US4819187A
Expired / Lapsed
US
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System for integrally controlling automatic transmission and engine
Assignee: Toyota Motor Corp
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Filing: 1986-12-23
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Granted: 1989-04-04
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Expires: 2006-12-23
Abstract
Abstract A system for integrally controlling an automatic transmission and an engine, wherein gear stages are automatically switched in accordance with a preset shift map, and an engine torque is changed by a predetermined change value during shifting to thereby maintain the satisfactory shift characteristics. The system includes a device for determining whether or not an engine torque change can be actually carried out without a problem; and means for regulating said engine torque change when said engine torque change cannot be actually carried out, to thereby prevent the problem from occurring.
Inventors
- 👤 Hideki Yasue
- 👤 Kagenori Fukumura
- 👤 Kunihiro Iwatsuki
- 👤 Yoshio Shindo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:50
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; F16H2061/1208; F16H2061/1224; F16H2061/124; F16H2061/1256; F16H2061/1284; F16H2306/00; F16H2306/40; F16H2306/42; F16H59/00; F16H59/14; F16H59/24; F16H59/74; F16H59/78
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
129 words
A system for integrally controlling an automatic transmission and an engine, wherein gear stages are automatically switched in accordance with shift points in a preset shift map, and an engine torque is changed by a predetermined change value during shifting to thereby maintain satisfactory shift characteristics, comprising: processor means for controlling the engine torque change by the predetermined change value during shifting, the processor means including means for determining whether conditions exist such that said engine torque cannot be changed in accordance with said predetermined change value; and means for regulating said engine torque change when said conditions are determined to exist, said regulating means including means for changing the shift points of said preset shift map to lower the shift points when the engine torque change is regulated.
Claim 2
Independent Claim
129 words
A system for integrally controlling an automatic transmission and an engine, wherein gear stages are automatically switched in accordance with shift points in a preset shift map, and an engine torque is changed by a predetermined change value during shifting to thereby maintain satisfactory shift characteristics, comprising: processor means for controlling the engine torque change by the predetermined change value during shifting, the processor means including means for determining whether conditions exist such that said engine torque cannot be changed in accordance with said predetermined change value; and means for regulating said engine torque change when said conditions are determined to exist, said regulating means including means for changing the shift points of said preset shift map to lower the shift points when the engine torque change is regulated.
Claim 3
Dependent Claim
58 words
The system as set forth in claim 1, further comprising: a sensor system for determining a timing for said engine torque change; and means for detecting malfunctions in said sensor system; wherein upon detection of a malfunction in said sensor system, conditions are determined to exist in said determining means such that said engine torque cannot be changed.
Claim 4
Dependent Claim
46 words
The system as set forth in claim 1, further comprising: means for detecting operating temperatures of said engine; wherein upon detection of a low operating temperature of said engine, conditions are determined to exist in said determining means such that said engine torque cannot be changed.
Claim 5
Dependent Claim
65 words
The system as set forth in claim 1, further comprising: means for counting the number of torque changes of said engine; wherein upon detection of the counted number of torque changes of said engine which exceeds a predetermined number of torque changes in a specific period of time, conditions are determined to exist in said determining means such that said engine torque cannot be changed.
Claim 6
Dependent Claim
56 words
The system as set forth in claim 1, further comprising: means for detecting an elapsed time after said engine torque change; wherein upon detection that an elapsed time after said engine torque change has not reached a predetermined time, conditions are determined to exist in said determining means such that said engine torque cannot be changed.
Claim 7
Dependent Claim
63 words
The system as set forth in claim 1, further comprising: means for detecting a time interval between said engine torque changes; wherein upon detection that engine torque changes at a time interval shorter than a predetermined period of time are continuously carried out a predetermined number, conditions are determined to exist in said determining means such that said engine torque cannot be changed.
Claim 8
Dependent Claim
45 words
The system as set forth in claim 1, further comprising: means for determining whether or not said engine is overheated; wherein upon detection of overheating of said engine, conditions are determined to exist in said determining means such that said engine torque cannot be changed.
Claim 9
Dependent Claim
35 words
The system as set forth in claim 7, wherein said means for determining whether or not said engine is overheated include means for determining whether or not engine cooling water temperature reaches a predetermined value.
Claim 10
Dependent Claim
25 words
The system as set forth in claim 1, wherein said means for regulating said engine torque change include means for prohibiting said engine torque change.
Claim 11
Dependent Claim
25 words
The system as set forth in claim 1, wherein said means for regulating said engine torque change include means for controlling said predetermined change value.
Claim 12
Dependent Claim
31 words
The system as set forth in claim 1, wherein said means for regulating said engine torque change include means for reducing a period of time for performing said engine torque change.
Claim 13
Dependent Claim
32 words
The system as set forth in claim 1, wherein said means for regulating said engine torque change include means for changing performing regions in various parameters for performing said engine torque change.
Claim 14
Dependent Claim
18 words
The system as set forth in claim 12, wherein one of said various parameters is an engine load.
Claim 15
Dependent Claim
19 words
The system as set forth in claim 12, wherein one of said various parameters is the type of shifting.
Claim 16
Dependent Claim
44 words
The system as set forth in claim 3, further comprising: overdrive cancel means for prohibiting an overdrive when the temperature of said engine is low; wherein said means for regulating said engine torque change include means responsive to a signal for prohibiting said overdrive.
Claim 17
Dependent Claim
22 words
The system as set forth in claim 1, further comprising: means for issuing a warning when said engine torque change is regulated.
Claim 18
Dependent Claim
43 words
The system as set forth in claim 16, further comprising: means for recognizing a reason why said engine torque cannot be changed in accordance with said predetermined change value; wherein said means for issuing the warning issues a warning identifying said recognized reason.
Claim 19
Dependent Claim
26 words
The system as set forth in claim 1, wherein said means for changing shift points to lower shift points include means for selecting another shift map.
Claim 20
Dependent Claim
40 words
The system as set forth in claim 1, further comprising: timer reasons for counting a predetermined period of time; and means for causing the regulation of said engine torque change to continue at least for said predetermined period of time.
Claim 21
Dependent Claim
141 words
The system for integrally controlling an automatic transmission and an engine as set forth in claim 1, further comprising: means for controlling said engine; means for controlling said automatic transmission, said automatic transmission control means being separate from said engine control means; input means for inputting shift information from said automatic transmission control means to said engine control means, and means for performing engine torque change control, said inputting and performing means being formed integrally with said engine control means; and at least one of first and second information transmitting means, said first information transmitting means informing said automatic transmission control means that said engine torque change is stopped or restricted by said engine control means, and said second information transmitting means informing said engine control means that a signal sensor system for performing said engine torque change control has malfunctioned.
Claim 22
Dependent Claim
28 words
The system as set forth in claim 20, further comprising: means for issuing a warning responsive to information from one of said first and second information transmitting means.
References Cited (Backward Citations)
US3895541A
Cited
US4208929A
Cited
US4262335A
Cited
US4355550A
Cited
US4266447A
Cited
US4370903A
Cited
JPS5635857A
Cited
US4403527A
Cited
JPS5639925A
Cited
US4523281A
Cited
US4543934A
Cited
US4556942A
Cited
US4635508A
Cited
US4643048A
Cited
US4703428A
Cited
US4690017A
Cited
US4688450A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |