Patent US2821906A successfully refreshed from Google Patents.
US4563984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction pipe apparatus for an internal-combustion engine
Assignee: Dr Ing HCF Porsche AG
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Filing: 1984-09-20
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Granted: 1986-01-14
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Expires: 2004-09-20
Abstract
Abstract A suction pipe apparatus for an internal-combustion engine with fuel injection, especially intermittent fuel injection into intake pipes connected to the cylinder head of the engine. The intake pipes are connected to the cylinder head by a flanged, structure-borne-noise-insulating connecting pipe made from an elastomer. A sleeve-shaped portion for receiving a fuel injection valve is also provided at the connecting pipe. The sleeve-like portion encapsulates the valve to reduce noise emissions. The flange of the connecting pipe is provided with a reinforcing member to enhance the integrity and durability of the connection.
Inventors
- 👤 Gerhard Ziegler
- 👤 Karl Gregotsch
- 👤 Rolf von Sivers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:50
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/10; F02M35/10006; F02M35/10078; F02M35/10085; F02M35/10091; F02M35/10144; F02M35/10209; F02M35/10216; F02M35/10314; F02M35/10321; F02M61/00; F02M61/14; F02M61/145; F02M69/00; F02M69/04; F02M69/042; F02M69/044; F05; F05C; F05C2225/00; F05C2225/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
98 words
Suction pipe apparatus for internal-combustion engine having fuel injection, especially intermittent fuel injection into an intake pipe connected to a cylinder head of the engine, comprising a one-piece structure-borne-noise insulating connecting pipe formed of a vibration attenuating material being arranged between the cylinder head and the intake pipe, said connecting pipe having sleeve-shaped receiving means for receiving a fuel injection valve, wherein an inner surface of the sleeve-shaped receiving means conforms to and encloses a noise-reflecting surface of a nozzle end of the fuel injection valve to reduce a major portion of vibration emanating from the noise-reflecting surface.
Claim 2
Dependent Claim
98 words
Suction pipe apparatus for internal-combustion engine having fuel injection, especially intermittent fuel injection into an intake pipe connected to a cylinder head of the engine, comprising a one-piece structure-borne-noise insulating connecting pipe formed of a vibration attenuating material being arranged between the cylinder head and the intake pipe, said connecting pipe having sleeve-shaped receiving means for receiving a fuel injection valve, wherein an inner surface of the sleeve-shaped receiving means conforms to and encloses a noise-reflecting surface of a nozzle end of the fuel injection valve to reduce a major portion of vibration emanating from the noise-reflecting surface.
Claim 3
Dependent Claim
20 words
Suction pipe apparatus according to claim 1, wherein the connecting pipe and the receiving means are formed from an elastomer.
Claim 4
Dependent Claim
21 words
Suction pipe apparatus according to claim 2, wherein a flange portion of the connecting pipe is provided with a stiffening member.
Claim 5
Dependent Claim
22 words
Suction pipe apparatus according to claim 2, wherein the elastomeric connecting pipe is integrally formed on the intake pipe by injection molding.
References Cited (Backward Citations)
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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) | 1989-01-13 | 1989-07-15 | 1990-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-13 | 1993-07-15 | 1994-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-13 | 1997-07-15 | 1998-01-14 | $7700.00 | Window Closed / Lapsed |