US4838124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for integrally controlling automatic transmission and engine
Assignee: Toyota Motor Corp
•
Filing: 1987-06-22
•
Granted: 1989-06-13
•
Expires: 2007-06-22
Abstract
Abstract In a system for integrally controlling an automatic transmission and an engine wherein engine torque is changed during shifting, it is detected whether or not various communication means provided for carrying out the engine torque change is in a failed state. If so, a shift parameter or parameters in the automatic transmission, such as a shift point and engagement oil pressure, are changed in a direction for securing the durability of frictionally engaging devices. When the shift point is changed, a measured value of factors for determining the shift point is corrected to substantially lower the shift point. With this arrangement, computer capacity can be decreased.
Inventors
- 👤 Yukio Hamano
- 👤 Yuji Kashihara
- 👤 Keita Sakurai
- 👤 Hideki Yasue
- 👤 Kagenori Fukumura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:26
CPC Classifications
B; B60; B60W; B60W10/00; B60W10/04; B60W10/06; B60W10/10; B60W10/11; B60W10/115; B60W30/00; B60W30/18; B60W30/1819; B60W30/19; F; F16; F16H; F16H61/00; F16H61/02; F16H61/0202; F16H61/0204; F16H61/0213; F16H61/12; F16H63/00; F16H63/40; F16H63/50; F16H63/502; F16H59/00; F16H59/02; F16H59/08; F16H2059/082; F16H2059/084; F16H2059/085; F16H2061/1208; F16H2061/1224; F16H2061/1256; F16H2061/1284; F16H61/0021; F16H61/68; F16H61/684; F16H61/686; Y; Y10; Y10S; Y10S477/00; Y10S477/906
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
49 words
d engine torque change; and detecting means for detecting whether or not said communication is in a failed state; wherein, when said communication means are detected to be in the failed state, said detecting means detects that the engine torque change is in a state of being practically changeable.
References Cited (Backward Citations)
US4208929A
Cited
GB2042658A
Cited
JPS5569738A
Cited
US4266447A
Cited
US4370903A
Cited
US4403527A
Cited
GB2156017A
Cited
US4506564A
Cited
US4543934A
Cited
US4635508A
Cited
EP0130811A1
Cited
US4716788A
Cited
EP0227001A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |