Device and method for locking a drive shaft disposed in a fuel injection pump for internal combustion engines and holding bolt therefor

US4499757A · kind A · utility

Inventors

• Egbert Backe · Markgröningen, DE
• Rolf Muller · St. Georgen, DE
• Dieter Otto · Achern, DE
• Cornelio Leonardi · Stuttgart, DE
• Heinrich Kochendorfer · Weingarten, DE
• Paul Fussner · Sindelfingen, DE
• Ewald Walker · Kornwestheim, DE
• Rudi Rommel · Durmersheim, DE

Key dates

• Filing date: Nov 1, 1982
• Grant date: Feb 19, 1985
• Expiry date: Nov 1, 2002

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M59/44
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An element firmly connected with the drive shaft of an injection pump is locked in a predetermined rotary position, corresponding to the supply onset, by a locking device before the mounting of the injection pump to the associated internal combustion engine, the locking being effected by means of a holding bolt embodied as a reversible part. The holding bolt, locked by a fastening means in a reception bore, engages a transverse groove on the end face, in a first mounting position, via a protrusion on the element firmly connected with the drive shaft, and thus establishes a form-locking connection which keeps the drive shaft in the predetermined rotary position. In a second mounting position of the holding bolt, where the transverse groove points outward, the rotary movement of the drive shaft is unhindered. By means of the locking device, an injection pump can be mounted on an engine in the correct association with the drive mechanism of the engine without additional expenditure being required for measurement and testing.