Process and device for regulating the richness of an air/fuel mixture feeding an internal-combustion engine.

摘要

The device according to the invention comprises an oxygen sensor placed in the stream of the exhaust gases of the engine 2 for supplying a bistable signal s lambda representing the richness of the air/fuel mixture in the engine. In the direct branch of the loop are a sampler 4 and a corrector 5 supplying a signal DELTA tid for correcting an estimated injection time ( @@@), the sum (ti) of these signals being sampled at 7 before the opening time of a fuel injector forming part of the engine 2 is controlled. According to the invention, at the moment of sampling the corrector 5 supplies an additive correction DELTA tidn which obeys a recurrent law taking the form of a linear combination of at least one of the values DELTA tidn-k of the corrections made at the immediately preceding moments of sampling and of the sampled values of the signal s lambda at at least one of these immediately preceding moments of sampling and at the current moment.