The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 26, 2021
Filed:
Apr. 27, 2018
Bayerische Motoren Werke Aktiengesellschaft, Munich, DE;
Emmanuel Arras, Munich, DE;
Markus Huber, Munich, DE;
Bayerische Motoren Werke Aktiengesellschaft, Munich, DE;
Abstract
A method for testing the tightness of a fuel supply system of a motor vehicle is provided. The fuel supply system includes a volume-changing element provided in the fuel tank, the volume of which volume-changing element is in contact with the environment. The fuel tank is customarily sealed off against the environment by way of a valve unit. For testing the tightness, a differential pressure with respect to environment is generated in the tank by way of a gas conveying device, sequentially and thus not simultaneously, the volume-changing element being sealed off against the environment, and the volume-changing element not being sealed off against the environment, a differential pressure with respect to environmental pressure is generated in the volume-changing element or in the tank. The differential pressures are maintained and monitored over a certain period of time, and if after this period of time, the differential pressures still exceed a certain threshold value, a sufficient tightness of the fuel supply system is concluded.