Radial piston pump
AssigneeSiemens Aktiengesellschaft
InventorsLudmilla Graf, Uwe Nigrin, Johann Schneider, Ngoc-Tam Vu
Life of this patent
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Abstract
The invention relates to a radial piston pump unit for a high pressure injection system with a pump housing in which a driveshaft with an eccentric section is mounted. A reciprocating ring sits on the above section and drives at least one spring-loaded piston which may be displaced in a direction radial to the drive axis. The driveshaft is embodied to comprise an end region which as a floating mounting and is also the drive for a fuel supply pump.
Claims19
A radial piston pump unit for high pressure injection systems, said unit comprising:
- a pump with pistons;
- a housing for housing said pump, said pump including a drive shaft for driving the pump pistons of the radial piston pump, said drive shaft having first and second end regions, wherein the second end region is a floating-mounted end region located within said housing adapted to drive a fuel pre-feeder pump providing fuel for said radial piston pump;
- and
- a bell cover comprising a volume flow control valve mounted to said housing.
An improved radial piston pump unit for high pressure fuel injection systems, said unit comprising:
- a radial piston pump, and a fuel pre-feeder pump, wherein said radial piston pump has a drive shaft for driving pump pistons, wherein said drive shaft is adapted to also directly drive the fuel pre-feeder pump, said adaptation comprising a floating-mounted end region having a saw toothed profile;
- and
- a bell cover comprising a volume flow control valve mounted to a housing of said radial piston pump.
A radial piston pump unit for high-pressure injection systems comprising:
- a pump housing having a drive shaft mounted therein, said drive shaft having an eccentric section with a reciprocating ring sitting thereon, said ring adapted for moving at least one spring-loaded pump piston of the radial piston pump, said spring-loaded pump piston displaceable in a direction radial to a drive axle, and
- a fuel pre-feeder pump connected with the radial piston pump, wherein the drive shaft has a floating-mounted end region, with a saw tooth profile, for driving the fuel pre-feeder pump;
- and
- a bell cover comprising a volume flow control valve mounted to said pump housing.
Dependencies are inferred from the claim text.