Hollow Fin Tube Structure at Inlet of EGR Cooler
First Claim
1. An exhaust gas recirculation (EGR) cooler comprising:
- an EGR cooler housing comprising;
a top wall,a bottom wall opposite the top wall,a first side wall extending from the top wall to the bottom wall,a second side wall extending from the top wall to the bottom wall opposite the first side wall,an inlet end wall disposed at an inlet end of the EGR cooler and having an exhaust gas inlet opening, andan outlet end wall disposed at an outlet end of the EGR cooler opposite the inlet end and having an exhaust gas outlet opening, wherein an EGR cooler longitudinal axis extends in a direction of an exhaust gas flow from the inlet end to the outlet end; and
a plurality of cooling tubes extending through the EGR cooler housing from the top wall to the bottom wall with each having a tube longitudinal axis, the plurality of cooling tubes being arranged in a cooling tube array when viewed perpendicular to a viewing plane that is parallel to the EGR cooler longitudinal axis and perpendicular to the tube longitudinal axes, wherein the cooling tube array is arranged to form an exhaust gas receiving area at an upstream side of the cooling tube array proximate the inlet end wall so that exhaust gas flowing into the EGR cooler through the exhaust gas inlet opening will flow into the exhaust gas receiving area and then disperse through the cooling tube array.
1 Assignment
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Accused Products
Abstract
An EGR cooler may include an EGR cooler housing having top, bottom and side walls, inlet and outlet end walls disposed at opposite ends, and a longitudinal axis extending in a direction of exhaust gas flow from the inlet end to the outlet end. A plurality of cooling tubes extend through the EGR cooler between the top and bottom walls, and are arranged in a cooling tube array to form an exhaust gas receiving area at an upstream side of the cooling tube array proximate the inlet end wall so that exhaust gas flowing into the EGR cooler through an exhaust gas inlet opening will flow into the exhaust gas receiving area and then disperse through the cooling tube array. A pitch distance between the cooling tubes may be greater proximate the longitudinal axis than proximate the side walls to promote flow through, instead of around, the cooling tube array.
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Citations
20 Claims
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1. An exhaust gas recirculation (EGR) cooler comprising:
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an EGR cooler housing comprising; a top wall, a bottom wall opposite the top wall, a first side wall extending from the top wall to the bottom wall, a second side wall extending from the top wall to the bottom wall opposite the first side wall, an inlet end wall disposed at an inlet end of the EGR cooler and having an exhaust gas inlet opening, and an outlet end wall disposed at an outlet end of the EGR cooler opposite the inlet end and having an exhaust gas outlet opening, wherein an EGR cooler longitudinal axis extends in a direction of an exhaust gas flow from the inlet end to the outlet end; and a plurality of cooling tubes extending through the EGR cooler housing from the top wall to the bottom wall with each having a tube longitudinal axis, the plurality of cooling tubes being arranged in a cooling tube array when viewed perpendicular to a viewing plane that is parallel to the EGR cooler longitudinal axis and perpendicular to the tube longitudinal axes, wherein the cooling tube array is arranged to form an exhaust gas receiving area at an upstream side of the cooling tube array proximate the inlet end wall so that exhaust gas flowing into the EGR cooler through the exhaust gas inlet opening will flow into the exhaust gas receiving area and then disperse through the cooling tube array. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An exhaust gas recirculation (EGR) cooler comprising:
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an EGR cooler housing comprising; a top wall, a bottom wall opposite the top wall, a first side wall extending from the top wall to the bottom wall, a second side wall extending from the top wall to the bottom wall opposite the first side wall, an inlet end wall disposed at an inlet end of the EGR cooler and having an exhaust gas inlet opening, and an outlet end wall disposed at an outlet end of the EGR cooler opposite the inlet end and having an exhaust gas outlet opening, wherein an EGR cooler longitudinal axis extends in a direction of an exhaust gas flow from the inlet end to the outlet end; and a plurality of cooling tubes extending through the EGR cooler housing from the top wall to the bottom wall with each having a tube longitudinal axis, the plurality of cooling tubes being arranged in a cooling tube array when viewed perpendicular to a viewing plane that is parallel to the EGR cooler longitudinal axis and perpendicular to the tube longitudinal axes, wherein the cooling tube array is arranged in a plurality of tube rows that are perpendicular to the EGR cooler longitudinal axis with the plurality of cooling tubes of each of the plurality of tube rows being spaced from each adjacent cooling tube by a pitch distance between their tube longitudinal axes, wherein the cooling tube array comprises; a first cooling tube array section proximate the EGR cooler longitudinal axis, wherein the pitch distance between adjacent cooling tubes in the first cooling tube array section is equal to a first pitch distance, and a pair of second cooling tube array sections, with each second cooling tube array section being disposed between the first cooling tube array section and a corresponding one of the first side wall and the second side wall, and wherein the pitch distance between the adjacent cooling tubes in the pair of second cooling tube array sections is equal to a second pitch distance that is less than the first pitch distance. - View Dependent Claims (12, 13, 14, 15)
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16. An exhaust gas recirculation (EGR) cooler comprising:
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an EGR cooler housing comprising; a top wall, a bottom wall opposite the top wall, a first side wall extending from the top wall to the bottom wall, a second side wall extending from the top wall to the bottom wall opposite the first side wall, an inlet end wall disposed at an inlet end of the EGR cooler and having an exhaust gas inlet opening, and an outlet end wall disposed at an outlet end of the EGR cooler opposite the inlet end and having an exhaust gas outlet opening, wherein an EGR cooler longitudinal axis extends in a direction of exhaust gas flow from the inlet end to the outlet end; and a plurality of cooling tubes extending through the EGR cooler housing from the top wall to the bottom wall with each having a tube longitudinal axis, the plurality of cooling tubes being arranged in a cooling tube array when viewed perpendicular to a viewing plane that is parallel to the EGR cooler longitudinal axis and perpendicular to the tube longitudinal axes, wherein the cooling tube array is arranged to form an exhaust gas receiving area at an upstream side of the cooling tube array proximate the inlet end wall so that exhaust gas flowing into the EGR cooler through the exhaust gas inlet opening will flow into the exhaust gas receiving area and then disperse through the cooling tube array, and wherein the cooling tube array is arranged in a plurality of tube rows that are perpendicular to the EGR cooler longitudinal axis with the plurality of cooling tubes of each of the plurality of tube rows being spaced from each adjacent cooling tube by a pitch distance between their tube longitudinal axes, wherein the cooling tube array comprises; a first cooling tube array section proximate the EGR cooler longitudinal axis, wherein the pitch distance between adjacent cooling tubes in the first cooling tube array section is equal to a first pitch distance, and a pair of second cooling tube array sections, with each second cooling tube array section being disposed between the first cooling tube array section and a corresponding one of the first side wall and the second side wall, and wherein the pitch distance between the adjacent cooling tubes in the pair of second cooling tube array sections is equal to a second pitch distance that is less than the first pitch distance. - View Dependent Claims (17, 18, 19, 20)
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Specification