Patent ID: 8043566
Filing Date: 2011-10-25
Classification: G01N,Y10T

Abstract:
1. An emissions system comprising: (a) an internal combustion engine that emits as exhaust a multi-component gas mixture; (b) gas transmission equipment to direct the gas mixture from the engine to an array of at least four chemo/electro-active materials, each chemo/electro-active material exhibiting a different electrical response characteristic, upon exposure at a selected temperature to the gas mixture, than each of the other chemo/electro-active materials; wherein the array of chemo/electro-active materials comprises Ga wherein a, b and c are each independently about 0.0005 to about 1; and x is a number sufficient so that the oxygen present balances the charges of the other elements in the compound; (c) means for determining the electrical response of each chemo/electro-active material upon exposure of the array to the gas mixture; and (d) means for detecting the presence of, or calculating the actual concentration of, one or more individual component gases and/or subgroups within the gas mixture from the electrical responses of the chemo/electro-active materials inputted thereto.