Fuel-injection pump

US5685274A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Peter Helmbrecht · Jeffery Road, DE
• Wolfgang Fehlmann · Stuttgart, DE
• Gerold Schultheiss · Pforzheim, DE
• Dieter Junger · Stuttgart, DE
• Bodo Kebrich · Merzweiler, DE
• J. Paul Morel-Fourrier · Valencin, FR

Key dates

• Filing date: Jun 29, 1995
• Grant date: Nov 11, 1997
• Expiry date: Jun 29, 2015

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D3/04
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel-injection pump of the distributor type has a distributor shaft which is coupled fixedly in terms of rotation to a drive shaft and which, during rotation, successively supplies an injection nozzle with fuel from a pump working space. Seated displaceably in each case in one of a plurality of radial bores in the distributor shaft are pump pistons which, on the one hand, limit the pump working space and, on the other hand, bear non-positively on a coaxial cam ring via rollers held in roller shoes. For a construction of the injection pump which is advantageous in manufacturing terms, the drive shaft engages over the distributor shaft by means of a cup-like coupling head, and a number corresponding to the number of radial bores, of axial slots for the displaceable reception of the roller shoes are made in the cup wall. The coupling takes place via a coupling disk which is seated positively in the axial slots by means of radially projecting coupling webs and which positively receives in a recess an end projection on the distributor shaft.