An exhaust gas cooler and method of cooling are provided. The exhaust gas cooler includes an inlet and outlet manifold and respectively including inlet and outlet openings and respectively positioned at a first and second end of the cooler. The exhaust gas cooler includes a plurality of conduits cou
An exhaust gas cooler and method of cooling are provided. The exhaust gas cooler includes an inlet and outlet manifold and respectively including inlet and outlet openings and respectively positioned at a first and second end of the cooler. The exhaust gas cooler includes a plurality of conduits coupled to the inlet and outlet manifold and also includes at least one side wall coupled to the inlet and outlet manifold around the plurality of conduits, such that the plurality of conduits are disposed in a region between the at least one side wall and the inlet and outlet manifold. The at least one sidewall includes a first coolant inlet opening and a first coolant outlet opening each adjacent a first end of the exhaust gas cooler, a second coolant inlet opening, and a second coolant outlet opening. The exhaust gas cooler includes a bypass conduit positioned outside of the region.
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1. An exhaust gas cooler for cooling recirculating exhaust gas, the exhaust gas cooler comprising: an inlet manifold positioned at a first end of the exhaust gas cooler, the inlet manifold including a plurality of exhaust gas inlet openings;an outlet manifold positioned at a second end of the exhaus
1. An exhaust gas cooler for cooling recirculating exhaust gas, the exhaust gas cooler comprising: an inlet manifold positioned at a first end of the exhaust gas cooler, the inlet manifold including a plurality of exhaust gas inlet openings;an outlet manifold positioned at a second end of the exhaust gas cooler, the outlet manifold including a plurality of exhaust gas outlet openings;a plurality of conduits coupled to the inlet manifold and the outlet manifold, each conduit in the plurality of conduits extending from an exhaust gas inlet opening of the plurality of exhaust gas inlet openings in the inlet manifold to an exhaust gas outlet opening of the plurality of exhaust gas outlet openings in the outlet manifold;at least one side wall coupled to the outlet manifold and the inlet manifold around the plurality of conduits such that the plurality of conduits are disposed in a region between the at least one side wall, the inlet manifold and the outlet manifold, the at least one sidewall including: a first coolant inlet opening adjacent the first end of the exhaust gas cooler,a first coolant outlet opening adjacent the first end of the exhaust gas cooler,a second coolant inlet opening, anda second coolant outlet opening; anda bypass conduit positioned outside of the region, the bypass conduit fluidly coupling the first coolant outlet opening to the second coolant inlet opening, such that at least a part of a coolant flowing into the region adjacent the first end of the exhaust gas cooler and between the plurality of conduits flows out of the region adjacent the first end via the first coolant outlet opening, through the bypass conduit, and back into the region via the second coolant inlet opening. 2. The exhaust gas cooler of claim 1, wherein the first coolant inlet opening is substantially opposite the first coolant outlet opening. 3. The exhaust gas cooler of claim 1, wherein the first end is substantially opposite the second end. 4. The exhaust gas cooler of claim 1, wherein the second coolant inlet opening in the side wall is adjacent the second end. 5. The exhaust gas cooler of claim 1, wherein the second coolant outlet opening in the side wall is adjacent the second end. 6. The exhaust gas cooler of claim 1, wherein each conduit in the plurality of conduits is substantially parallel the other conduits in the plurality of conduits. 7. The exhaust gas cooler of claim 6, wherein the bypass conduit is configured to provide a coolant flow path substantially parallel to the plurality of conduits. 8. The exhaust gas cooler of claim 1, wherein the second coolant inlet opening is substantially opposite the second coolant outlet opening. 9. The exhaust gas cooler of claim 1, wherein the inlet manifold includes a first flange and the outlet manifold include a second flange. 10. The exhaust gas cooler of claim 1, further comprising a vent positioned in the bypass conduit. 11. The exhaust gas cooler of claim 1, wherein the first coolant outlet opening is directly coupled to the second coolant inlet opening via the bypass conduit. 12. The exhaust gas cooler of claim 1, wherein the first coolant inlet opening and the first coolant outlet opening are substantially orthogonal to the plurality of conduits. 13. The exhaust gas cooler of claim 1, further comprising a first coolant conduit outside of the region and fluidly coupled to the first coolant inlet opening and second coolant conduit outside of the region and fluidly coupled to the second coolant outlet. 14. The exhaust gas cooler of claim 1, wherein the bypass conduit is configured to bypass at least 25% of the coolant flowing into the first coolant inlet. 15. The exhaust gas cooler of claim 1, wherein each conduit in the plurality of conduits extends into the exhaust inlet opening of the plurality of exhaust inlet openings and into the exhaust outlet opening of the plurality of exhaust outlet openings. 16. The exhaust gas cooler of claim 1, wherein each conduit in the plurality of conduits extends through the exhaust inlet opening of the plurality of exhaust inlet openings and through the exhaust outlet opening of the plurality of exhaust outlet openings. 17. The exhaust gas cooler of claim 1, wherein each conduit in the plurality of conduits extend into the exhaust inlet opening of the plurality of exhaust inlet openings and into the exhaust outlet opening of the plurality of exhaust outlet openings. 18. A method of cooling recirculating exhaust gas via an exhaust gas cooler, the method comprising: causing exhaust gas to flow into an inlet manifold positioned at a first end of the exhaust gas cooler and out of an outlet manifold positioned at a second end of the exhaust gas cooler, the exhaust gas transmitted from the inlet manifold to the outlet manifold via a plurality of conduits coupled to the inlet manifold and the outlet manifold, each conduit in the plurality of conduits extending from an exhaust gas inlet opening of the plurality of exhaust gas inlet openings in the inlet manifold to an exhaust gas outlet opening of the plurality of exhaust gas outlet openings in the outlet manifold;causing coolant to flow into a region between at least one side wall coupled to the outlet manifold and the inlet manifold around the plurality of conduits, the coolant flowing into the region via a first coolant inlet opening in the at least one side wall, the first coolant inlet opening adjacent the first end of the exhaust gas cooler;causing at least a portion of the coolant to flow out of the region via a first coolant outlet opening adjacent the first end of the exhaust gas cooler;causing the at least a portion of the coolant to flow back into the region via a bypass conduit fluidly coupling the first coolant outlet opening to a second coolant inlet opening in the at least one side wall; andcausing the coolant to flow out of the region via a second coolant outlet opening in the at least one side wall,whereby heat is convectively transferred from exhaust gas flowing through the plurality of conduits to coolant flowing through the region. 19. The method of claim 18 further comprising causing gas to vent from the bypass conduit via a vent disposed therein. 20. The method of claim 19, wherein the first coolant outlet opening is directly coupled to the second coolant inlet opening via the bypass conduit. 21. An engine system for cooling recirculating exhaust gas, the engine system comprising: an engine;an exhaust manifold configured to receive exhaust from at least one cylinder of the engine;an exhaust gas cooler including: an inlet manifold positioned at a first end of the exhaust gas cooler, the inlet manifold including a plurality of exhaust gas inlet openings;an outlet manifold positioned at a second end of the exhaust gas cooler, the outlet manifold including a plurality of exhaust gas outlet openings;a plurality of conduits coupled to the inlet manifold and the outlet manifold, each conduit in the plurality of conduits extending from an exhaust gas inlet opening of the plurality of exhaust gas inlet openings to an exhaust gas outlet opening of the plurality of exhaust gas outlet openings;at least one side wall coupled to the outlet manifold and the inlet manifold around the plurality of conduits such that the plurality of conduits are disposed in a region between the at least one side wall, the inlet manifold and the outlet manifold, the at least one sidewall including: a first coolant inlet opening adjacent the first end of the exhaust gas cooler,a first coolant outlet opening adjacent the first end of the exhaust gas cooler,a second coolant inlet opening, anda second coolant outlet opening; anda bypass conduit positioned outside of the region, the bypass conduit fluidly coupling the first coolant outlet opening to the second coolant inlet opening, such that at least a part of a coolant flowing into the region adjacent the first end of the exhaust gas cooler and between the plurality of conduits flows out of the region adjacent the first end via the first coolant outlet opening, through the bypass conduit, and back into the region via the second coolant inlet opening; andan intake manifold configured to provide intake air into the at least one cylinder,wherein the exhaust gas cooler is coupled to the exhaust manifold via the inlet manifold of the exhaust gas cooler and wherein exhaust gas cooler is coupled to the intake manifold via the outlet manifold of the exhaust gas cooler. 22. The engine system according to claim 21, wherein the first coolant inlet opening is substantially opposite the first coolant outlet opening. 23. The engine system according to claim 21, wherein the first coolant outlet opening is directly coupled to the second coolant inlet opening via the bypass conduit. 24. The engine system according to claim 21, wherein the second coolant inlet opening in the side wall is adjacent the second end. 25. The engine system according to claim 22, wherein the bypass conduit is configured to provide a coolant flow path substantially parallel to the plurality of conduits. 26. The engine system according to claim 22, wherein the second coolant inlet opening is substantially opposite the second coolant outlet opening. 27. The engine system according to claim 22, further comprising a vent positioned in the bypass conduit. 28. The engine system according to claim 22, wherein the bypass conduit is configured to bypass at least 25% of the coolant flowing into the first coolant inlet. 29. An exhaust gas cooler for cooling recirculating exhaust gas, the exhaust gas cooler comprising: exhaust gas flow means for causing exhaust gas to flow into an inlet manifold at a first end of the exhaust gas cooler and out of an outlet manifold at a second end of the exhaust gas cooler, the exhaust gas flow means further configured for transmitting the exhaust gas from the inlet manifold to the outlet manifold in a plurality of distinct flow paths;at least one side wall coupled to the outlet manifold and the inlet manifold about the plurality of distinct flow paths;coolant flow entry means for causing coolant to flow into a region within the at least one side wall adjacent the first end of the exhaust gas cooler;bypass means for causing at least a portion of the coolant to flow out of the region adjacent the first end of the exhaust gas cooler and for causing the at least a portion of the coolant to flow back into the region; andcoolant flow exit means for causing the coolant to flow out of the region,whereby heat is convectively transferred from exhaust gas in the plurality of distinct flow paths to coolant flowing into and out of the region.
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