| 摘要 |
PURPOSE: A DPF(Diesel Particulate Filter) damage detection device for LPEGR(Low Pressure Exhaust Gas Recirculation) vehicles and a method thereof are provided to prevent a decrease of the turbocharger and intercooler efficiency with replacing and fixing a damaged DPF in early stage. CONSTITUTION: A DPF(Diesel Particulate Filter) damage detection device for LPEGR(Low Pressure Exhaust Gas Recirculation) vehicles comprises a turbine(1), a turbocharger, a DPF(2), a LPEGR valve(5), a LPEGR cooler(8), an emergency filter(9), and a differential pressure detection unit(14). The turbine is rotated with exhaust gas. A compressor(7) of the turbocharger supercharges air to an engine through an intercooler after sucking the air by interlocking with rotation of the turbine. The DPF purifies the exhaust gas discharged through the turbine. The LP EGR valve is installed on a rear end of the DPF. A pipeline(6) is connected to the LPEGR valve and compressor. The LP EGR cooler is installed in the middle of the pipeline. The differential pressure detection unit detects the differential pressure between an exhaust pipeline(12) and the rear end of the emergency filter.
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