Patent ID: 6811756
Filing Date: 2004-11-02
Classification: F01N,F28D,F28F,Y02T

Abstract:
An exhaust gas cooler comprising:an external tube arranged on a longitudinal axis and having first and second end walls within said tube, said external tube and end walls defining a coolant chamber between said end walls and first and second exhaust gas chambers outside said first and second end walls respectively, coolant inlet and outlet means communicating with said coolant chamber, a plurality of internal tubes extending from said first end wall to said second end wall and arranged such that the interior of each internal tube communicates with said first and second exhaust gas chambers, and exhaust gas inlet and outlet means communicating with said first and second exhaust gas chambers respectively, whereby the exhaust gas inlet and outlet means are each axially arranged on the longitudinal axis of the external tube; characterised in that the external tube has a cross-sectional shape which has a height in the major axis which is greater than its width in the minor axis perpendicular to the major axis.