ENGINE GAS-AIR MIX FEED SYSTEM Russian patent published in 2012 - IPC F02M21/02 

FIELD: engines and pumps.

SUBSTANCE: proposed system for gas and diesel ICE comprises gas source 1, controlled electromagnetic has injectors 7, electronic device to control fuel feed amount and moment, gas fuel feed line, gas accumulator 3 and air intake line. Gas fuel feed line comprises pipeline, pressure control valve 2 and gas-air mixers 5. Gas accumulator 3 allows compensating gas feed irregularities and is mounted between gas pressure control valve 2 and controlled injectors 7. Gas accumulator volume is defined from the equation:

where V_A is gas accumulator volume in m³; ρ_A is natural gas density at injector operating pressure, kg/m³; ρ₀ is natural gas pressure on flowing into engine cylinders, kg/m³; V₀ is natural gas volume for fuel reserve in accumulator at ρ₀ m³; V'_c.g. is maximum cyclic gas feed into all engine cylinders m³; p is gas density in operating conditions, kg/m³; p is gas pressure in operating conditions, MPa; T is gas temperature in operating conditions, °K; p_s is gas density in standard conditions, kg.m³; T_s is ambient temperature in standard conditions, °K; p_s is ambient pressure in standard conditions, MPa, K_c is compressibility factor. Inlet air pipeline to each engine channel 6 features equal length.

EFFECT: maintenance of constant natural gas pressure upstream of injectors and synchronisation of gas-air mix oscillations.

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