Control apparatus and control method for automatic transmission
AssigneeToyota Jidosha Kabushiki Kaisha
InventorAtsushi Ayabe
Life of this patent
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Abstract
When vehicle speed after determining that a downshift is to be performed is equal to or smaller than first permission vehicle speed VON or second permission vehicle speed VOFF, a controller of an ECT_ECU controls an automatic transmission so that the downshift is performed. When the vehicle speed after determining that the downshift is to be performed is larger than first permission vehicle speed VON or second permission vehicle speed VOFF, a first inhibitor inhibits the downshift.
Claims18
A control apparatus for an automatic transmission installed in a vehicle, comprising:
- a sensor to detect vehicle speed;
- and
- a control unit, wherein
- said control unit:
- determines whether or not a downshift is to be performed in accordance with the vehicle speed;
- determines whether or not the vehicle speed after determining that the downshift is to be performed is equal to or smaller than a predetermined threshold value;
- controls said automatic transmission so that the downshift is performed in a case where the vehicle speed after determining that the downshift is to be performed is equal to or smaller than said threshold value;
- and
- inhibits the downshift in a case where the vehicle speed after determining that the downshift is to be performed is larger than said threshold value.
A control method for an automatic transmission installed in a vehicle, comprising the steps of:
- determining whether or not a downshift is to be performed in accordance with vehicle speed;
- determining whether or not the vehicle speed after determining that the downshift is to be performed is equal to or smaller than a predetermined threshold value;
- controlling said automatic transmission so that the downshift is performed in a case where the vehicle speed after determining that the downshift is to be performed is equal to or smaller than said threshold value;
- and
- inhibiting the downshift in a case where the vehicle speed after determining that the downshift is to be performed is larger than said threshold value.
A control apparatus for an automatic transmission installed in a vehicle, comprising:
- means for determining whether or not a downshift is to be performed in accordance with vehicle speed;
- means for determining whether or not the vehicle speed after determining that the downshift is to be performed is equal to or smaller than a predetermined threshold value;
- means for controlling said automatic transmission so that the downshift is performed in a case where the vehicle speed after determining that the downshift is to be performed is equal to or smaller than said threshold value;
- and
- means for inhibiting the downshift in a case where the vehicle speed after determining that the downshift is to be performed is larger than said threshold value.
Dependencies are inferred from the claim text.