To improve the traveling performance of a vehicle without the shift control of a change gear while reducing a possibility that there may occur an engine stall of the vehicle.
When engine torque detected by an engine torque detector 4 is not smaller than a preset engine torque value, when an acceleration opening detected by an acceleration opening detector 5 is not smaller than a preset acceleration opening, when a gradient of a traveling road face detected by a gradient detector 6 is not smaller than a preset gradient value, when dead weight detected by a dead weight detector 7 is not lighter than a preset dead weight value, and when the number of revolutions of the engine detected by an engine rotation number detector 3 is not larger than the preset number of revolutions of the engine, a control unit (ECU) 2 shifts down a change gear stage of an automatic transmission 12 which has been set.
| JP5767035 | Vehicle speed control structure for work platforms |
| JPH08177541 | ENGINE TORQUE CONTROL DEVICE |
| WO/2013/042259 | CONTINUOUSLY VARIABLE TRANSMISSION |
YAMADA TAKEO
Ryukichi Abe
Takashi Koyama
Teiji Tanaka