Internal-combustion engine having a cooled exhaust gas recirculation system as well as an exhaust gas manifold
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsRuediger Eibl, Andreas Witt, Claus Reulein, Claus-Peter Schreck
Life of this patent
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Abstract
An internal-combustion engine contains at least one piston/cylinder unit containing a combustion chamber, having an intake path leading into the combustion chamber, an exhaust gas path leading out of the combustion chamber, and having an exhaust gas manifold. An exhaust gas recirculation path leads from the exhaust gas manifold into the intake path. A cooling device is provided for cooling the recirculated exhaust gas, wherein the cooling device cools the exhaust gas manifold, and the exhaust gas recirculation path branches off the cooled exhaust gas manifold.
Claims17
An internal-combustion engine, comprising:
- at least one piston/cylinder unit containing a combustion chamber;
- an intake path leading into the combustion chamber;
- an exhaust gas manifold in which a cooling device is integrated for cooling the recirculated exhaust gas, wherein the cooling device cools the exhaust gas manifold;
- and
- an exhaust gas recirculation path leading from the exhaust gas manifold into the intake path which path branches off the cooled exhaust gas manifold.
An exhaust gas manifold for an internal combustion engine, comprising:
- a housing operatively configured to couple with an exhaust gas outlet opening in a cylinder head of the internal combustion engine;
- at least one exhaust gas duct configured in the housing, said exhaust gas duct being operatively connected to an exhaust gas duct of the internal combustion engine and ending in at least one outlet opening connectable to an exhaust gas system of the internal combustion engine;
- an exhaust gas recirculation duct originating from the exhaust gas duct and ending in an exhaust gas recirculation opening;
- and
- a cooling device integrally arranged in the housing by which at least exhaust gas flowing through the exhaust gas recirculation duct is cooled.
A method of cooling an exhaust gas recirculation path of an internal combustion engine, the method comprising:
- recirculating exhaust gas through an exhaust gas manifold to an intake path leading into a combustion chamber of the internal combustion engine;
- integrating a cooling device with the exhaust gas manifold;
- and
- cooling, via the integrated cooling device, the recirculated exhaust gas within the exhaust gas manifold.
Dependencies are inferred from the claim text.