Tank leakage diagnosis having a fuel tank as a pressure store

US9983090B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Peter Klee · Knittlingen, DE
• Andreas Posselt · Rochlitz, DE
• Marko Lorenz · Bornsteiner Straße, DE
• Andreas Gutscher · Markgröningen, DE
• Roland Kurz · Linden, DE
• Thomas Wieczorek · Meckesheim, DE
• Thomas Herges · Eberdingen, DE
• Joerg Koenig · Stuttgart, DE
• Florian Guenther · Freiberg, DE
• Johannes Hoegl · Stuttgart, DE

Key dates

• Filing date: Sep 25, 2014
• Grant date: May 29, 2018
• Expiry date: Feb 7, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a system (1) and to a corresponding method for tank leakage diagnosis. The system (1) comprises a fuel tank (3), a pressure source (5, 9), and a pressure sensor (7). The pressure source (5, 9) is configured to increase the pressure in the fuel tank (3). The pressure sensor (7) is configured to detect the pressure progression at the fuel tank (3). The system (1) is configured to seal the fuel tank (3) in a gas-tight manner such that the fuel tank (3) can be used as a pressure store. Furthermore, the system (1) is configured to conclude, independently of a current operation of the pressure source (5, 9) based on the determined pressure progression at the fuel tank (3), that a leak is present.