Method and arrangement for checking the tightness of a vessel

Details Method and arrangement for checking the tightness of a vessel Method and arrangement for checking the tightness of a vessel

2005-01-11

2005-01-11

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

C123S184550, C123S516000

Reexamination Certificate

active

06840234

ABSTRACT:
In order to reduce the influence of the elasticity of components of a vessel (10, 20, 30, 40, 50) and/or of an outgassing of a liquid fluid (11), which is disposed in the vessel (10, 20, 30, 40, 50) or a condensation of a gas disposed in the vessel or of a gas mixture (12) on an underpressure or an overpressure in the vessel, a gas mass flow is controlled to obtain a constant underpressure or overpressure in the vessel. In this way, a leak of the vessel can be detected with great reliability and the size of the leak can be computed with great accuracy. The vessel is especially a vessel of a tank system and tank-venting system of a motor vehicle having an internal combustion engine. In the event that a gas mass flow adjusts, which is constant in average, and which is greater than a pregivable limit value, a conclusion is drawn as to the presence of a leak. The size of the leak is computed from a signal characterizing the constant gas mass flow.

REFERENCES:
patent: 5285745 (1994-02-01), Husain
patent: 5460143 (1995-10-01), Narita
patent: 5850819 (1998-12-01), Kunimitsu et al.
patent: 6220230 (2001-04-01), Kawamura et al.
patent: 6394074 (2002-05-01), Okada et al.
patent: 6460518 (2002-10-01), Streib

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