METHOD OF FEEDING GASEOUS FUEL INTO AN INTERNAL COMBUSTION ENGINE Russian patent published in 2020 - IPC F02B43/02 F02B43/04 F02B43/06 F02B43/12 F02D19/02 F02M21/02 

FIELD: machine building.

SUBSTANCE: invention relates to power and transport machine building, particularly, to methods of gas fuel supply to internal combustion engine. Disclosed is a method of feeding gaseous fuel into an internal combustion engine, comprising feeding gas fuel through nozzles in an amount of one to four per each cylinder into the engine intake pipeline when the pressure difference on the valves of the nozzles is equal to or greater than critical, wherein nozzles for injection of gas fuel is used as an active element for air ejection in inlet pipeline, and the gas fuel is supplied during the period of open state of the inlet valve, differing by the fact that the supply of gas fuel is stopped in 5–110 degrees on the position of the crank shaft till the inlet valve is completely closed. Gas fuel supply termination angle, as to the crankshaft position, is increased as the crankshaft rpm increases and is reduced when the crankshaft rpm is decreased. Supply of gas fuel is started for 5–110 degrees on the position of the crankshaft till the exhaust valve is fully closed. Gas fuel is supplied at distance from 2d to 6d from inlet valve along central axis of fuel-air mixture movement, where d is internal diameter of inlet pipeline. At increase of crankshaft rotation frequency and load (torque and power) of internal combustion engine increasing number of nozzles from one to four per each cylinder participating in cyclic supply of fuel, and at reduction of crankshaft rotation speed and load is reduced. By increasing the speed of the air-fuel mixture before the inlet valve, increasing the filling of the cylinder of the internal combustion engine, wherein the cylinder relative ratio at low speeds of the crankshaft increases more than at high speeds of rotation of the crankshaft, and this, in its turn, increases power and torque in comparison with gas fuel supply without use of ejector compressor, which is represented by fuel injector.

EFFECT: by reducing the amount of gas fuel in the inlet pipeline, the safety of the internal combustion engine operation is improved, since the "clapping" effect in the inlet pipeline is prevented due to the absence of an explosive mixture of fuel and air; due to maximum flow rate at critical or supercritical pressure drop on nozzle valve maximum air ejection effect by means of gas fuel is achieved; due to optimum start of gas fuel supply its emissions into atmosphere are eliminated in the period of cylinder blowing with simultaneously open inlet and outlet valves.

7 cl, 5 dwg