DEVICE FOR EXHAUST GAS EMISSION CONTROL FOR INTERNAL COMBUSTION ENGINE Russian patent published in 2017 - IPC F02D41/04 

FIELD: engine devices and pumps.

SUBSTANCE: controlling the enrichment of mixture to temporarily degrade the composition of air-fuel mixture of exhaust gas discharged from the combustion chamber of engine is performed by injecting additional fuel into the cylinder in the expansion stroke or the exhaust stroke in a state in which the throttle opening ratio is switched from the base throttle opening ratio to the degree of opening of the throttle to control the enrichment of mixture, and the EGR share is switched from the base EGR share to the EGR share to control the enrichment of mixture. The mixture enrichment control is completed by returning the throttle opening degree (TOD) to the throttle opening (TODB) base level degree, stopping the additional fuel injection (Qa), and temporarily increasing the main fuel volume (Qm). Then, the opening of the EGR control valve (VEGR) is controlled so that the EGR-rate (REGR) returns to the base EGR-rate (REGRB).

EFFECT: suppression of fluctuations in the output power of the motor immediately after the control of mixture enrichment is completed.

17 cl, 45 dwg