Method and device for enhancing the tightness of a valve seat of a secondary air valve of a Sekundärluftzuführeinheit

摘要

Method for increasing the tightness of a valve seat of a secondary air valve of a Sekundärluftzuführeinheit an internal combustion engine, especially during on-board diagnosis in the secondary air phase, characterized in that a control chamber (13) of a valve closing member (18) of the secondary air valve (6) is acted upon by overpressure.