Device for controlling the idling speed of an internal combustion engine

US5564388A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Johannes Meiwes · Markgröningen, DE
• Albert Gerhard · Tamm, DE
• Uwe Hammer · Hemmingen, DE

Key dates

• Filing date: Jun 7, 1995
• Grant date: Oct 15, 1996
• Expiry date: Jun 7, 2015

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M2003/067
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A device for controlling the idling speed of an internal combustion engine by controlling a quantity of operating medium which can be fed to the internal combustion engine from an operating medium source via at least two flow lines. A first valve operating area is controlled at a first valve opening by a first valve closing element, and a second valve opening area is controlled at a second valve opening by a second valve closing element. The first and the second valve closing elements can be adjusted by an actuator in such a way that the first valve opening and the second valve opening are arranged in series one behind the other between the operating medium source and the intake port of the internal combustion engine. The valve closing elements are coupled to one another in such a way that when they are actuated the first valve closing element always firstly clears a flow area at the first valve opening (34) and only then does the second valve closing element clear a flow area at the second valve opening (36).