UNIT OF EXHAUST GAS RECIRCULATION

摘要

PURPOSE: An exhaust-gas re-circulating unit is provided to reduce an air pollution material since the amount of NOx is controlled and reduced in real time. CONSTITUTION: An exhaust-gas re-circulating unit comprises an engine(100), a bypass pipe(200), a turbo charger(300), an NOx(400) sensor and an EGR valve(500). The engine burns fuel and outputs energy. The bypass pipe sends some of the exhaust gas, which is discharged from the discharge unit of the engine, to the intake unit of the engine. The turbo charger absorbs the exhaust gas, which has been discharged from the discharge unit, and rotates a turbine. The turbo charger compresses the absorbed exhaust gas and sends it to the intake unit. The concentration of nitrogen oxide, which is contained in the exhaust gas of an NOx sensor, is changed to voltage and is sensed. The EGR valve is installed on the bypass pipe.