Exhaust gas cooler
First Claim
1. An exhaust gas recirculation system cooler, comprising:
- an exhaust gas inlet connected to and in fluid communication with an inlet chamber;
an exhaust gas outlet connected to and in fluid communication with an outlet chamber;
a plurality of generally flat exhaust gas pipes extend parallel to each other through a coolant chamber and are in fluid communication with the inlet chamber on one side and to the outlet chamber on an opposite side;
a coolant inlet connected to and in fluid communication with the coolant chamber; and
a coolant outlet connected to and in fluid communication with the coolant chamber,wherein the exhaust gas pipes include a plurality of outwardly projecting protrusions spaced apart from each other in a longitudinal direction of the exhaust gas pipes, wherein the protrusions of one exhaust gas pipe bear directly against an adjacent exhaust gas pipe at a distance in the longitudinal direction of the exhaust gas pipes from the nearest protrusion of the other exhaust gas pipe;
wherein the exhaust gas pipes have a plurality of inwardly projecting depressions on opposite sides, such that the depressions are at a distance from each other in the longitudinal direction of the exhaust gas pipes;
wherein the protrusions of one exhaust gas pipe bear against the other exhaust gas pipe in a region of at least one depression of the other exhaust gas pipe.
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Accused Products
Abstract
The present invention relates to an exhaust gas cooler (1), in particular for an exhaust gas recirculation system of an internal combustion engine, preferably of a motor vehicle, comprising an exhaust gas inlet (2) which is connected in a communicating manner with an inlet chamber (4), an exhaust gas outlet (3) which is connected in a communicating manner with an outlet chamber (5), a plurality of exhaust gas pipes (7) which are configured as flat pipes, extend parallel to each other through a coolant chamber (8) and are connected in a communicating manner on one side to the inlet chamber (4) and on the other side to the outlet chamber (5), a coolant inlet (9) which is connected in a communicating manner to the coolant chamber (8), and a coolant outlet (10) which is connected in a communicating manner to the coolant chamber (8). The exhaust gas pipes (7) have on mutually opposite sides (28) a plurality of outwardly projecting protrusions (29) which are spaced apart from each other in the longitudinal direction (30) of the exhaust gas pipes (7).
A simplified cooling effect can be achieved if, with in each case two adjacent exhaust gas pipes (7), the protrusions (29) of one exhaust gas pipe (7) bear in each case directly against the other exhaust gas pipe (7) at a distance in the longitudinal direction (30) of the exhaust gas pipes (7) from the nearest protrusion (29) of the other exhaust gas pipe (7).
15 Citations
22 Claims
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1. An exhaust gas recirculation system cooler, comprising:
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an exhaust gas inlet connected to and in fluid communication with an inlet chamber; an exhaust gas outlet connected to and in fluid communication with an outlet chamber; a plurality of generally flat exhaust gas pipes extend parallel to each other through a coolant chamber and are in fluid communication with the inlet chamber on one side and to the outlet chamber on an opposite side; a coolant inlet connected to and in fluid communication with the coolant chamber; and a coolant outlet connected to and in fluid communication with the coolant chamber, wherein the exhaust gas pipes include a plurality of outwardly projecting protrusions spaced apart from each other in a longitudinal direction of the exhaust gas pipes, wherein the protrusions of one exhaust gas pipe bear directly against an adjacent exhaust gas pipe at a distance in the longitudinal direction of the exhaust gas pipes from the nearest protrusion of the other exhaust gas pipe; wherein the exhaust gas pipes have a plurality of inwardly projecting depressions on opposite sides, such that the depressions are at a distance from each other in the longitudinal direction of the exhaust gas pipes; wherein the protrusions of one exhaust gas pipe bear against the other exhaust gas pipe in a region of at least one depression of the other exhaust gas pipe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification