| 摘要 |
PROBLEM TO BE SOLVED: To provide a speed change controller capable of suppressing a speed change shock caused in the case of supplying fuel of a different kind or properties from the same of fuel used prior to the fuel supply when controlling an automatic transmission for transmitting output of a multi-fuel internal combustion engine to a drive shaft of a vehicle. SOLUTION: The speed change controller is connected to the multi-fuel internal combustion engine 40 driven by using at least one of a plurality of kinds of fuels having properties different from one another, and controls the automatic transmission 10 for transmitting the output of the multi-fuel internal combustion engine to the drive shaft of the vehicle via a frictional engagement device engaged or disengaged in response to engagement hydraulic pressure. The speed change controller includes a setting means for changing a speed change hydraulic pressure as the engagement hydraulic pressure at the time of speed changing to a value different from the value before the fuel supply when the fuel is supplied to the vehicle, and a control means for shifting the automatic transmission at the speed change hydraulic pressure. When a shift time during which the automatic transmission is shifted at the changed hydraulic pressure as the speed change hydraulic pressure after a change by the setting means, is shorter than a predetermined time, the control means utilizes the unchanged hydraulic pressure as the speed change hydraulic pressure before change by the setting means in place of the changed hydraulic pressure. COPYRIGHT: (C)2009,JPO&INPIT
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