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US5490484A
Expired / Lapsed
US
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Air intake system of an internal-combustion engine
Assignee: Dr Ing HCF Porsche AG
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Filing: 1994-08-26
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Granted: 1996-02-13
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Expires: 2014-08-26
Abstract
Abstract An air intake system has two resonance chambers coupled together by connecting pipes. The resonance chambers are connected to the cylinders by individual intake pipes. A further common chamber is coupled by means of resonance pipes to the resonance chamber. The connecting pipe and several of the resonance pipes have controllable blocking elements. A branch that supplies air to the system is connected with one of the connecting pipes and the further chamber. To deliberately increase the mean pressure, the blocking elements can be connected in cascade fashion as the rpm rises, causing the coupled volume to increase.
Inventors
- 👤 Erwin Rutschmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:42
CPC Classifications
F; F02; F02B; F02B27/00; F02B27/02; F02B27/0226; F02B27/0247; F02B27/0252; F02B27/0205; F02B27/021; F02B27/0242; F02B75/00; F02B75/16; F02B75/18; F02B2075/1804; F02B2075/1824; F02B75/22; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
119 words
Air intake system of a multicylinder two-row internal combustion engine, with the cylinders of both rows each being connected by intake pipes to a resonance chamber associated with the respective row, and with at least one connecting pipe running between the resonance chambers, into which fresh air flows and which has at least one controllable blocking element, wherein each cylinder is provided with at least one separate corresponding resonance pipe, each of said resonance pipes being arranged to extend from one of said resonance chambers to a common chamber which is common to the resonance pipes and provided with a fresh air inlet, and wherein a controllable blocking element is located in at least one of the resonance pipes.
Claim 2
Dependent Claim
119 words
Air intake system of a multicylinder two-row internal combustion engine, with the cylinders of both rows each being connected by intake pipes to a resonance chamber associated with the respective row, and with at least one connecting pipe running between the resonance chambers, into which fresh air flows and which has at least one controllable blocking element, wherein each cylinder is provided with at least one separate corresponding resonance pipe, each of said resonance pipes being arranged to extend from one of said resonance chambers to a common chamber which is common to the resonance pipes and provided with a fresh air inlet, and wherein a controllable blocking element is located in at least one of the resonance pipes.
Claim 3
Dependent Claim
23 words
System according to claim 1, wherein a controllable blocking element is disposed in at least two resonance pipes of each row of cylinders.
Claim 4
Dependent Claim
33 words
System according to claim 1, wherein a second connecting pipe is connected to extend parallel to a first connecting pipe between resonance chambers, said second pipe having at least one controllable blocking element.
Claim 5
Dependent Claim
41 words
System according to claim 1, wherein resonance chambers are arranged on both sides of, at a distance from, and parallel to a plane of symmetry, and wherein the common chamber is mounted so that it extends in this plane of symmetry.
Claim 6
Dependent Claim
41 words
System according to claim 3, wherein resonance chambers are arranged on both sides of, at a distance from, and parallel to a plane of symmetry, and wherein the common chamber is mounted so that it extends in this plane of symmetry.
Claim 7
Dependent Claim
25 words
System according to claim 5, wherein said connecting pipes extend perpendicular to a plane of symmetry between the internal combustion engine and the common chamber.
Claim 8
Dependent Claim
16 words
System according to claim 1, wherein segments of the resonance pipes extend within the resonance chambers.
Claim 9
Dependent Claim
22 words
System according to claim 7, wherein blocking elements are disposed in the segments of the resonance pipes extending within the resonance chambers.
Claim 10
Dependent Claim
22 words
System according to claim 1, wherein at least two resonance pipes of each row of cylinders have diameters different from one another.
Claim 11
Dependent Claim
27 words
System according to claim 7, wherein at least two of the segments of the resonance pipes extending within the resonance chambers have lengths different from one another.
Claim 12
Dependent Claim
27 words
System according to claim 9, wherein at least two of the segments of the resonance pipes extending within the resonance chambers have lengths different from one another.
Claim 13
Dependent Claim
28 words
System according to claim 9, wherein two resonance pipes of one row of cylinders have an identical diameter, while one of these pipes contains a controllable blocking element.
Claim 14
Dependent Claim
28 words
System according to claim 10, wherein two resonance pipes of one row of cylinders have an identical diameter, while one of these pipes contains a controllable blocking element.
Claim 15
Dependent Claim
24 words
System according to claim 8, wherein the segments are cylindrical and are aligned with and spaced apart from intake funnels of the intake pipes.
Claim 16
Dependent Claim
41 words
System according to claim 3, wherein the first connecting pipe has two controllable blocking elements, one on each side of an engine plane of symmetry, and wherein the second connecting pipe has a controllable blocking element located roughly in said plane.
Claim 17
Dependent Claim
39 words
System according to claim 12, wherein each row of cylinders has three resonance pipes lying side by side in a lengthwise direction of the internal combustion engine, with controllable blocking elements being associated with the two outside resonance pipes.
Claim 18
Dependent Claim
24 words
System according to claim 3, wherein the two connecting pipes have an identical diameter that is roughly twice the diameter of the resonance pipes.
Claim 19
Dependent Claim
31 words
System according to claim 1, wherein an additional resonance pipe is associated with each cylinder, said additional resonance pipe extending from the cylinders to the common chamber, bypassing the resonance chambers.
Claim 20
Dependent Claim
140 words
Air intake system of a multicylinder two-row internal combustion engine, with the cylinders of both rows each being connected by intake pipes to a resonance chamber associated with the respective row, and with a first connecting pipe extending between the resonance chambers, into which fresh air flows, and a second connecting pipe extending between the resonance chambers in parallel with said first connecting pipe and having at least one controllable blocking element, wherein at least one resonance pipe is associated with each cylinder, said resonance pipes being arranged to extend from resonance chambers of one row of cylinders to a common chamber which is common to the resonance pipes and which is provided with a fresh air inlet, and wherein a controllable blocking element is located in at least one of the resonance pipes associated with one row of cylinders.
Claim 21
Dependent Claim
140 words
Air intake system of a multicylinder two-row internal combustion engine, with the cylinders of both rows each being connected by intake pipes to a resonance chamber associated with the respective row, and with a first connecting pipe extending between the resonance chambers, into which fresh air flows, and a second connecting pipe extending between the resonance chambers in parallel with said first connecting pipe and having at least one controllable blocking element, wherein at least one resonance pipe is associated with each cylinder, said resonance pipes being arranged to extend from resonance chambers of one row of cylinders to a common chamber which is common to the resonance pipes and which is provided with a fresh air inlet, and wherein a controllable blocking element is located in at least one of the resonance pipes associated with one row of cylinders.
Claim 22
Dependent Claim
142 words
Air intake system of a multicylinder two-row internal combustion engine, with the cylinders of both rows each being connected by intake pipes to a resonance chamber associated with the respective row, and with at least one connecting pipe running between the resonance chambers, into which fresh air flows and which has at least one controllable blocking element, wherein at least one resonance pipe is associated with each cylinder, said resonance pipes being arranged to extend from resonance chambers of one row of cylinders to a common chamber which is common to the resonance pipes and which is provided with a fresh air inlet, wherein a controllable blocking element is located in at least one of the resonance pipes associated with one row of cylinders, and wherein at least two resonance pipes of each row of cylinders have diameters different from one another.
Claim 23
Dependent Claim
142 words
Air intake system of a multicylinder two-row internal combustion engine, with the cylinders of both rows each being connected by intake pipes to a resonance chamber associated with the respective row, and with at least one connecting pipe running between the resonance chambers, into which fresh air flows and which has at least one controllable blocking element, wherein at least one resonance pipe is associated with each cylinder, said resonance pipes being arranged to extend from resonance chambers of one row of cylinders to a common chamber which is common to the resonance pipes and which is provided with a fresh air inlet, wherein a controllable blocking element is located in at least one of the resonance pipes associated with one row of cylinders, and wherein at least two resonance pipes of each row of cylinders have diameters different from one another.
Claim 24
Dependent Claim
151 words
Air intake system of a multicylinder two-row internal combustion engine, with the cylinders of both rows each being connected by intake pipes to a resonance chamber associated with the respective row, and with at least one connecting pipe running between the resonance chambers, into which fresh air flows and which has at least one controllable blocking element, wherein at least one resonance pipe is associated with each cylinder, said resonance pipes being arranged to extend from resonance chambers of one row of cylinders to a common chamber which is common to the resonance pipes and which is provided with a fresh air inlet, wherein a controllable blocking element is located in at least one of the resonance pipes associated with one row of cylinders, and wherein an additional resonance pipe is associated with each cylinder, said additional resonance pipe extending from the cylinders to the common chamber, bypassing the resonance chambers.
Claim 25
Dependent Claim
151 words
Air intake system of a multicylinder two-row internal combustion engine, with the cylinders of both rows each being connected by intake pipes to a resonance chamber associated with the respective row, and with at least one connecting pipe running between the resonance chambers, into which fresh air flows and which has at least one controllable blocking element, wherein at least one resonance pipe is associated with each cylinder, said resonance pipes being arranged to extend from resonance chambers of one row of cylinders to a common chamber which is common to the resonance pipes and which is provided with a fresh air inlet, wherein a controllable blocking element is located in at least one of the resonance pipes associated with one row of cylinders, and wherein an additional resonance pipe is associated with each cylinder, said additional resonance pipe extending from the cylinders to the common chamber, bypassing the resonance chambers.
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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) | 1999-02-12 | 1999-08-14 | 2000-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-12 | 2003-08-14 | 2004-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-12 | 2007-08-14 | 2008-02-13 | $7700.00 | Window Closed / Lapsed |