ab- sts is determined by a parameter for controlling maximum torque to be supplied from the drive device 11 to the transmission 13. |
