METHOD FOR OPERATION OF A DIESEL ENGINE DURING THE LAUNCHING AND POST-LAUNCHING PERIODS Russian patent published in 2023 - IPC F02M31/135 F02M53/06 F02N19/06 

FIELD: rotary engines.

SUBSTANCE: method for operation of a diesel engine during the launching and post-launching periods consists in preheating air and fuel in the atomizer (11) of the nozzle. The required thermal regime is provided with the help of a temperature sensor, a heater and a control unit and is maintained during the post-launching period, taking into account the thermal state of the engine. The air charge is heated in the engine cylinder during the intake and compression strokes. Part of the air charge in the compression stroke is overheated near the spray holes (10) of the atomizer (11) of the nozzle in the amount necessary for the formation of torches (12) of the fuel-air mixture. The heated fuel is injected into the volume of the superheated part of the air charge. The increased heat content of the superheated air charge in the torches (12) intensifies the processes of heating and evaporation of fuel droplets, conduct their calorific ignition around the outer surface of the cones of the torches (12). By the beginning of combustion, the pressure in the torches (12) is increased, the cone angle of the torches is increased and their deceleration in the combustion chamber is intensified. The rotating air charge takes out the flame, fuel vapors and drops from the burning torches (12) into the combustion chamber. The thermal energy of the burning fuel increases the temperature in the combustion chamber, intensifies the evaporation of droplets and the combustion of fuel in a larger amount. In the expansion stroke, the increased pressure of the combustion products of the fuel increases the torque and speed of its crankshaft. In the exhaust stroke, a reduced amount of unburned fuel reduces air pollution, dilution of engine oil by it, and preserves the engine resource with an increased indicator power. In subsequent cycles, the engine crankshaft is accelerated to a speed greater than the minimum stable idle speed and the start is completed. The fuel supply is established to ensure stable operation of the engine at idle, it is warmed up, when the injector nozzle reaches the limit temperature, its heating is stopped, when the engine is heated to the optimum temperature, the overheating of a part of the air charge is stopped, the calorific ignition of the fuel is stopped and it is transferred to work with self-ignition of the fuel.

EFFECT: intensifying evaporation and increasing the reliability of fuel ignition.

1 cl, 2 dwg