EP0987427B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Device for recirculating an exhaust gas stream to the intake conduit of an engine
Assignee: Gustav Wahler GmbH and Co KG
•
Filing: 1999-07-02
•
Granted: 2004-01-07
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Expires: 2019-07-02
Abstract
No abstract record available.
Inventors
- 👤 Frank Zimmermann
- 👤 Thomas Peuker
- 👤 Wolfgang Knecht
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 08:58
CPC Classifications
F; F28; F28F; F28F27/00; F28F27/02; F02; F02M; F02M26/00; F02M26/13; F02M26/22; F02M26/23; F02M26/25; F02M26/26; F02M26/29; F02M26/32; F02M26/30; F28D; F28D21/00; F28D21/0001; F28D21/0003
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
320 words
Exhaust gas recirculation device of an internal-combustion
engine, for example a diesel internal-combustion
engine with a feedback path (13) leading to the manifold pipe,
with a bypass path (23) parallel to the feedback path (13) and
bridging it, with an exhaust gas cooler (15) connected by its
inlet (16) and its outlet (17) to the bypass path (23), and
with a valve device (20), with which the exhaust gas cooler
(15) can be selectively bypassed, and having two valves (42,
52), of which the first valve (42) is associated with the
feedback path (13) for selective control of the passage
through it or to block it, and the second valve (52) is
associated with the exhaust gas cooler (15) for selective
control of the passage through it or to block it, characterised in that the two valves (42, 52) are combined to
form a module and have an actuator (43) common to both, with
which the valve closure members (46, 54) of the two valves
(42, 52) can be actuated together, and in that this modular
valve device (20) is designed as an independent component and
is fitted directly to the exhaust gas cooler (15) in the
region of the inlet (16) and the outlet (17) or, combined with
the exhaust gas cooler (15), forms a module, and in that the
first valve (42) associated with the feedback path (13) has a
housing passage (45) as its own valve duct, and in that the
second valve (52) associated with the exhaust gas cooler (15)
has a valve duct (53), and in that the valve device (20) has a
feed connection (21) and a discharge connection (22) for the
exhaust gas, and in that the housing passage (45) of the first
valve (42) and the valve duct (53) of the second valve (52)
are each connected into the feedback path (13) via the feed
connection (21) and the discharge connection (22).
Claim 2
Dependent Claim
71 words
Device according to claim 1, characterised in that the
valve closure members (46, 54) of the two valves (42, 52) are
designed as shutters and are arranged on an actuating shaft as
an actuator (43), and in that the valve closure members (46,
54), viewed in the pivoting direction of the actuator (43),
are arranged offset with respect to one another, preferably
about a peripheral angle substantially between 70° and 90°.
Claim 3
Dependent Claim
55 words
Device according to claim 1 or 2, characterised in that the valve duct (53) of the second valve (52) is connected to
the inlet (16) and the outlet (17) of the exhaust gas cooler
(15) and the associated valve closure member (54) is arranged
upstream from the inlet (16) or downstream from the outlet
(17).
Claim 4
Dependent Claim
69 words
Device according to claim 1, characterised in that the
valve device (20) has a bypass outlet (36) and a bypass inlet
(37), in that the bypass inlet (37) is connected to the
discharge connection (22) of the valve device (20), and in
that the bypass outlet (36) is connected to the feed
connection (21) via a first valve duct (38) in the housing
(40) of the valve device (20).
Claim 5
Dependent Claim
34 words
Device according to claim 4, characterised in that the
bypass inlet (37) is connected to the discharge connection
(22) via a second valve duct (39) in the housing (40) of the
valve device (20).
Claim 6
Dependent Claim
33 words
Device according to claim 5, characterised in that the
first valve duct (38) in the housing (40) of the valve device
(20) contains the valve closure member (54) of the second
valve (52).
Claim 7
Dependent Claim
57 words
Device according to any one of claims 1 to 6, characterised in that the valve device (20) is fitted to the
exhaust gas cooler (15) in such a way that the bypass outlet
(36) is connected to the inlet (16) and the bypass inlet (37)
is connected to the outlet (17) of the exhaust gas cooler
(15).
Claim 8
Dependent Claim
38 words
Device according to any one of claims 1 to 7, characterised in that the valve device (20) is fitted with a
housing flange (30) to a flange (31) of the exhaust gas cooler
(15) and is fastened thereto.
References Cited (Backward Citations)
US4134377A
Cited
US5203311A
Cited
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