Method and control apparatus for operating a tank ventilation system of an internal combustion engine

US11898507B2 · kind B2 · utility

Assignee

• VITESCO TECHNOLOGIES GMBH · DE

Inventors

• Hong Zhang · Schwieberdingen, DE
• Gerhard Haft · Munich, DE

Key dates

• Filing date: Feb 13, 2023
• Grant date: Feb 13, 2024
• Expiry date: Feb 13, 2043

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M25/089
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method for determining the load of a fuel vapor retention filter in a fuel evaporation retention system of an internal combustion engine. The fuel evaporation retention system includes: a fuel supply container for storing fuel, a connection line which couples the fuel supply container to the fuel vapor retention filter, a regeneration line which couples the fuel vapor retention filter to an intake tract of the internal combustion engine and in which an electrically controllable flow control valve is arranged, a ventilation line which couples the fuel vapor retention filter to the atmosphere, an electrically controllable purging air pump arranged in the regeneration line, such that purging air can be directed through the fuel vapor retention filter and supplied to the intake tract in order to regenerate the fuel vapor retention filter.