| 摘要 |
<p>PURPOSE:To execute the purging of the specified volume when the specified light load is judged, and to enable the purging of large volume by supplying the secondary air before the catalyst converter in the system to control the purging volume of the evaporated fuel to the suction system according to the running condition of an engine. CONSTITUTION:The evaporated fuel taken out at an evaporated fuel taking-out part 11 including a fuel vapor valve is adsorbed by and stored in a canister 12, and the adsorbed fuel is sucked by a suction system 14 by opening a solenoid valve 13. In order to prevent the deterioration of the emission due to the rich condition caused by the purging of the evaporated fuel, a secondary air supplying part consisting of an air pump 19 and an air control valve 18 is provided. In an ECU 20, a judgement is made whether or not the feedback region is provided from the engine speed and the load, and if in the case of NO, the purging control duty correction value is maximized in the light load region to execute the purging of large volume, and at the same time, the secondary air is supplied to improve the cleanup ratio of NOx.</p> |
