Patent ID: 8166752
Filing Date: 2012-05-01
Classification: F01N,Y02T

Abstract:
1. An exhaust gas cooling apparatus, comprising: a first fluid conduit; a variable nozzle defining an opening disposed at one end of the first fluid conduit, the variable nozzle being defined by a shape memory alloy extending from the first fluid conduit; and a second fluid conduit having an inlet end and an outlet end, the variable nozzle being disposed in the second fluid conduit proximate to the inlet end of the second fluid conduit such that a fluid inlet opening is disposed about an outer periphery of the variable nozzle and an inner surface of the inlet end of the second fluid conduit, the shape memory alloy varying the size of the variable nozzle opening by moving toward or away from a center line of the first fluid conduit in response to a temperature of an exhaust gas flowing through the first fluid conduit, such that the fluid inlet opening increases in area when the variable nozzle moves toward the center line of the first fluid conduit and the fluid inlet opening decreases in area when the variable nozzle moves away from the center line of the first fluid conduit.