HIGH-PRESSURE FUEL-INJECTION PUMP Russian patent published in 1998 - IPC

FIELD: mechanical engineering; diesel engines; fuel systems. SUBSTANCE: fuel-injection pump has camshaft 2 with cam 3 and barrel 4. Tappet 6 of plunger 8 arranged in barrel 4 rides cam 3. Barrel 4 has filler hole 9, and plunger 8, hole 10, ring groove 11 straight edge 12 ands bevelled edge 13. Control sleeve 16 is installed on shank of barrel 4. Control sleeve 16 is mechanically coupled with control rack 17. Control sleeve 16 engages with plunger 8. Tapper 6 has guide portion 20, support portion 21, rotary disk 22 and bushing 23. Support portion 21 of tappet 6 has taper surface 24, guide portion 20 of tappet 6 is provided with radial grooves 25, and rotary disk 22 is provided with through slots 26. Balls 27 are arranged in slots 26 and grooves 25. Bushing 23 of tappet 6 installed in pump housing 1 is mechanically coupled with phasing rack 28. Bushing 23 has guide surface 29 engaging with guide surface 30 of rotary disk 22. EFFECT: enhanced accuracy of fuel feed by provision of control of fuel injection advance angle. 3 dwg