EMISSION REDUCTION SYSTEM AND METHOD OF DIESEL GAS DUAL FUEL SYSTEM

摘要

An exhaust gas control system for a diesel-gas fuel mixing combustion engine and a control method thereof are provided to increase the combustion efficiency of the engine and to improve the performance of exhaust gas and to decrease the air volume in the light loaded and heavy loaded section as well. An exhaust gas control system for a diesel-gas fuel mixing combustion engine comprises an air intake passage(31) and a vent passage(32); a fuel mixing combustion controller which controls the injection rate and injection timing of the diesel fuel and gas fuel; a gas injector which supplies gas fuel to the cylinder; a diesel injector which supplies diesel fuel to the cylinder; a turbocharger(2) which is connected to both air intake passage and vent passage; an intake air pressure sensor and an intake air temperature sensor which are equipped in the air intake passage; a broadband oxygen sensor detecting air-fuel ratio; a pedal location sensor measuring a pedal opening degree; an air bypass valve(21) which is equipped in an air passage(23); and an air bypass valve position sensor(22).