Patent ID: 7882698

Claim:
An internal combustion engine apparatus having an internal combustion engine, the apparatus comprising: an exhaust gas purifying unit which is provided in an exhaust system of said internal combustion engine and which includes a purifying catalytic section having a purifying catalyst for purifying an exhaust gas; a fuel gas adsorbing section having a fuel gas adsorbent for adsorbing a fuel gas in the exhaust gas; and a passage switching section for switching between a first passage for passing the exhaust gas mainly to said purifying catalytic section and a second passage for passing all the exhaust gas through said fuel gas adsorbing section to said purifying catalytic section; a misfire judgment unit for judging whether or not a misfire occurs in any cylinder of said internal combustion engine; and an in-misfire switching control unit for controlling said passage switching section such that when said misfire judgment unit judges that a misfire occurs in any cylinder of said internal combustion engine, said passage switching section passes the exhaust gas to said second passage.