Internal-combustion engine provided with an exhaust gas recirculation system, in particular for a vehicle
AssigneeIveco Fiat S.p.A.
InventorPietro Bianchi
Life of this patent
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Abstract
An internal-combustion engine, in particular for a vehicle, is provided with a plurality of cylinders and a cylinder head which defines, for each cylinder, at least one exhaust duct and at least one intake duct; the engine is further provided with an exhaust manifold communicating with the exhaust ducts, and a system for recirculating exhaust gas from the exhaust manifold to the intake ducts; the system comprises a further manifold which distributes the recirculated exhaust gases to the intake ducts and communicates with the exhaust manifold through a recirculation duct provided at least partly directly in the cylinder head which is provided with a heat exchanger for cooling the recirculated exhaust gases.
Claims8
An internal-combustion engine, in particular for a vehicle, comprising a plurality of cylinders;
- a cylinder head defining, for each of the cylinders, at least one exhaust duct for the exhaust gases and at least one intake duct;
- an exhaust manifold communicating with said exhaust ducts;
- and a system for recirculating exhaust gas from said exhaust manifold to said intake ducts, and comprising a distribution manifold for distributing the recirculated exhaust gases to said intake ducts, and a recirculation duct extending between said exhaust manifold and said distribution manifold and having at least one portion which is provided directly in said cylinder head;
- said cylinder head comprising heat exchange means for cooling said recirculated exhaust gases;
- said heat exchange means comprising at least one cooling chamber provided in said cylinder head and forming part of a cooling circuit of said engine, and a plurality of heat exchange baffles disposed in said recirculation duct so as to divide one portion of said recirculation duct into a plurality of channels;
- said heat exchange baffles being formed in one piece with said cylinder head.
Dependencies are inferred from the claim text.