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Method of Improving Performance of Emission Control Devices by Controlling Exhaust Oxygen Content

Abstract: 

A method of providing extra air to the exhaust stream of an internal combustion engine. A small flow of air is diverted from the output of an air-charging device, such as a turbocharger, to an entry point upstream of an emission control device. The air is supplied in a controllable fashion so as to improve the efficiency of the emission control device.

Patent Number: 
7,162,861
Date Of Issue: 
01/16/2007
Inventors: 

Magdi K. Khair