Intake manifold for an internal combustion engine having an internally contained exhaust gas recirculation cooler

An intake manifold for supplying fuel, air and exhaust gases to a V-type multicylinder internal combustion engine having combustion chambers disposed along opposite sides of a longitudinal centerline,

• said manifold comprising a casting having an upwardly opening riser passage, a generally horizontal plenum chamber in communication with said riser passage, a set of runner passages extending generally transversely from said plenum chamber, a transversely extending exhaust gas crossover passage,
• an exhaust gas recirculation passage extending longitudinally from said exhaust gas crossover passage to means for receiving an exhaust gas recirculation control valve constructed to meter the flow of exhaust gas through said exhaust gas recirculation passage,
• a metered exhaust gas passage extending from said valve receiving means to said riser passages,
• a heat exchanger positioned in said exhaust gas recirculation passage comprising a longitudinally extending liquid conduit and finned elements disposed about said conduit,
• a first engine coolang passage opening into said exhaust gas recirculation passage, one end of said conduit extending into said engine coolant passage, a second engine coolant passage opening into said exhaust gas recirculation passage at a point spaced from the opening of said first coolant passage and leading to an outlet, the other end of said conduit extending into said second coolant passage, seal means separating said coolant passages and said coolant conduit from said exhaust gas recirculation passage.

An intake manifold for supplying fuel, air and exhaust gases to a V-type multicylinder internal combustion engine having combustion chambers disposed along opposite sides of a longitudinal centerline,

• said manifold comprising a casting having a pair of generally vertical riser passages transversely spaced on opposite sides of said centerline, an upper generally horizontal plenum chamber extending longitudinally from the bottom of one of said riser passages, a lower generally horizontal plenum chamber extending longitudinally from the bottom of the other of said riser passages, a first set of runner passages extending generally transversely from the ends of said lower plenum chamber, a second set of runner passages extending generally transversely from the ends of said upper plenum chamber, portions of said second set of runner passage being positioned over portions of said first set of runner passages, an exhaust gas crossover passage extending transversely under said upper and lower plenum chambers beneath said riser passages,
• an exhaust gas recirculation passage extending longitudinally from said exhaust gas crossover passage to means for receiving an exhaust gas recirculation control valve constructed to meter the flow of exhaust gas through said exhaust gas recirculation passage, and a metered exhaust gas passage extending from said valve receiving means to said riser passages,
• a coolant passage to conduct engine coolant through the manifold,
• a heat exchanger positioned in said exhaust gas recirculation passage comprising a longitudinally extending liquid conduit and finned elements disposed about said conduit,
• said liquid conduit forming a portion of said coolant passage,
• seals means separating said conduit from said exhaust gas recirculation passage.

An intake manifold for supplying fuel, air and exhaust gases to a V-type multicylinder internal combustion engine having combustion chambers disposed along opposite sides of a longitudinal centerline,

• said manifold comprising a casting having a pair of generally vertical riser passages transversely spaced on opposite sides of said centerline, an upper generally horizontal plenum chamber extending longitudinally from the bottom of one of said riser passages, a lower generally horizontal plenum chamber extending longitudinally from the bottom of the other of said riser passages, a first set of runner passages extending generally transversely from the ends of said lower plenum chamber, a second set of runner passages extending generally transversely from the ends of said upper plenum chamber, portions of said second set of runner passages being positioned over portions of said first set of runner passages, an exhaust gas crossover passage extending transversely under said upper and lower plenum chambers beneath said riser passages,
• an exhaust gas recirculation passage extending longitudinally from said exhaust gas crossover passage to means for receiving an exhaust gas recirculation control valve constructed to meter the flow of exhaust gas through said exhaust gas recirculation passage,
• a metered exhaust gas passage extending from said valve receiving means to said riser passages,
• a heat exchanger positioned in said exhaust gas recirculation passage comprising a longitudinally extending liquid conduit and finned elements disposed about said conduit,
• a first engine coolant passage opening into said exhaust gas recirculation passage, one end of said conduit extending into said engine coolant passage, a second engine coolant passage opening into said exhaust gas recirculation passage at a point spaced from the opening of said first coolant passage and leading to an outlet, the other of said conduit extending into said second coolant passage, seal means separating said coolant passages and said coolant conduit from said exhaust gas recirculation passage.