Abstract
Diesel Particulate Filter (DPF) regeneration requires high exhaust gas temperature by post -injections, which causes issues of fuel penalty and emissions. Therefore, it is desirable to shorten the DPF regeneration period. Ag catalysts by conventional coating method can’t exhibit their capabilities expected, due to their poor contact between PM and catalysts. To improve PM-catalysts contact condition, a new coating method which enables to achieve “tight contact” between PM and catalysts was developed. Abnormal temperature rising characteristic accompanying improvement in PM combustion performance was able to coexist by adjusting coat length in DPF. This method enables to promote DPF regeneration, making improve fuel economy and emissions.
