Adsorption filter for the fuel tank venting system of an internal combustion engine and process for operating said system

US5983870A · kind A · utility

Assignee

• Knecht Filterwerke GmbH · DE

Inventors

• Matthias Bohl · Waiblingen, DE
• Harald Haufe · Stuttgart, DE
• Klaus Schweikert · Löwenstein, DE
• Kay Brodesser · Rutesheim, DE
• Uwe Mohr · Stuttgart, DE

Key dates

• Filing date: Oct 30, 1998
• Grant date: Nov 16, 1999
• Expiry date: Oct 30, 2018

Classification

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

Abstract

A process and device are provided to supply the air mass flux required to regenerate the adsorption material of an adsorption filter in the fuel tank venting system of an internal combustion engine while the engine is running and independently of a depression in the air intake pipe of the engine. For this purpose, atmospheric air is fed at least partially and temporarily by an air pump through the adsorption filter to the air intake pipe of the internal combustion engine while the engine is running. The air pump integrated in the device makes it possible to obtain a module which is easy to produce and to handle and which contains all units of the venting system.