FIELD: gas internal combustion engines. SUBSTANCE: invention specifically refers to devices measuring advance angle of supply of fuel gas into gas motocompressors and other gas internal combustion engines having gas inlet valve with drive from crankshaft or from distribution shaft with lower (side) arrangement. Acousto-stroboscopic device incorporates power supply source 1 connected to limiting resistor 2 and amplifier 3 to which thyristor 4 is connected. Thyristor 4 is connected on one side to limiting resistor 2 via reservoir capacitor 5 and on the other side - to pulse no-inertia stroboscopic lamp 7 via pulse transformer 6. Microphone 8 is connected to amplifier 3. Novelty of proposed device lies in insertion of additional thyristor with amplifier and microphone connected to controlling electrode of thyristor via amplifier to measure advance angle of supply of fuel. EFFECT: increased measurement accuracy of acousto-stroboscopic device. 1 dwg
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