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1. (WO2017148741) TEST METHODOLOGY TO REDUCE FALSE REJECTIONS AND INCREASE NUMBER OF CONTAINERS TESTED FOR TIGHTNESS

Pub. No.:    WO/2017/148741    International Application No.:    PCT/EP2017/053895
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Wed Feb 22 00:59:59 CET 2017
IPC: G01M 3/32
F02D 41/38
F02D 41/22
Applicants: ROBERT BOSCH GMBH
Inventors: CASARI, John
Title: TEST METHODOLOGY TO REDUCE FALSE REJECTIONS AND INCREASE NUMBER OF CONTAINERS TESTED FOR TIGHTNESS
Abstract:
A method and system of testing a tightness of a closed container using a two-part test. The first part of the two-part test includes connecting the closed container to a gas supply and filing the closed container with a testing gas from the gas supply. A first leak rate of the closed container is measured over a first period of time, and when the first leak rate is less than a first threshold, the controller identifies the closed container as compliant. Conversely, when the first leak rate is greater than the first threshold, the controller measures a second leak rate of the closed container over a second period of time. When the second leak rate is greater than a second threshold, the controller identifies the closed container as noncompliant, and when the second leak rate is less than the second threshold, the controller identifies the closed container as compliant.