US5311794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for engines and automatic transmissions
Assignee: Toyota Motor Corp
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Filing: 1992-10-28
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Granted: 1994-05-17
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Expires: 2012-10-28
Abstract
Abstract A control system for controlling both: an engine having a plurality of cylinders, a plurality of intake ports formed individually for the cylinders, a plurality of intake valves for opening or closing the intake ports individually for the cylinders, and a control valve for opening or closing one of the intake ports of each of the cylinders; and an automatic transmission connected to the engine. The control system comprises: a valve controller for opening the control valve, when an engine load is high, and for closing the control valve when the engine load is low; an air/fuel ratio controller for making an air/fuel ratio when the control valve is closed higher than that when the control valve is open; and a shift inhibitor for inhibiting the shift in the automatic transmission till a predetermined time period elapses after the switching of the control valve.
Inventors
- 👤 Mitsuru Takada
- 👤 Jun Harada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:03
CPC Classifications
B; B60; B60W; B60W10/00; B60W10/04; B60W10/06; B60W10/10; B60W10/11; B60W30/00; B60W30/18; B60W30/1819; F; F16; F16H; F16H61/00; F16H61/04; F16H61/0437; F16H61/16; F16H59/00; F16H59/74; F16H61/06; F16H61/065; F16H61/067; F16H63/00; F16H63/40; F16H63/50; F16H63/502; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40; Y02T10/80; Y02T10/84
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
141 words
A control system for controlling both: an engine having a plurality of cylinders, a plurality of intake ports formed individually for said cylinders, a plurality of intake valves for opening or closing said intake ports individually for said cylinders, and a control valve for opening or closing one of the intake ports of each of said cylinders; and an automatic transmission connected to said engine, comprising: valve control means for opening said control valve, when an engine load is high, and for closing said control valve when the engine load is low; air/fuel ratio control means for making an air/fuel ratio when said control valve is closed higher than that when said control valve is open; and shift inhibit means for inhibiting the shift in said automatic transmission till a predetermined time period elapses after the switching of said control valve.
Claim 2
Dependent Claim
141 words
A control system for controlling both: an engine having a plurality of cylinders, a plurality of intake ports formed individually for said cylinders, a plurality of intake valves for opening or closing said intake ports individually for said cylinders, and a control valve for opening or closing one of the intake ports of each of said cylinders; and an automatic transmission connected to said engine, comprising: valve control means for opening said control valve, when an engine load is high, and for closing said control valve when the engine load is low; air/fuel ratio control means for making an air/fuel ratio when said control valve is closed higher than that when said control valve is open; and shift inhibit means for inhibiting the shift in said automatic transmission till a predetermined time period elapses after the switching of said control valve.
Claim 3
Dependent Claim
53 words
A control system according to claim 1, wherein said automatic transmission includes friction means to be engaged by an oil pressure, and wherein said predetermined time period is determined in accordance with a time period required for a change of the oil pressure accompanying the switching of said control valve to be completed.
Claim 4
Dependent Claim
36 words
A control system according to claim 1, wherein said automatic transmission includes friction means to be engaged by an oil pressure, and wherein said predetermined time period has a duration determined according to an oil temperature.
Claim 5
Dependent Claim
92 words
A control method of controlling both: an engine having a plurality of cylinders, a plurality of intake ports formed individually for said cylinders, a plurality of intake valves for opening or closing said intake ports individually for said cylinders, and a control valve for opening or closing one of the intake ports of each of said cylinders; and an automatic transmission connected to said engine, wherein the improvement resides in that a shift of said automatic transmission is inhibited till a predetermined time period elapses after the switching of said control valve.
Claim 6
Dependent Claim
92 words
A control method of controlling both: an engine having a plurality of cylinders, a plurality of intake ports formed individually for said cylinders, a plurality of intake valves for opening or closing said intake ports individually for said cylinders, and a control valve for opening or closing one of the intake ports of each of said cylinders; and an automatic transmission connected to said engine, wherein the improvement resides in that a shift of said automatic transmission is inhibited till a predetermined time period elapses after the switching of said control valve.
References Cited (Backward Citations)
JPH0374225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-16 | 1997-11-15 | 1998-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-16 | 2001-11-15 | 2002-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-16 | 2005-11-15 | 2006-05-17 | $7700.00 | Window Closed / Lapsed |