Discharge system for introducing volatilized fuel into an internal combustion engine

US4763635A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Lutz Ballhause · Waiblingen, DE
• Siegfried Fehrenbach · Markgröningen, DE
• Kurt Herbst · Burgstetten, DE
• Erwin Krimmer · Plüderhausen, DE
• Wolfgang Schulz · Wunstorf, DE

Key dates

• Filing date: Feb 12, 1986
• Grant date: Aug 16, 1988
• Expiry date: Feb 12, 2006

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M2025/0845
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A discharge system is proposed which serves to introduce volatilized fuel into an intake tube of an internal combustion engine. The discharge system includes a discharge regulation valve, which on one side is located at an outlet line of an absorber element that emits volatilized fuel and on the other side is located at an outflow line which leads to the intake tube downstream of a throttle device. The discharge regulation valve includes a bottom portion and a cover between which one end of a leaf spring is firmly fastened. The other end of the leaf spring is loosely guided in a gap between the bottom portion and the cover. An armature is joined to the leaf spring and a valve closing body is secured to the armature remote from the leaf spring. A core is secured on a magnet housing disposed in the bottom portion and has a through conduit, which at one end terminates at a valve seat. An electromagnetic coil is disposed in the magnet housing and is triggerable in a clocked manner by an electronic control unit in accordance with engine operating characteristics. The spacing between the valve seat and the valve closing body adjusts automatically in accordance with the pressure differenc…