FIELD: motors and pumps.
SUBSTANCE: method of fuel supply control is proposed, which consists in that the fuel pressure is formed using the high pressure fuel pump, the fuel is supplied to the high-pressure hydraulic accumulator, and a certain pressure level is established therein using the high-pressure control valve, the fuel is supplied to each injector at the pressure set for all injectors from common high pressure hydraulic accumulator, the fuel is supplied under the needle and to the camera above the needle, during injection the fuel from the camera above the needle is sent for draining through the duct, which is opened by the injector control valve with piezoelectric drive, due to the difference of pressures above and below the needle the needle lifted and fuel is injected, the control valve is closed, the fuel is supplied under high pressure to the camera above a needle, the needle is shifted to the seat due to high-pressure, effecting the needle from above. Using the proposed method it is possible to perform at least one preliminary injection, at least one main injection and at least one injection after the main one. Besides the device for implementation of the fuel supply control method is offered.
EFFECT: improvement of precision of dosing of amount of injected fuel and optimization of the fuel combustion process.
2 cl, 3 dwg
