METHOD FOR REGULATING DEGREE OF ENRICHMENT IN INTERNAL COMBUSTION ENGINE WITH CONTROLLED IGNITION Russian patent published in 2021 - IPC F02D41/14 

FIELD: internal combustion engines.

SUBSTANCE: invention relates to a method for regulating the degree of enrichment of an air-fuel mixture in an internal combustion engine with controlled ignition. Near the full load, the degree of enrichment is adjusted according to the first value (r₁) of the degree of enrichment for pre-cooling of exhaust gases. When the temperature (θ_ech) of exhaust gases reaches the first threshold (θ₁) of the temperature, which is lower than the second threshold (θ₂) of the temperature, the value of the degree of enrichment is increased gradually, for example linearly, from the first value (θ₁) of the degree of enrichment to the maximum of the second value (r₂) of the degree of enrichment, at which the temperature of exhaust gases is equal to the second threshold (θ₂) of the temperature. If the temperature (θ_ech) of exhaust gases reaches the specified second threshold (θ₂), before the degree of enrichment reaches the second value (r₂) of the degree of enrichment, the degree of enrichment is immediately adjusted to the specified second value (r₂) of the degree of enrichment.

EFFECT: increase in the reliability of the internal combustion engine by limiting the temperature of parts forming the exhaust circuit under heavy load.

6 cl, 2 dwg