Patent US4969445A successfully refreshed from Google Patents.
US4969445A
Expired / Lapsed
US
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Device for exhaust gas recirculation on a multi-cylinder diesel internal combustion engine
Assignee: Daimler Benz AG
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Filing: 1989-09-29
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Granted: 1990-11-13
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Expires: 2009-09-29
Abstract
Abstract A device for the exhaust gas recirculation on a multi-cylinder diesel internal combustion engine with exhaust manifolds assigned to cylinder groups has manifold parts integrally combined into a twin branch with a common partition wall separating the flows of the two exhaust manifolds, in which partition wall an opening is provided, via which the manifold parts of the two exhaust manifolds are in connection with the exhasut recirculation pipe.
Inventors
- 👤 Gernot Hertweck
- 👤 Christian Enderle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:05
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/011; F01N13/08; F01N13/10; F02; F02M; F02M26/00; F02M26/13; F02M26/14; F02M26/16; F02M26/42; F02M26/65; F02M26/66; F02M26/68; F01N13/107; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
110 words
Device for exhaust gas recirculation on a multi-cylinder diesel internal combustion engine with exhaust manifolds assigned to cylinder groups comprising: manifold parts integrally combined into a twin branch with a common partition wall separating flows of the exhaust manifolds; an exhaust recirculation pipe leading from the manifold parts to an intake pipe; and an exhaust recirculation valve controlling an exhaust gas recirculation rate as a function of operating parameters of the internal combustion engine, the common partition wall between the manifold parts having an opening via which through actuation of the exhaust recirculation valve the manifold parts are in fluid connection with the exhaust recirculation pipe for controlling the rate.
Claim 2
Dependent Claim
110 words
Device for exhaust gas recirculation on a multi-cylinder diesel internal combustion engine with exhaust manifolds assigned to cylinder groups comprising: manifold parts integrally combined into a twin branch with a common partition wall separating flows of the exhaust manifolds; an exhaust recirculation pipe leading from the manifold parts to an intake pipe; and an exhaust recirculation valve controlling an exhaust gas recirculation rate as a function of operating parameters of the internal combustion engine, the common partition wall between the manifold parts having an opening via which through actuation of the exhaust recirculation valve the manifold parts are in fluid connection with the exhaust recirculation pipe for controlling the rate.
Claim 3
Dependent Claim
119 words
Device for exhaust gas recirculation on a multi-cylinder diesel internal combustion engine with exhaust manifolds assigned to cylinder groups comprising: manifold parts integrally combined into a twin branch with a common partition wall separating flows of the exhaust manifolds; and exhaust recirculation pipe leading from the manifold parts to an intake pipe; and an exhaust recirculation valve controlling an exhaust gas recirculation rate as a function of operating parameters of the internal combustion engine, the common partition wall between the manifold parts having an opening via which the manifold parts are in fluid connection with the exhaust recirculation pipe, wherein a partition wall part, which is controllable and coupled to the exhaust recirculation valve, is arranged in the opening.
Claim 4
Dependent Claim
119 words
Device for exhaust gas recirculation on a multi-cylinder diesel internal combustion engine with exhaust manifolds assigned to cylinder groups comprising: manifold parts integrally combined into a twin branch with a common partition wall separating flows of the exhaust manifolds; and exhaust recirculation pipe leading from the manifold parts to an intake pipe; and an exhaust recirculation valve controlling an exhaust gas recirculation rate as a function of operating parameters of the internal combustion engine, the common partition wall between the manifold parts having an opening via which the manifold parts are in fluid connection with the exhaust recirculation pipe, wherein a partition wall part, which is controllable and coupled to the exhaust recirculation valve, is arranged in the opening.
Claim 5
Dependent Claim
47 words
Device according to claim 2, wherein the exhaust recirculation valve has a valve disk, which, in the closed position, is firmly connected to the partition wall part, and seals off a valve seat, while the partition wall part separates the manifold parts apart from a minimal gap.
Claim 6
Dependent Claim
25 words
Device according to claim 1, wherein the exhaust recirculation valve is fitted in the exhaust recirculation pipe in a region remote from the exhaust manifold.
Claim 7
Independent Claim
99 words
A device for exhaust gas recirculation in a multi-cylinder internal-combustion engine, particularly a diesel internal-combustion engine, comprising exhaust manifolds assigned to cylinder groups, with manifold parts integrally combined with a twin branch having a common partition wall separating flows of the two exhaust manifolds and being provided with an opening, exhaust recirculation pipe leading to an intake pipe, and an exhaust recirculation valve controlling the exhaust gas recirculation rate as a function of operating parameters of the internal-combustion engine, wherein the exhaust recirculation pipe originates from the opening arranged in the common partition wall of the two manifold parts.
Claim 8
Independent Claim
99 words
A device for exhaust gas recirculation in a multi-cylinder internal-combustion engine, particularly a diesel internal-combustion engine, comprising exhaust manifolds assigned to cylinder groups, with manifold parts integrally combined with a twin branch having a common partition wall separating flows of the two exhaust manifolds and being provided with an opening, exhaust recirculation pipe leading to an intake pipe, and an exhaust recirculation valve controlling the exhaust gas recirculation rate as a function of operating parameters of the internal-combustion engine, wherein the exhaust recirculation pipe originates from the opening arranged in the common partition wall of the two manifold parts.
Claim 9
Dependent Claim
26 words
The device according to claim 5, wherein a partition wall part, which is controllable and coupled to the exhaust recirculation valve, is arranged in the opening.
Claim 10
Dependent Claim
48 words
The device according to claim 6, wherein the exhaust recirculation valve has a valve disk, which, in the closed position, is firmly connected to the partition wall part, and seals off a valve seat, while the partition wall part separates the manifold parts apart from a minimal gap.
Claim 11
Dependent Claim
26 words
The device according to claim 5, wherein the exhaust recirculation valve is fitted in the exhaust recirculation pipe in a region remote from the exhaust manifold.
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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) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |