FUEL INJECTION VALVE FOR INTERNAL COMBUSTION ENGINES Russian patent published in 2025 - IPC F02M47/02 F02M63/00 F02M61/16 F02M51/06 

FIELD: machine building.

SUBSTANCE: invention can be used in fuel feed systems of internal combustion engines. Fuel injection valve (10) has hydraulic control device (72) to control axial movement of injection valve link (56). Rod (76) of intermediate link (78) of intermediate valve (83) made in the form of a mushroom is installed in guide recess (74) of intermediate part (66). Valve intermediate link (78) releases, in open position, second connection (118, 117, 96) between high-pressure fuel supply (86) and valve chamber (44) and interrupts second connection (118, 117, 96) between supply (118, 117, 96) in closed position (86) of high-pressure fuel and valve chamber (44). Intermediate valve link head (80) adjoins intermediate valve link (78) with its side facing intermediate part (66) along first radial distance (r1) around rod (76) or guide recess (74) of first sealing surface (111.2) to form a first circumferentially closed annular sealing surface (121) and along a second radial distance (r2) around rod (76) or guide recess (74), second sealing surface (112.2) to form a second annular sealing surface (122) closing in the circumferential direction to seat (82) of the intermediate valve, wherein the first radial distance (r1) is greater than the second radial distance (r2).

EFFECT: invention is aimed at simplifying the design of the fuel injection valve while providing the possibility of reliable control of the opening movement of the fuel injection valve link and ensuring the fast closing process of the injection valve link.

32 cl, 8 dwg