Fuel pump, for internal combustion engine with direct fuel injection, has housing with drive shaft, at least one bearing section, one drive section and first recess in which section and drive section of drive shaft are accommodated

摘要

The fuel pump (10), particularly for an internal combustion engine with direct fuel injection, has a housing (12) with a drive shaft (14), at least one bearing section, at least one drive section and a first recess (24) in the housing in which the bearing section and the drive section of the drive shaft are accommodated. At least one delivery component (16) is arranged in a second recess (42) in the housing, from which at least a drive section (32) of the drive shaft is directly set in movement and serves for delivery of fuel. In operation, in a hollow chamber (27) between the first recess (24) and the sections of the drive shaft, a lubricant (82), different from the fuel being fed, is available. A device is provided (72,78), which holds the pressure of the lubricant at a specific level.