| 摘要 |
A heavy oil fuel injection pump having a lubrication oil groove (6, 11) in the pump piston (2) and/or on the inside wall of the pump piston bushing (1). The lubricating oil is supplied through a bore (7) to one side of the lubrication oil groove (6) and is discharged from the side opposite the supply side, in a manner which is controlled by the pump piston. In the embodiment shown oil leaves the groove (6) when the groove (11) is in alignment, a groove (10) providing a discharge flow path. The lubricating oil thus flows in directed flow through the Iubrication oil groove (6) and leaves it in a pulsed manner. The flow-through cross section of the lubrication oil groove (8) is preferably a maximum of 100% and in particular a maximum of 50%, of the cross section of the supply bore (7). The dwell time of the lubricating oil in the lubrication oil groove is shortened, and deposits are thus reduced or avoided. Several other embodiments are described. <IMAGE> |
