Patent US4473038A successfully refreshed from Google Patents.
US4473038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homogenizing device for the intake mixture of an internal combustion engine
Assignee: Fiat Auto SpA
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Filing: 1981-07-02
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Granted: 1984-09-25
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Expires: 2001-07-02
Abstract
Abstract The invention relates to an improvement in internal combustion engines, by which cavities are provided communicating by way of a respective passage with the intake duct of each cylinder, in order to induce a turbulent movement in the mixture stream drawn in by the engine.
Inventors
- 👤 Rimoldi Lorenzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:30
CPC Classifications
F; F02; F02B; F02B27/00; F02B27/008; F02M; F02M29/00; F02M29/04; F02M29/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A new article of manufacture comprising a homogenising device for the air and petrol intake mixture of a multi-cylinder internal combustion engine in which individual intake ducts are provided with a separate throttle valve, said device including an accumulation capacity for each intake duct communicating solely by way of a single passage of small cross-section as compared with said duct, with said intake duct downstream of said throttle valve, said accumulation capacity having a volume which is a small fraction of the total volume of the cylinder and said intake duct downstream of the throttle valve, the ratio of the volume of said accumulation capacity Va to the total volume Vt of the cylinder and the suction duct downstream of the throttle valve lying between the following values: (2/100)<(Va/Vt)<(2/10) and the ratio of the cross-section Sg of said small cross section passage to the volume Va of the accumulation capacity lies between the following values: (1/1000)<Sg/Va<2/1000[1/cm].
Claim 2
Dependent Claim
156 words
A new article of manufacture comprising a homogenising device for the air and petrol intake mixture of a multi-cylinder internal combustion engine in which individual intake ducts are provided with a separate throttle valve, said device including an accumulation capacity for each intake duct communicating solely by way of a single passage of small cross-section as compared with said duct, with said intake duct downstream of said throttle valve, said accumulation capacity having a volume which is a small fraction of the total volume of the cylinder and said intake duct downstream of the throttle valve, the ratio of the volume of said accumulation capacity Va to the total volume Vt of the cylinder and the suction duct downstream of the throttle valve lying between the following values: (2/100)<(Va/Vt)<(2/10) and the ratio of the cross-section Sg of said small cross section passage to the volume Va of the accumulation capacity lies between the following values: (1/1000)<Sg/Va<2/1000[1/cm].
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JPS5587821A
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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) | 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 |