Method for regenerating an activated carbon filter loaded with hydrocarbons

US6349707B1 · kind B1 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Klaus Neumann · Niederwerrn, DE
• Stefan Schneider · Aachen, DE

Key dates

• Filing date: Aug 31, 2000
• Grant date: Feb 26, 2002
• Expiry date: Aug 31, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02P5/045
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In order to regenerate an activated carbon filter which is seated in a tank vent line, during idling of the internal combustion engine the regeneration valve is brought into the maximum open position, and the throttle valve is simultaneously opened slightly. This produces a higher air mass flow in the intake tract of an internal combustion engine, and the proportion of hydrocarbons introduced by the regeneration remains constant. In order to keep the idling speed of the internal combustion engine constant, a torque reserve is built up, for example by adjusting the ignition angle.