Shift control apparatus and method for automatic transmission of vehicle
First Claim
1. A shift control apparatus for an automatic transmission for a vehicle, the automatic transmission having an automatic shift mode in which the automatic transmission is automatically shifted using an entire shift range of the automatic transmission in a predetermined shift manner and a manual shift mode in which the shift range of the automatic shifting that is performed in the predetermined shift manner is limited in response to a manual operation of a driver, the automatic shift mode and the manual shift mode being selectable by the driver, the shift control apparatus comprising:
- a shift manner changing portion that changes the shift manner based on at least one of a running condition of a vehicle and an operation by the driver; and
a change limiting portion that prohibits the shift manner to be changed by the shift manner changing portion, whereinthe shift manner changing portion changes the shift manner in both the automatic shift mode and the manual shift mode, andthe change limiting portion prohibits the shift manner to be changed by the shift manner changing portion when a speed of the vehicle is equal to or higher than a reference vehicle speed in the manual shift mode.
1 Assignment
0 Petitions
Accused Products
Abstract
When a n speed prohibition command is being output from the AI shift controlling means, the AI shift control is performed even in the S mode if the vehicle speed V is lower than the reference vehicle speed Vn, whereby busy shifting can be effectively prevented when the vehicle is running on an uphill road or cornering. When the vehicle speed V is equal to or higher than the reference vehicle speed Vn, the AI shift control is cancelled, thus minimizing the possibility of a large engine brake force being applied to the vehicle despite the intention of the driver.
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Citations
8 Claims
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1. A shift control apparatus for an automatic transmission for a vehicle, the automatic transmission having an automatic shift mode in which the automatic transmission is automatically shifted using an entire shift range of the automatic transmission in a predetermined shift manner and a manual shift mode in which the shift range of the automatic shifting that is performed in the predetermined shift manner is limited in response to a manual operation of a driver, the automatic shift mode and the manual shift mode being selectable by the driver, the shift control apparatus comprising:
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a shift manner changing portion that changes the shift manner based on at least one of a running condition of a vehicle and an operation by the driver; and a change limiting portion that prohibits the shift manner to be changed by the shift manner changing portion, wherein the shift manner changing portion changes the shift manner in both the automatic shift mode and the manual shift mode, and the change limiting portion prohibits the shift manner to be changed by the shift manner changing portion when a speed of the vehicle is equal to or higher than a reference vehicle speed in the manual shift mode. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A shift control method for an automatic transmission for a vehicle, the automatic transmission having an automatic shift mode in which the automatic transmission is automatically shifted using an entire shift range of the automatic transmission in a predetermined shift manner and a manual shift mode in which the shift range of the automatic shifting that is performed in the predetermined shift manner is limited in response to a manual operation of a driver, the automatic shift mode and the manual shift mode being selectable by the driver, the shift control method comprising:
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changing the shift manner in both the automatic shift mode and the manual shift mode based on at least one of a drive condition of a vehicle and an operation by the driver; and prohibiting the shift manner to be changed when a speed of the vehicle is equal to or higher than a reference vehicle speed in the manual shift mode.
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8. A shift control apparatus for an automatic transmission for a vehicle, the automatic transmission having an automatic shift mode in which the automatic transmission is automatically shifted using an entire shift range of the automatic transmission in a predetermined shift manner and a manual shift mode in which the shift range of the automatic shifting that is performed in the predetermined shift manner is limited in response to a manual operation of a driver, the automatic shift mode and the manual shift mode being selectable by the driver, the shift control apparatus comprising:
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shift manner changing means for changing the shift manner based on at least one of a drive condition of a vehicle and an operation by the driver; and change limiting means for prohibiting the shift manner to be changed by the shift manner changing means, wherein the shift manner changing means changes the shift manner in both the automatic shift mode and the manual shift mode, and the change limiting means prohibits the shift manner to be changed by the shift manner changing means when a speed of the vehicle is equal to or higher than a reference vehicle speed in the manual shift mode.
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Specification