Internal combustion engine controller

摘要

The amount of fuel steam stored in the canister (12) or the amount of fuel steam supplied to the internal engine (1) according to the operating state and operation range of the engine (1) are calculated, and the purge control valve (13) and air-fuel ratio control characteristics, using this calculated value are adjusted; at the same time, appropriate control of the amount of fuel steam and purge control valve (13) when diagnosing the purge pipe system failure by application of pressure to the purge pipe system are provided. Thereby, both internal engine control with the minimum change in air-fuel ratio and purge control are ensured, and highly reliable diagnosis of the purge pipe system is realized. <IMAGE>