Robert Boschgmbh

Gerhard Meier

Friedrich Boecking

Andreas Dutt

Walter Fuchs

Eberhard Maier

Bernd Haeusser

Armin Merz

Jochen Aleker

Arnold Gente

Matthias Greiner

Alfons Schoetz

Markus Schetter

Florian Fritz

Markus Majer

Martin Hoeller

Frank Scholz

Johannes Muellers

Namik Karaosmanoglu

Werner Vallon

Frank Maurer

Markus Kunz

Thomas Ginsel

Dominik Meinzer

The invention relates to a roller tappet () for a piston pump, in particular for a high-pressure fuel pump, for supporting a pump piston () which can move in a reciprocating motion on a cam () or eccentric of a drive shaft (), comprising a tappet body () with an end-side recess () and two radial bores () which lie diametrically opposite one another at the recess () and receive a pin (), on which a roller () is rotatably mounted directly or indirectly via a bearing bush (), wherein at least one radially or obliquely running feed bore () is configured in the tappet body () in order to supply a lubricating medium to a radial bearing gap () which is configured between the roller () and the pin () or between the roller () and the bearing bush (), which feed bore () opens into the recess () in the region of an axial bearing gap () between the roller () and the tappet body (). According to the invention, the feed bore () is connected to an arcuately running lubricating duct () which is configured in a surface () of the tappet body (), which surface () delimits the axial bearing gap (). Furthermore, the invention relates to a piston pump comprising a roller tappet () of said type.

Roller tappet for a piston pump, piston pump

Disclosed is a pump, in particular a high-pressure fuel pump, comprising at least one pump element () that has a roller tappet () inside which a roller () is rotatably mounted on a bearing bolt () by means of a bearing sleeve (), said roller () rolling off a cam () of an input shaft (). The bearing sleeve () is made of a plastic material, especially polyether ether ketone (PEEK) or polyphthalamide (PPA).

Pump, in particular high-pressure fuel pump

The present invention relates to a delivery pump, in particular for delivering diesel fuel into a high-pressure accumulator. The pump has a housing and a drive shaft which is accommodated in the latter and is mounted by at least one sliding bearing arrangement such that it can rotate about a drive shaft axis. The sliding bearing arrangement is formed by a bearing bore and a bearing shaft section which extends through the latter. The sliding bearing arrangement has a bearing play which extends in the radial direction between the bearing shaft section and the bearing bore and has a smaller value in the bearing center than at least one bearing edge. A delivery pump for delivering diesel fuel is therefore provided which has a low-wear sliding bearing arrangement.

Supply pump, in particular for supplying diesel fuel, with improved bearing of the drive shaft

A high-pressure pump having a housing containing at least one pump element that has a pump piston driven by a drive shaft; the piston is guided so that it can slide in a cylinder bore of a housing part and delimits a pumping chamber therein. A support element supports the pump piston against the drive shaft; and a prestressed return spring acts on both the pump piston and the support element in the direction toward the drive shaft. The support element is guided so that it can slide in a receptacle, which is contained in the housing part that also contains the cylinder bore, in the direction of the longitudinal axis of the pump piston, but cannot rotate around the longitudinal axis.

High-pressure pump, in particular for a fuel injection system of an internal combustion engine

A high-pressure pump has at least one pump element including a pump piston defining a work chamber and driven at least indirectly by a drive shaft in a reciprocating motion, counter to the force of a restoring spring. The pump piston is braced on the drive shaft at least indirectly via a sleevelike tappet, and the restoring spring engages at least the pump piston. A support element in the tappet braces the pump piston toward the drive shaft and is braced at least indirectly on the drive shaft. The restoring spring, via a spring plate, engages the pump piston and the tappet. The spring plate is elastically deformable in the direction of motion of the pump piston in such a way that as a result of its elastic deformation, deviations in the position of its contact faces on the pump piston and on the tappet are compensated for.

High-pressure pump, in particular for a fuel injection device of an internal combustion engine

Growing community of inventors

Schorndorf, Germany

Gerhard Meier