Patent ID: 6151891
Filing Date: 2000-11-28
Classification: F01N,F28D,Y02A,Y02T

Abstract:
A heat exchanger for a motor vehicle exhaust, comprising:an outer tubular body having peripheral sidewalls, an interior cavity, a first end and a second end;an inner tubular body having fluid impervious sidewalls formed out of a single length of conduit wound in a spiral coil, the spiral coil having an exterior surface and an interior surface, the inner tubular body disposed within the interior cavity of the outer tubular body spaced from the peripheral sidewalls, thereby providing a first flow channel between the exterior surface of the inner tubular body and the peripheral sidewalls of the outer tubular body, and a second flow channel along the interior surface of the inner tubular body;the conduit of the spiral coil having an inlet end and an outlet end, whereby fluid is circulated through the coil;an exhaust pipe connection at each of the first end and the second end of the outer tubular body, whereby exhaust from an exhaust pipe is diverted through the interior cavity of the outer tubular body.