Throttle device for an internal combustion engine

US5615861A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Herbert Pollmann · Eisenerz, AT
• Wolfgang Hodulik · Eisenerz, AT
• Klaus-Jurgen Peters · Marbach am Neckar, DE
• Karl Gmelin · Flein, DE
• Matthias Entenmann · Bietigheim-Bissingen, DE
• Peter Ropertz · Oberriexingen, DE

Key dates

• Filing date: Jun 6, 1995
• Grant date: Apr 1, 1997
• Expiry date: Jun 6, 2015

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05C2201/021
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A throttle device having a throttle-flap connection piece which is produced from plastic. For an efficient production of the throttle-flap connection piece form plastic in the plastic injection-molding technique, it is necessary to avoid undesirable shrinkage in the pivoting region of the throttle flap and to seal off the bearing arrangements against penetrating plastic during the injection operation. The throttle device includes an annular insertion part which is arranged in the pivoting region of the throttle flap and which, connected to the bearing arrangements is embedded into the throttle-flap connection piece made form plastic, in order to protect the bearing arrangement against penetrating plastic. The injected-round insertion part is suitable for throttle devices which are made from plastic and which are provided for mixture-compressing spark-ignition or air-compressing auto-ignition internal-combustion engines.