Patent ID: 8051643

Claim:
An exhaust gas purification system, comprising: a trapping device arranged on an engine exhaust passage that traps particulate matter in the exhaust gas; an ozone generator that generates ozone; an ozone adsorbent structured to adsorb ozone; a main passage leading from ozone generator through the ozone adsorbent to the trapping device; and an exhaust flow controller that controls a flow of the exhaust gas; wherein: at least part of the ozone generated by the ozone generator is adsorbed by the ozone adsorbent; and when an amount of the particulate matter trapped on the trapping device exceeds a predetermined amount, the exhaust gas flow controller controls the exhaust gas to flow into the ozone adsorbent thereby causing the ozone adsorbed on the ozone adsorbent to be desorbed from the ozone adsorbent and supplied to the trapping device.