Shift control device and shift control method for automatic transmission
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsSeiji Kuwahara, Hideaki Otsubo, Masato Kaigawa, Masayuki Baba
Life of this patent
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Abstract
An electronic control unit is provided with two types of gear change maps: a first gear change map based on the vehicle speed and the accelerator pedal operation amount; and a second gear change map based on the vehicle speed and the required drive force of the vehicle. The electronic control unit determines whether the automatic transmission should downshift with reference to the first gear change map, and determines whether the automatic transmission should upshift with reference to the second gear change map.
Claims8
1-6. (canceled)
A shift control device that determines whether an automatic transmission should change gear, comprising:
- a first gear change determination section that determines whether the automatic transmission should change gear based on a vehicle speed and an accelerator pedal operation amount or based on the vehicle speed and a throttle opening degree;
- and
- a second gear change determination section that determines whether the automatic transmission should change gear based on the vehicle speed and a load on an internal combustion engine or based on the vehicle speed and a required drive force of the vehicle, wherein:
- the first gear change determination section that is used to determine whether the automatic transmission should downshift;
- and
- the second gear change determination section that is used to determine whether the automatic transmission should upshift.
A shift control method for determining whether an automatic transmission mounted on a vehicle should change gear, comprising:
- determining whether the automatic transmission should downshift based on a vehicle speed and an accelerator pedal operation amount or based on the vehicle speed and a throttle opening degree;
- and
- determining whether the automatic transmission should upshift based on the vehicle speed and a load on an internal combustion engine or based on the vehicle speed and a required drive force of the vehicle.
Dependencies are inferred from the claim text.