Method for inspecting a tank ventilation device, control device, and internal combustion engine

US8108127B2 · kind B2 · utility

Assignee

• CONTINENTAL AUTOMOTIVE GMBH · DE

Inventors

• Oliver Grunwald · Hockenheim, DE
• Oliver Prinz · Regensburg, DE

Key dates

• Filing date: Sep 5, 2007
• Grant date: Jan 31, 2012
• Expiry date: May 28, 2028

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M25/0809
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A robust method, an accordingly designed control device, and an internal combustion engine, enables the proper performance of a tank ventilation device during the operation of the internal combustion engine. For this purpose, the position of a pressure switch of the tank ventilation device is detected, which indicates the pressure present in the tank ventilation device, a controllable tank ventilation valve, which is disposed in a connecting line between a fuel vapor accumulator and an intake pipe of the internal combustion engine, is opened at least partially during the operation of the internal combustion engine, the position of the pressure switch is again detected after opening of the tank ventilation valve, the proper performance of the tank ventilation device; is analyzed based on a comparison of the position of the pressure switch before opening the tank ventilation valve to the position of the pressure switch after opening the tank ventilation valve.