Apparatus for controlling an exhaust recirculation device in internal combustion engines

US4373496A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Max Greiner · Gerlingen, DE
• Klaus Krieger · Marbach am Neckar, DE
• Gottfried Schiller · Howell, US
• Wolf-Rudiger Walk · Stuttgart, DE
• Ludwig Walz · Stuttgart, DE

Key dates

• Filing date: Apr 1, 1981
• Grant date: Feb 15, 1983
• Expiry date: Apr 1, 2001

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M26/62
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An apparatus is proposed for controlling an exhaust recirculation device in internal combustion engines, in which a throttle device in an exhaust recirculation line is opened on the condition that the position of the load-adjusting lever of a fuel injection pump associated with the engine falls below a maximum load position and that the adjusting member of an rpm governor of the fuel injection pump is below a predetermined deflection position and/or is operated above a lower rpm value. With an embodiment of this kind, the control of exhaust recirculation quantities can be performed in a simple and functionally reliable manner for the various operational points of the engine with the greatest possible approximation of the permissible values.