Patent US4473055A successfully refreshed from Google Patents.
US4473055A
Expired / Lapsed
US
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Method and apparatus for controlling the amount of intake air in an internal-combustion engine having a supercharger
Assignee: Toyota Motor Corp
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Filing: 1983-06-23
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Granted: 1984-09-25
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Expires: 2003-06-23
Abstract
Abstract In an internal-combustion engine having a supercharger and an air-bypass passage for controlling the idle speed, when the engine is being cranked, the air-bypass passage is completely open. When the engine is not being cranked and the supercharger is operating, the air-bypass passage is completely closed. Further, when the engine is not being cranked and the supercharger is not operating, the opening of the air-bypass passage is adjusted in accordance with predetermined operating parameters.
Inventors
- 👤 Yoshiyasu Ito
- 👤 Yuji Takeda
- 👤 Toshio Suematsu
- 👤 Katsushi Anzai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:23
CPC Classifications
F; F02; F02B; F02B33/00; F02B33/44; F02B33/446; F02D; F02D23/00; F02D31/00; F02D31/001; F02D31/002; F02D31/003; F02D41/00; F02D41/0002; F02D41/0007; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
156 words
A method for controlling the amount of intake-air in an internal-combustion engine having a supercharger, an intake-air passage, a throttle valve disposed in said intake-air passage, an air-bypass passage connecting the upstream side of said throttle valve to the downstream side thereof, and a control valve disposed in said air-bypass passage, comprising the steps of: detecting the amount of air taken into said engine; detecting the engine speed; determining whether or not said engine is being cranked; when said engine is being cranked, completely opening said control valve; when said engine is not being cranked, determining whether or not said supercharger is operating dependent upon said intake-air amount and said engine speed; when said supercharger is operating, completely closing said control valve; when said supercharger is not operating, calculating the opening of said control valve dependent upon said intake-air amount and said engine speed so as to control said control valve dependent upon the calculated opening.
Claim 2
Independent Claim
156 words
A method for controlling the amount of intake-air in an internal-combustion engine having a supercharger, an intake-air passage, a throttle valve disposed in said intake-air passage, an air-bypass passage connecting the upstream side of said throttle valve to the downstream side thereof, and a control valve disposed in said air-bypass passage, comprising the steps of: detecting the amount of air taken into said engine; detecting the engine speed; determining whether or not said engine is being cranked; when said engine is being cranked, completely opening said control valve; when said engine is not being cranked, determining whether or not said supercharger is operating dependent upon said intake-air amount and said engine speed; when said supercharger is operating, completely closing said control valve; when said supercharger is not operating, calculating the opening of said control valve dependent upon said intake-air amount and said engine speed so as to control said control valve dependent upon the calculated opening.
Claim 3
Dependent Claim
43 words
A method as set forth in claim 1, wherein said supercharger operation-determining step includes the steps of: dividing said intake-air amount by said engine speed; and determining whether or not the divided intake-air amount is equal to or greater than a predetermined value.
Claim 4
Independent Claim
168 words
An apparatus for controlling the amount of intake air in an internal-combustion engine having a supercharger, an intake-air passage, a throttle valve disposed in said intake-air passage, an air-bypass passage connecting the upstream side of said throttle valve to the downstream side thereof, and a control valve disposed in said air-bypass passage, comprising: means for detecting the amount of air taken into said engine; means for detecting the engine speed; means for determining whether or not said engine is being cranked; means for completely opening said control valve when said engine is being cranked; means for determining whether or not said supercharger is operating dependent upon said intake-air amount and said engine speed when said engine is not being cranked; means for completely closing said control valve when said supercharger is operating; means for calculating the opening of said control valve dependent upon said intake-air amount and said engine speed, so as to control said control valve dependent upon the calculated opening, when said supercharger is not operating.
Claim 5
Independent Claim
168 words
An apparatus for controlling the amount of intake air in an internal-combustion engine having a supercharger, an intake-air passage, a throttle valve disposed in said intake-air passage, an air-bypass passage connecting the upstream side of said throttle valve to the downstream side thereof, and a control valve disposed in said air-bypass passage, comprising: means for detecting the amount of air taken into said engine; means for detecting the engine speed; means for determining whether or not said engine is being cranked; means for completely opening said control valve when said engine is being cranked; means for determining whether or not said supercharger is operating dependent upon said intake-air amount and said engine speed when said engine is not being cranked; means for completely closing said control valve when said supercharger is operating; means for calculating the opening of said control valve dependent upon said intake-air amount and said engine speed, so as to control said control valve dependent upon the calculated opening, when said supercharger is not operating.
Claim 6
Dependent Claim
44 words
An apparatus as set forth in claim 3, wherein said supercharger operation-determining means includes: means for dividing said intake-air amount by said engine speed; and means for determining whether or not the divided intake-air amount is equal to or greater than a predetermined value.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-25 | 1988-03-26 | 1988-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-25 | 1992-03-26 | 1992-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-25 | 1996-03-26 | 1996-09-25 | $7700.00 | Window Closed / Lapsed |