FIELD: machine building.
SUBSTANCE: invention discloses use of combination of a) at least one detergent - Mannich base, and b) at least one polyisobutyleneamine for improving control of formation of deposits on a valve from a fuel composition in an internal combustion engine with direct injection of fuel with spark ignition, wherein the valve is an air inlet valve, an exhaust valve or an exhaust gas recirculation system valve.
EFFECT: technical result consists in control of formation of deposits on valves, through which liquid composition does not pass in internal combustion engine with direct injection of fuel with spark ignition.
6 cl, 2 tbl, 9 ex
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