Exhaust gas recirculation system for an internal combustion engine
AssigneeCaterpillar Inc.
InventorJohn M. Clarke
Life of this patent
Estimating the term…
Abstract
An exhaust gas recirculation system for use with an internal combustion engine comprising a heat exchanger, a first turbocharger, and a generator. The first turbocharger provides compressed fresh air to an intake manifold. The heat exchanger cools the exhaust gas for recirculation into the intake manifold. The generator provides turbocharger control by imparting stored energy back into the turbocharger. Turbocharger control allows the exhaust gas recirculation system to operate more efficiently and over a wide range of operating conditions.
Claims12
An internal combustion engine having an intake manifold in which intake air is communicated to said internal combustion engine and an exhaust manifold having an exhaust expelled therethrough from a combustion process in said internal combustion engine, said internal combustion engine comprising:
- an exhaust gas recirculation system having a portion of said exhaust from said combustion process in said internal combustion engine recirculated back into said intake manifold;
- a heat exchanger defining a donor portion having an inlet end being in fluid communication with said exhaust manifold and an outlet end being in fluid communication with said intake manifold, a flow of exhaust passing through said donor portion of said heat exchanger, and a recipient portion having an inlet end and an outlet end and having said intake air passing therethrough;
- a first turbocharger defining a turbine section having an inlet portion being in fluid communication with said exhaust manifold and an outlet portion, and a compressor section having an inlet portion and an outlet portion being in fluid communication with said inlet end of said recipient portion of said heat exchanger and said intake manifold, and said turbine section being drivingly connected to said compressor section;
- and
- a generator being operatively connected to said first turbine section of said turbocharger.
An internal combustion engine having an intake manifold in which intake air is communicated to said internal combustion engine and an exhaust manifold having an exhaust expelled therethrough from a combustion process in said internal combustion engine, said internal combustion engine comprising:
- an exhaust gas recirculation system having a portion of said exhaust from said combustion process in said internal combustion engine recirculated back into said intake manifold;
- a heat exchanger defining a donor portion having an inlet end being in fluid communication with said exhaust manifold and an outlet end being in fluid communication with said intake manifold, a flow of exhaust passing through said donor portion of said heat exchanger, said inlet end of said donor portion having a first control member disposed therein, a recipient portion having an inlet end and an outlet end and having said intake air passing therethrough, and said inlet end of said recipient portion having a second control member disposed therein;
- a first turbocharger defining a turbine section having an inlet portion being in fluid communication with said exhaust manifold and an outlet portion, and a compressor section having an inlet portion and an outlet portion being in fluid communication with said inlet end of said recipient portion of said heat exchanger and said intake manifold, and said turbine section being drivingly connected to said compressor section;
- and
- a generator being operatively connected to said first turbine section of said turbocharger.
Dependencies are inferred from the claim text.