FIELD: engines and pumps.
SUBSTANCE: funnel arranged at engine intake system is used as resonator. Note here that engine crankshaft rpm is selected wherefrom funnel starts increasing amplitude of air wave, for example, 3000 rpm or 8000 rpm. Air wave oscillation frequency in intake system is calculated. Proceeding from obtained frequency aforesaid funnel is sized to define: mouth area, opening area, total length, formula and coefficient of opening per length. Note here that said obtained frequency is funnel operating frequency.
EFFECT: higher engine efficiency.
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