Patent US4811223A successfully refreshed from Google Patents.
US4811223A
Expired / Lapsed
US
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System for controlling engine torque
Assignee: Toyota Motor Corp
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Filing: 1986-06-03
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Granted: 1989-03-07
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Expires: 2006-06-03
Abstract
Abstract A system for controlling an engine torque is provided, wherein the engine torque is changed by predetermined values when an automatic transmission is shifting to satisfactorily maintain the shift characteristics of an automatic transmission. An operating area for controlling the engine torque change and/or the predetermined values are corrected in accordance with temperature in an exhaust system of engine, or the frequency of the engine torque change. As a result, rise in temperature in the exhaust system, worsened fuel consumption rate and deteriorated contents of exhaust gas, which are caused due to the frequent torque changes can be avoided.
Inventors
- 👤 Kunihiro Iwatsuki
- 👤 Yoshio Shindo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:46
CPC Classifications
B; B60; B60W; B60W30/00; B60W30/18; B60W10/00; B60W10/04; B60W10/10; B60W10/11; B60W30/1819; F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1438; F02D41/1444; F02D41/1446; F16; F16H; F16H59/00; F16H59/74; F16H2059/743; F16H59/60; F16H59/62; F16H59/64; F16H59/68; F16H59/72; F16H59/78; F16H63/00; F16H63/40; F16H63/50; F16H63/502
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
129 words
A system for controlling an engine torque, wherein said engine torque is changed by predetermined values when an automatic transmission is shifting to satisfactorily maintain the shift characteristics of said automatic transmission, said system comprising: means for detecting a temperature in an exhaust system of said engine; and processor means for controlling the engine torque change, said processor means including means for determining an operation area of the engine torque change, and means for correcting at least one of said operating area of the engine torque change and said predetermined value wherein engine torque change control during shifting is controlled so that a further rise in temperature in the exhaust system is inhibited, when said temperature in the exhaust system of the engine is higher than a reference value.
Claim 2
Independent Claim
129 words
A system for controlling an engine torque, wherein said engine torque is changed by predetermined values when an automatic transmission is shifting to satisfactorily maintain the shift characteristics of said automatic transmission, said system comprising: means for detecting a temperature in an exhaust system of said engine; and processor means for controlling the engine torque change, said processor means including means for determining an operation area of the engine torque change, and means for correcting at least one of said operating area of the engine torque change and said predetermined value wherein engine torque change control during shifting is controlled so that a further rise in temperature in the exhaust system is inhibited, when said temperature in the exhaust system of the engine is higher than a reference value.
Claim 3
Dependent Claim
25 words
The system as set forth in claim 1, wherein said correction of said operating area is performed in accordance with at least an engine load.
Claim 4
Dependent Claim
26 words
The system as set forth in claim 1, wherein said correction of said operating area is performed in accordance with at least a type of shifting.
Claim 5
Dependent Claim
25 words
The system as set forth in claim 1, wherein said correction of said operating area is performed in accordance with at least a vehicle speed.
Claim 6
Dependent Claim
27 words
The system as set forth in claim 1, wherein two said reference values are provided and hysteresis is provided when said correction is started and released, respectively.
Claim 7
Dependent Claim
27 words
The system as set forth in claim 2, wherein two said reference values are provided and hysteresis is provided when said correction is started and released, respectively.
Claim 8
Dependent Claim
27 words
The system as set forth in claim 3, wherein two said reference values are provided and hysteresis is provided when said correction is started and released, respectively.
Claim 9
Dependent Claim
27 words
The system as set forth in claim 4, wherein two said reference values are provided and hysteresis is provided when said correction is started and released, respectively.
Claim 10
Independent Claim
125 words
A system for controlling an engine torque, wherein said engine torque is changed by predetermined values when an automatic transmission is shifting to satisfactorily maintain the shift characteristics of said automatic transmission, said system comprising: processor means for controlling the engine torque change, said processor means including means for determining an operating area of said engine torque change; means for detecting a frequency of said engine torque change; and means for correcting at least one of said operating area of the engine torque change and said predetermined value whereby engine torque change control during shifting is controlled so that a further rise in temperature of an exhaust system for the vehicle is inhibited when said frequency of the engine torque change exceeds a reference value.
Claim 11
Independent Claim
125 words
A system for controlling an engine torque, wherein said engine torque is changed by predetermined values when an automatic transmission is shifting to satisfactorily maintain the shift characteristics of said automatic transmission, said system comprising: processor means for controlling the engine torque change, said processor means including means for determining an operating area of said engine torque change; means for detecting a frequency of said engine torque change; and means for correcting at least one of said operating area of the engine torque change and said predetermined value whereby engine torque change control during shifting is controlled so that a further rise in temperature of an exhaust system for the vehicle is inhibited when said frequency of the engine torque change exceeds a reference value.
Claim 12
Dependent Claim
25 words
The system as set forth in claim 9, wherein said correction of the operating area is performed in accordance with at least an engine load.
Claim 13
Dependent Claim
26 words
The system as set forth in claim 9, wherein said correction of the operating area is performed in accordance with at least a type of shifting.
Claim 14
Dependent Claim
25 words
The system as set forth in claim 9, wherein said correction of the operating area is performed in accordance with at least a vehicle speed.
Claim 15
Dependent Claim
27 words
The system as set forth in claim 9, wherein two said reference values are provided and hysterresis is provided when said correction is started and released, respectively.
Claim 16
Dependent Claim
27 words
The system as set forth in claim 10, wherein two said reference values are provided and hysteresis is provided when said correction is started and released, respectively.
Claim 17
Dependent Claim
27 words
A system as set forth in claim 11, wherein two said reference values are provided and hysteresis is provided when said correction is started and released, respectively.
Claim 18
Dependent Claim
27 words
A system as set forth in claim 12, wherein two said reference values are provided and hysteresis is provided when said correction is started and released, respectively.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |