IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0036011
(2011-02-28)
|
등록번호 |
US-8463513
(2013-06-11)
|
우선권정보 |
JP-2010-046463 (2010-03-03) |
발명자
/ 주소 |
- Arai, Dai
- Kojima, Hiroyuki
- Nedachi, Yoshiaki
- Tanaka, Masataka
- Tajima, Shigeru
|
출원인 / 주소 |
|
대리인 / 주소 |
Ditthavong Mori & Steiner, P.C.
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
5 |
초록
▼
A transmission control apparatus for an automatic transmission to change a shift position automatically includes a cornering-state judging device, a modified shift-up table generator, and a gear-shift controller. The cornering-state judging device is configured to judge whether a vehicle has transit
A transmission control apparatus for an automatic transmission to change a shift position automatically includes a cornering-state judging device, a modified shift-up table generator, and a gear-shift controller. The cornering-state judging device is configured to judge whether a vehicle has transitioned to a cornering state from a normal running state. The modified shift-up table generator is configured to generate a modified shift-up table when the vehicle is judged to have transitioned to the cornering state. The modified shift-up table makes a shift-up more difficult to occur than a reference shift-up table does. The gear-shift controller is configured to perform gear-shift control by using the reference shift-up table during the normal running state. The gear-shift controller is configured to suppress a gear shift by using the modified shift-up table instead of the reference shift-up table when the vehicle is judged to have transitioned to the cornering state.
대표청구항
▼
1. A transmission control apparatus for an automatic transmission to change a shift position automatically, the transmission control apparatus comprising: a cornering-state judging device configured to judge whether a vehicle has transitioned to a cornering state from a normal running state;a modifi
1. A transmission control apparatus for an automatic transmission to change a shift position automatically, the transmission control apparatus comprising: a cornering-state judging device configured to judge whether a vehicle has transitioned to a cornering state from a normal running state;a modified shift-up table generator configured to generate a modified shift-up table when the vehicle is judged to have transitioned to the cornering state, the modified shift-up table making a shift-up more difficult to occur than a reference shift-up table does;a gear-shift controller configured to perform gear-shift control by using the reference shift-up table during the normal running state, and configured to suppress a gear shift by using the modified shift-up table instead of the reference shift-up table when the vehicle is judged to have transitioned to the cornering state; anda cornering-state judgment map in which a running state of the vehicle is divided into an acceleration range, a cruise range, a deceleration range, and a throttle-off range by using a throttle opening and a vehicle speed as parameters,wherein the cornering-state judging device is configured to judge based on information on the throttle opening and the vehicle speed that the vehicle has transitioned to the cornering state from the normal running state, when the running state of the vehicle enters the cruise range from the acceleration range or when the running state of the vehicle enters the cruise range from the deceleration range. 2. The transmission control apparatus according to claim 1, wherein the reference shift-up table and the cornering-state judgment map are each provided for each of gear positions of the automatic transmission. 3. The transmission control apparatus according to claim 1, wherein the modified shift-up table generator includes the reference shift-up table and a maximum shift-up table in which a shift-up vehicle speed at a throttle opening is set to be higher than a shift-up vehicle speed at the same throttle opening in the reference shift-up table, andwherein the modified shift-up table is formed between the reference shift-up table and the maximum shift-up table in accordance with a displacement factor calculated in accordance with the vehicle speed during cornering, the displacement factor being set to zero when the modified shift-up table is identical to the reference shift-up table and being set to one when the modified shift-up table is identical to the maximum shift-up table. 4. The transmission control apparatus according to claim 2, wherein the modified shift-up table generator includes the reference shift-up table and a maximum shift-up table in which a shift-up vehicle speed at a throttle opening is set to be higher than a shift-up vehicle speed at the same throttle opening in the reference shift-up table, andwherein the modified shift-up table is formed between the reference shift-up table and the maximum shift-up table in accordance with a displacement factor calculated in accordance with the vehicle speed during cornering, the displacement factor being set to zero when the modified shift-up table is identical to the reference shift-up table and being set to one when the modified shift-up table is identical to the maximum shift-up table. 5. The transmission control apparatus according to claim 1, wherein the gear-shift controller is configured to immediately start the gear-shift control using the modified shift-up table when the vehicle is judged to have transitioned to a cornering state, and then to set the modified shift-up table back to the reference shift-up table by continuously modifying the modified shift-up table. 6. The transmission control apparatus according to claim 2, wherein the gear-shift controller is configured to immediately start the gear-shift control using the modified shift-up table when the vehicle is judged to have transitioned to a cornering state, and then to set the modified shift-up table back to the reference shift-up table by continuously modifying the modified shift-up table. 7. The transmission control apparatus according to claim 3, wherein the gear-shift controller is configured to immediately start the gear-shift control using the modified shift-up table when the vehicle is judged to have transitioned to a cornering state, and then to set the modified shift-up table back to the reference shift-up table by continuously modifying the modified shift-up table. 8. The transmission control apparatus according to claim 4, wherein the gear-shift controller is configured to immediately start the gear-shift control using the modified shift-up table when the vehicle is judged to have transitioned to a cornering state, and then to set the modified shift-up table back to the reference shift-up table by continuously modifying the modified shift-up table. 9. The transmission control apparatus according to claim 5, comprising: a displacement-factor holding-time setting device to set a displacement-factor holding time by using a displacement-factor holding-time map, the displacement-factor holding time being a time during which to hold the modified shift-up table generated when the vehicle is judged to have transitioned to a cornering state; anda displacement-factor setting-back-time setting device to set a displacement-factor setting-back time by using a displacement-factor setting-back-time map, the displacement-factor setting-back time being a time required for the modified shift-up table to be continuously modified to the reference shift-up table after elapse of the displacement-factor holding time. 10. The transmission control apparatus according to claim 6, comprising: a displacement-factor holding-time setting device to set a displacement-factor holding time by using a displacement-factor holding-time map, the displacement-factor holding time being a time during which to hold the modified shift-up table generated when the vehicle is judged to have transitioned to a cornering state; anda displacement-factor setting-back-time setting device to set a displacement-factor setting-back time by using a displacement-factor setting-back-time map, the displacement-factor setting-back time being a time required for the modified shift-up table to be continuously modified to the reference shift-up table after elapse of the displacement-factor holding time. 11. The transmission control apparatus according to claim 7, comprising: a displacement-factor holding-time setting device to set a displacement-factor holding time by using a displacement-factor holding-time map, the displacement-factor holding time being a time during which to hold the modified shift-up table generated when the vehicle is judged to have transitioned to a cornering state; anda displacement-factor setting-back-time setting device to set a displacement-factor setting-back time by using a displacement-factor setting-back-time map, the displacement-factor setting-back time being a time required for the modified shift-up table to be continuously modified to the reference shift-up table after elapse of the displacement-factor holding time. 12. The transmission control apparatus according to claim 8, comprising: a displacement-factor holding-time setting device to set a displacement-factor holding time by using a displacement-factor holding-time map, the displacement-factor holding time being a time during which to hold the modified shift-up table generated when the vehicle is judged to have transitioned to a cornering state; anda displacement-factor setting-back-time setting device to set a displacement-factor setting-back time by using a displacement-factor setting-back-time map, the displacement-factor setting-back time being a time required for the modified shift-up table to be continuously modified to the reference shift-up table after elapse of the displacement-factor holding time. 13. A transmission control apparatus for an automatic transmission to change a shift position automatically, the transmission control apparatus comprising: a cornering-state judging device configured to judge whether a vehicle has transitioned to a cornering state from a normal running state;a modified shift-up table generator configured to generate a modified shift-up table when the vehicle is judged to have transitioned to the cornering state, the modified shift-up table making a shift-up more difficult to occur than a reference shift-up table does;a gear-shift controller configured to perform gear-shift control by using the reference shift-up table during the normal running state, and configured to suppress a gear shift by using the modified shift-up table instead of the reference shift-up table when the vehicle is judged to have transitioned to the cornering state;a displacement-factor holding-time setting device to set a displacement-factor holding time by using a displacement-factor holding-time map, the displacement-factor holding time being a time during which to hold the modified shift-up table generated when the vehicle is judged to have transitioned to a cornering state; anda displacement-factor setting-back-time setting device to set a displacement-factor setting-back time by using a displacement-factor setting-back-time map, the displacement-factor setting-back time being a time required for the modified shift-up table to be continuously modified to the reference shift-up table after elapse of the displacement-factor holding time,wherein the gear-shift controller is configured to immediately start the gear-shift control using the modified shift-up table when the vehicle is judged to have transitioned to a cornering state, and then to set the modified shift-up table back to the reference shift-up table by continuously modifying the modified shift-up table. 14. The transmission control apparatus according to claim 13, wherein the displacement-factor holding-time map and the displacement-factor setting-back-time map are each set for each gear position of the automatic transmission. 15. The transmission control apparatus according to claim 14, wherein the transmission control apparatus is configured to perform automatic transmission control while selecting any one of a D mode being suitable for cruising and an S mode having a vehicle speed for gear shift set higher than a vehicle speed for gear shift set in the D mode,wherein upon detection of transition of the vehicle to the cornering state while the D mode is selected, the modified shift-up table is formed based on a D-mode reference shift-up table and a D-mode maximum shift-up table and the displacement-factor holding time and the displacement-factor setting-back time are derived respectively from D-mode maps, andwherein upon detection of transition of the vehicle to the cornering state while the S mode is selected, the modified shift-up table is formed based on an S-mode reference shift-up table and a S-mode maximum shift-up table and the displacement-factor holding time and the displacement-factor setting-back time are derived respectively from S-mode maps.
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