Patent ID: 8056327
Filing Date: 2011-11-15
Classification: F01N,Y02T

Abstract:
1. An exhaust gas-cooling device for use on an exhaust gas conveyance system of a vehicle having an exhaust gas passageway to emit exhaust gases from an engine to an outlet, the exhaust gas passageway being in fluid communication with air from the ambient, comprising: an exhaust passageway pipe in fluid communication with the engine; a micro-venturi mixing chamber pipe having a first end in fluid communication with and located downstream of the exhaust passageway pipe, and a second end defining the outlet of the exhaust gas-cooling device, the exhaust passageway pipe and the micro-venturi mixing chamber pipe being joined to form a closed channel at the junction; at least one aperture disposed on the micro-venturi mixing chamber pipe; an ambient air intake pipe that is at least partially disposed within the exhaust passageway pipe, the ambient air intake pipe being disposed upstream of the micro-venturi mixing chamber pipe, the ambient air intake pipe has at least one side opening in the exhaust passageway pipe that is directly open to the ambient and is unenclosed; and a constriction portion disposed at the junction of the exhaust passageway pipe and the micro-venturi mixing chamber pipe, wherein when the exhaust gas flows through the constriction portion, the pressure at the micro-venturi mixing chamber pipe is reduced from the pressure upstream of the constriction portion, and the ambient air is drawn into the micro-venturi mixing chamber pipe from the at least one aperture.