Patent US4739737A successfully refreshed from Google Patents.
US4739737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary valve for control of the cylinder charge change of an internal combustion engine
Assignee: Volkswagen AG
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Filing: 1987-08-14
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Granted: 1988-04-26
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Expires: 2007-08-14
Abstract
Abstract In order to produce a rotary valve with short and small cross-sectional dimensions, fresh gas or exhaust gas ducts of the rotary valve are associated with adjacent cylinders and extend in some regions in a common cross-sectional plane, in different halves of the cross section of the rotary valve outside the longitudinal axis thereof, the plane also contains two diametrically opposite fresh gas and, respectively, exhaust gas openings in the rotary valve housing.
Inventors
- 👤 Hermann Kruger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:51
CPC Classifications
F; F01; F01L; F01L7/00; F01L7/02; F01L7/021
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
99 words
A rotary valve for control of a cylinder charge change of an internal combustion engine having a plurality of combustion chambers, the rotary valve comprising: two gas ducts associated with adjacent combustion chambers, said gas ducts being provided so as to extend in a common cross-sectional plane of the rotary valve on different sides of a longitudinal center plane of the rotary valve; and a rotary valve housing having two gas openings provided in the common cross-sectional plane so as to face one another, each of said two gas openings being associated with one of said two gas ducts.
Claim 2
Dependent Claim
99 words
A rotary valve for control of a cylinder charge change of an internal combustion engine having a plurality of combustion chambers, the rotary valve comprising: two gas ducts associated with adjacent combustion chambers, said gas ducts being provided so as to extend in a common cross-sectional plane of the rotary valve on different sides of a longitudinal center plane of the rotary valve; and a rotary valve housing having two gas openings provided in the common cross-sectional plane so as to face one another, each of said two gas openings being associated with one of said two gas ducts.
Claim 3
Dependent Claim
26 words
A rotary valve as defined in claim 1, wherein said two gas ducts are fresh gas ducts, and said two gas openings are fresh gas openings.
Claim 4
Dependent Claim
26 words
A rotary valve as defined in claim 1, wherein said two gas ducts are exhaust gas ducts, and said two gas openings are exhaust gas openings.
References Cited (Backward Citations)
FR964430A
Cited
US994541A
Cited
US1113374A
Cited
US1245257A
Cited
US1273433A
Cited
US1596069A
Cited
US1625307A
Cited
US1702816A
Cited
US1740758A
Cited
DE820512C
Cited
US4473041A
Cited
US4517938A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |