US4848086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boost pressure control method for a supercharged internal combustion engine
Assignee: Honda Motor Co Ltd
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Filing: 1987-11-18
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Granted: 1989-07-18
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Expires: 2007-11-18
Abstract
Abstract The boost pressure of a blower such as a turbocharger or a supercharger which is driven by the exhaust gas or the power output from an engine is controlled under closed-loop control when the boost pressure is in a steady state, and under open-loop control when the boost pressure is in a transient state. When the boost pressure is in the transient state, the open-loop control which may be map control is carried out for relatively good accuracy and high stability. When the boost pressure is in the steady state, the closed-loop control, i.e., highly accurate feedback control, is effected. Therefore, an improved response and stability can be achieved in boost pressure control.
Inventors
- 👤 Kazuo Inoue
- 👤 Osamu Kubota
- 👤 Noriyuki Kishi
- 👤 Atsushi Katoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:40
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/12; F02B37/18; F02B37/24; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
83 words
A method of controlling the boost pressure of a blower driven by the exhaust gas or the power output from an engine, comprising the steps of: controlling the boost pressure under closed-loop control when the boost pressure is in a steady state; and controlling the boost pressure under open-loop control when the boost pressure is in a transient state, wherein said open-loop control comprises map control effected on the basis of map values which are updated by data obtained in the closed-loop control.
Claim 2
Independent Claim
83 words
A method of controlling the boost pressure of a blower driven by the exhaust gas or the power output from an engine, comprising the steps of: controlling the boost pressure under closed-loop control when the boost pressure is in a steady state; and controlling the boost pressure under open-loop control when the boost pressure is in a transient state, wherein said open-loop control comprises map control effected on the basis of map values which are updated by data obtained in the closed-loop control.
Claim 3
Independent Claim
102 words
A method of controlling the boost pressure of a blower driven by the exhaust gas or the power output from an engine, comprising the steps of: controlling the boost pressure under closed-loop control when the boost pressure is in a steady state; and controlling the boost pressure under open-loop control when the boost pressure is in a transient state, wherein said open-loop control comprises map control effected on the basis of map values which are updated by data obtained in the closed-loop control, and wherein said map values are updated for each of different temperatures of intake air supplied to the engine.
Claim 4
Independent Claim
102 words
A method of controlling the boost pressure of a blower driven by the exhaust gas or the power output from an engine, comprising the steps of: controlling the boost pressure under closed-loop control when the boost pressure is in a steady state; and controlling the boost pressure under open-loop control when the boost pressure is in a transient state, wherein said open-loop control comprises map control effected on the basis of map values which are updated by data obtained in the closed-loop control, and wherein said map values are updated for each of different temperatures of intake air supplied to the engine.
Claim 5
Independent Claim
83 words
A method of controlling the boost pressure of a blower driven by the exhaust gas or the power output from an engine, comprising the steps of: controlling the boost pressure under closed-loop control when the boost pressure is in a steady state; and controlling the boost pressure under open-loop control when the boost pressure is in a transient state wherein a target boost pressure is varied as a function of the rate of change of the actual boost pressure in said closed-loop control.
Claim 6
Independent Claim
83 words
A method of controlling the boost pressure of a blower driven by the exhaust gas or the power output from an engine, comprising the steps of: controlling the boost pressure under closed-loop control when the boost pressure is in a steady state; and controlling the boost pressure under open-loop control when the boost pressure is in a transient state wherein a target boost pressure is varied as a function of the rate of change of the actual boost pressure in said closed-loop control.
Claim 7
Dependent Claim
45 words
A method according to claim 3, wherein said target boost pressure is set apart from said actual boost pressure by an amount which is substantially proportional to the magnitude of the speed at which the actual boost pressure goes apart from the target boost pressure.
Claim 8
Independent Claim
93 words
A method of controlling the boost pressure of a blower driven by the exhaust gas or the power output from an engine, comprising the steps of: controlling the boost pressure under closed-loop control when the boost pressure is in a steady state; and controlling the boost pressure under open-loop control when the boost pressure is in a transient state wherein the boost pressure is controlled to reach a target boost pressure by adjusting a command value as a function of the temperature of intake air supplied to the engine and the atmospheric pressure.
Claim 9
Independent Claim
93 words
A method of controlling the boost pressure of a blower driven by the exhaust gas or the power output from an engine, comprising the steps of: controlling the boost pressure under closed-loop control when the boost pressure is in a steady state; and controlling the boost pressure under open-loop control when the boost pressure is in a transient state wherein the boost pressure is controlled to reach a target boost pressure by adjusting a command value as a function of the temperature of intake air supplied to the engine and the atmospheric pressure.
Claim 10
Independent Claim
89 words
A method of controlling the boost pressure of a blower driven by the exhaust gas or the power output from an engine, comprising the steps of: controlling the boost pressure under closed-loop control when the boost pressure is in a steady state; and controlling the boost pressure under open-loop control when the boost pressure is in a transient state, wherein the boost pressure is controlled to reach a target boost pressure by adjusting a command value as a function of the temperature of intake air supplied to the engine.
Claim 11
Independent Claim
89 words
A method of controlling the boost pressure of a blower driven by the exhaust gas or the power output from an engine, comprising the steps of: controlling the boost pressure under closed-loop control when the boost pressure is in a steady state; and controlling the boost pressure under open-loop control when the boost pressure is in a transient state, wherein the boost pressure is controlled to reach a target boost pressure by adjusting a command value as a function of the temperature of intake air supplied to the engine.
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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) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |