System for setting the throttle flap angle for an internal combustion engine

US5046467A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Herbert Arnold · Eberdingen, DE
• Michael Horbelt · Schwieberdingen, DE
• Rudiger Jautelat · Tamm, DE
• Peter Werner · Wiernsheim, DE
• Manfred Mezger · Markgröningen, DE
• Gunther Plapp · Echterdingen, DE

Key dates

• Filing date: Dec 19, 1989
• Grant date: Sep 10, 1991
• Expiry date: Dec 19, 2009

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2250/16
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention is directed to a system for setting the throttle flap angle for an internal combustion engine. The system sets the idle stop for the idle throttle flap angle and monitors the setting with respect to defects that occur. If the throttle flap is in contact engagement with the idle stop, a contact is actuated which causes a buffer storage of the actual throttle flap angle which thereby represents the position of the idle stop. If then, for example, the idle stop changes during driving operation, its new position is established upon a renewed contact engagement of the throttle flap, by measuring the throttle flap angle. A possible defect can be established from a comparison of actual and desired values and a positioning motor is then appropriately driven to displace the idle stop. This system has the advantage that a defect occurring in the region of the positioning motor is detected without additional circuit complexity.