Fuel injection pump for internal combustion engines

US5146895A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Wolfgang Fehlmann · Stuttgart, DE
• Helmut Laufer · Gerlingen, DE
• Ewald Eblen · Stuttgart, DE

Key dates

• Filing date: Jun 28, 1991
• Grant date: Sep 15, 1992
• Expiry date: Jun 28, 2011

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M63/0001
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel injection pump for internal combustion engines comprising a pump housing, a distributor piston guided axially and rotatably, a rotating drive shaft supported in the pump housing, a transmission coupling the drive shaft to the distributor piston and a claw clutch and an eccentric disk rolling on a roller race with cams, and a lubricating oil circulation loop, which has a lubricating oil feed line discharging into a lubricating oil groove and a lubricating oil return line that returns from the transmission chamber which is partly filled with lubricating oil. To assure adequate supply of lubricating oil to the heavily loaded drive faces of the claw clutch, there is a flow lubricating oil through the drive shaft from the lubricating oil groove on into the claw clutch; via lubricating oil openings in at least those claw faces of the claw clutch that transmit a torque, the flow emerges into the transmission chamber.