Breather for an internal combustion engine fuel tank

US5450833A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Helmut Denz · Stuttgart, DE
• Hans Neu · Leinfelden, DE
• Guenther Riehl · Bühl, DE
• Andreas Blumenstock · Ludwigsburg, DE
• Rainer Frank · Sachsenheim, DE

Key dates

• Filing date: Aug 6, 1993
• Grant date: Sep 19, 1995
• Expiry date: Aug 6, 2013

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M25/0854
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A breather valve for a gas tank of an internal combustion engine having an adsorption filter which is linked to the atmosphere by a breather line which is controlled by a shut-off valve. As air flows through the shut off valve, contaminations entrained in the shut off valve may deposit in the shut-off valve, so that it will no longer close tightly. For this reason, a particle filter has been arranged in front of the shut-off valve. The particle filter is of a large surface area which is integrated in the housing of the adsorption filter, thus contamination of the shut-off valve (51) and an excessive pressure drop of the air flowing through the particle filter (41) is avoided. The integrated construction facilitates a simple assembly of the adsorption filter (41) which is suitable for internal combustion engines in motor vehicles.