Patent ID: 9488081
Filing Date: 2016-11-08
CPC Classification: F01N,F02B,Y02T

Claim Text:
1. An exhaust manifold assembly comprising: an exhaust runner having an inlet configured to receive a first flow of an exhaust gas from an internal combustion engine, a flow direction of the first flow of the exhaust gas defining an axial direction of the exhaust manifold assembly; an exhaust nozzle fluidly coupled to the exhaust runner, an outlet aperture of the exhaust nozzle being defined by an intersection of a tip flow passage and an internal surface of the exhaust runner, the outlet aperture of the exhaust nozzle being configured to introduce a second flow of the exhaust gas into the first flow of the exhaust gas; an impingement zone of the exhaust runner defined by a projection of the outlet aperture onto the internal surface of the exhaust runner in a direction of the second flow of the exhaust gas; a water jacket assembly disposed circumferentially about the exhaust runner; a solid insulation layer disposed between the exhaust runner and the water jacket assembly along a radial direction of the exhaust manifold assembly, the radial direction being perpendicular to the axial direction; and a gaseous insulation layer disposed between the exhaust runner and the water jacket assembly along the radial direction, the solid insulation layer having a first solid thickness along the radial direction at an axial location that is collocated with the impingement zone, the gaseous insulation layer having a first gaseous thickness along the radial direction at the axial location that is collocated with the impingement zone, the first gaseous thickness being greater than the first solid thickness.