HIGH PRESSURE FUEL PUMP Russian patent published in 2015 - IPC F02M59/44 

FIELD: motors and pumps.

SUBSTANCE: invention can be used during manufacturing of HP fuel pumps of internal-combustion engines. HP fuel pump has body (1), plunger insert (14), plunger (16) with return spring (19), drive (3) of plunger (16) reciprocating movement, discharge valve (17), HP cavity (36) and channels (37) creating fuel hydraulic accumulator, and LP cavities (23) and channels (24). Fuel pump additionally contains a slide valve (27) installed with possibility of connection and disconnection of LP cavity (23) and above plunger cavity (26) during its direct and reverse movements. At that the slide valve (27) is spring-loaded towards connection of the specified cavities, ant its end face from HP cavity (36) side limits volume creating the spring hydraulic accumulator.

EFFECT: volume decreasing of the hydraulic accumulator.

8 cl, 2 dwg