Patent ID: 6330910
Filing Date: 2001-12-18
Classification: F01N,F01P,F28D,F28F,Y02T

Abstract:
A heat exchanger for a motor vehicle exhaust, comprising:a tubular body having a first end, a second end, a peripheral sidewall, and at least two flow passages that extend between the first end and the second end, the at least two flow passages including at least one heat exchange fluid flow passage and at least one bypass fluid flow passage;a heat exchange coil positioned in the at least one heat exchange fluid flow passage, the heat exchange coil having an inlet and an outlet extending through the sidewall of the tubular body;at least one valve for selecting between the at least one heat exchange fluid flow passage and the at least one bypass fluid flow passage; andan insulated dual wall positioned between the at least one heat exchange fluid flow passage and the at least one bypass fluid flow passage.