HIGH-PRESSURE FUEL PUMP FOR COMPARISON TESTS OF PUMPS ELEMENTS RUNNING ON TWO ENGINE FUELS Russian patent published in 2012 - IPC F02M65/00 G01M10/00 

FIELD: machine building.

SUBSTANCE: proposed pump comprises: housing 1, pump sections 2-5, fuel feed pump 8 and second fuel feed pump 15, first and second "П"-shaped channels 12, 13, respectively, and baffles 11. There may be four, or six, or eight, or twelve pump sections. Pump sections 2-5 comprise bushes 6 and plungers 7. Said bushes are communicated via "П"-shaped channels. The latter are made at top section of housing 1 and feature equal length and cross-section. Baffles 11 separate aforesaid first and second "П"-shaped channels. The following components are arranged at outlet of said channels: bypass valve 10 and second bypass valve 14. Fuel feed pumps 8, 15 are mounted on housing 1 to be communicated via low-pressure fuel line 16 with inlet of said "П"-shaped channels. Said low-pressure fuel lines feature equal sizes. Delivery of fuel feed pumps 8, 15 is equal to make 1.15-1.18 cm³/rev at cycle frequency of 16.7 Hz. Operating pressure of bypass valves 10, 14 equals 0.08-0.12 MPa.

EFFECT: equal test conditions for both fuel types.

1 dwg