Patent ID: 7363883
Filing Date: 2008-04-29
Classification: F02D,F02M,G06Q,Y02P,Y02T,Y04S

Abstract:
1. A gas engine electric power generating system comprising: an electric power generating apparatus including an electric power generator coupled to a pilot fuel oil ignition type gas engine having at least one cylinder and a cylinder pressure detector; a combustion diagnosis apparatus for diagnosing a combustion condition within the gas engine in response to a cylinder pressure detector signal; a combustion controller that adjusts a fuel mixture comprising recovered methane gas having a methane concentration of 30-50% and ventilated methane gas having a methane concentration of 0.3-0.7% in the gas engine in response to a combustion condition signal from said combustion diagnosis apparatus; and a gas injection device that provides the fuel mixture for introduction into the cylinder while mixing the recovered methane gas and the ventilated methane gas to define a lean methane/air mixture having a methane concentration of 3-5% and having an air excess ratio not less than 2, such that the gas engine operates to produce electric power.