Engine Including External EGR System
AssigneeGM Global Technology Operations LLC
InventorsB. Jerry SONG, Eric F. GRIMMINGER, Cedric D. ARMAND
Life of this patent
Estimating the term…
Abstract
An engine assembly includes an engine structure defining a combustion chamber. An intake system includes an intake manifold in communication with the combustion chamber. An exhaust system includes an exhaust conduit in communication with the combustion chamber. An exhaust gas recirculation system includes an EGR tube providing communication between the intake and exhaust systems, the EGR tube includes an end portion extending a distance into the intake system in a direction opposing air flow to the intake manifold.
Claims20
An engine assembly comprising:
- an engine structure defining a combustion chamber;
- an intake system including an intake manifold in communication with the combustion chamber;
- an exhaust system including an exhaust conduit in communication with the combustion chamber;
- and
- an exhaust gas recirculation system including an EGR tube providing communication between the intake and exhaust systems, the EGR tube including an end portion extending a distance into the intake system in a direction opposing air flow to the intake manifold.
An engine assembly comprising:
- an engine structure defining a combustion chamber;
- an intake system including an intake manifold in communication with the combustion chamber and a throttle valve adapted to control air flow to the intake manifold;
- an exhaust system including an exhaust conduit in communication with the combustion chamber;
- and
- an exhaust gas recirculation system including an EGR tube in communication with the intake and exhaust systems, the EGR tube including an end portion extending a distance into the intake system at a location between the throttle valve and the intake manifold, the end portion extending in a direction opposing air flow to the intake manifold and parallel to the air flow, the end portion defining a closed longitudinal end having a rounded profile proximate to the throttle valve with at least one opening extending through a side wall of the end portion of the EGR tube.
An engine assembly comprising:
- an engine structure defining a combustion chamber;
- an intake system including an intake manifold in communication with the combustion chamber and a throttle valve adapted to control air flow to the intake manifold;
- an exhaust system including an exhaust conduit in communication with the combustion chamber;
- and
- an exhaust gas recirculation system including an EGR tube in communication with the intake and exhaust systems, the EGR tube including an end portion extending a distance into the intake system at a location between the throttle valve and the intake manifold, the end portion extending in a direction opposing air flow to the intake manifold and parallel to the air flow, the end portion defining a closed longitudinal end having a rounded profile proximate to the throttle valve with at least one opening extending through a side wall of the end portion of the EGR tube, the longitudinal end of the EGR tube being spaced a distance from a pivot region of the throttle valve and the at least one opening being spaced a distance from the pivot region of the throttle valve, the at least one opening having an effective diameter at least equal to the effective diameter of the end portion the EGR tube to produce no significant pressure loss as a result of exhaust gas flow through the at least one opening and the intake system defining a concentric flow path surrounding the end portion of the EGR tube.
Dependencies are inferred from the claim text.