Patent ID: 8042327

Claim:
An exhaust purification device of an internal combustion engine, wherein a catalyst able to purify NO x is arranged in an engine exhaust passage, an NO x adsorbent adsorbing NO x in exhaust gas is arranged in the engine exhaust passage downstream of the catalyst, an NO x removal solvent supply device supplying an NO x removal solvent for removing by dissolution NO x adsorbed by the NO x adsorbent is provided, an NO x -containing solvent supply device supplying an NO x -containing solvent containing the NO x removed by dissolution from the NO x adsorbent into the engine exhaust passage upstream of said catalyst is provided, NO x discharged from the engine is adsorbed by said NO x adsorbent after the engine starts up until said catalyst is activated, the NO x -containing solvent is supplied from the NO x -containing solvent supply device into the engine exhaust passage when said catalyst is activated, and NO x in the NO x -containing solvent supplied at this time is purified in said catalyst.