Device for controlling at least one throttle cross-section at a control opening

US4962737A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Gunter Brand
• Hartmut Brammer · Leinfelden, DE
• Richard Gerber · Stuttgart, DE
• Otto Glockler · Renningen, DE
• Gerold Grimm · Leonberg, DE
• Hans-Ulrich Gruber · Gerlingen, DE
• Dieter Gunther · Steinheim an der Murr, DE
• Jorg Issler · Stuttgart, DE
• Harald Kalippke
• Wolfgang Lolhoffel · Ditzingen, DE
• Helmut Maurer · Rodenbach, DE
• Ulrich Mayer · Weißenhorn, DE
• Gunther Plapp · Echterdingen, DE
• Erhard Renninger · Markgröningen, DE
• Claus Ruppmann · Stuttgart, DE
• Harald Sailer · Markgröningen, DE
• Peter Werner · Wiernsheim, DE

Key dates

• Filing date: Nov 1, 1989
• Grant date: Oct 16, 1990
• Expiry date: Nov 1, 2009

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 a throttle cross-section of at least one control orifice in a bypass line extending around a throttle valve of an air intake pipe of an internal combustion engine, for regulating an idle speed of the internal combustion engine, and comprising a throttle member, a spring element for biasing the throttle member to an initial position thereof, and a positioning motor for moving the throttle member from its initial position against a bias force of the spring element, upon failure of the spring element and when the positioning motor is actuated, to establish a safety cross-section in the bypass line, a quantity of operating medium flowing through the safety cross-section being less than a quantity of operating medium flowing through a complete cross-section of the control orifice whereby idle operation of the internal combustion engine is insured.