Injection device for combined injection of fuel and supplementary fluid or liquid

US5762033A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Helmut Rembold · Stuttgart, DE
• Walter Teegen · Waiblingen, DE

Key dates

• Filing date: Jun 25, 1997
• Grant date: Jun 9, 1998
• Expiry date: Jun 25, 2017

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02B3/06
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An injection device for a combined injection of a fuel and a supplementary liquid, into the combustion chamber of an internal combustion engine. In this device, the fuel is injected by means of an injection valve controlled by an electromagnetic valve, and the injection valve additionally has a connection to a supplementary liquid pressure source that is provided with an intermittent-supply piston driven by a controlled pressure medium. For the pressure medium, pressure is drawn from a pressure reservoir; the pressure is supplied by a high-pressure feed pump provided for creating high pressure for fuel to be injected.