Measuring and testing – With fluid pressure – Leakage
Patent
1994-03-28
1996-04-16
Williams, Hezron E.
Measuring and testing
With fluid pressure
Leakage
73 497, G01M 332
Patent
active
055071767
ABSTRACT:
An evaporative emissions test apparatus is provided including a tester adapted to pressure test a vehicle fuel holding system for vapor emitting leaks. The test apparatus includes an adapter configured to sealingly engage the access port for filling the fuel tank, the adapter being further configured to sealingly receive the vehicle fuel cap so that the vehicle fuel holding system including the fuel cap can be tested as a unit. The tester includes a connector for connecting to the adapter, and further includes a second connector for connecting to a pressure source for pressurizing the fuel holding system and fuel vapor control system to a predetermined pressure. The tester also includes a sensor for sensing the pressure over time, a timer for indicating the passage of a predetermined amount of time, and a display generator and display for indicating if the pressure in the atmosphere is acceptable after passage of the predetermined amount of time.
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Exhibit E is a publication entitled "OBD-II Evaporative System Monitor", published by B. Schwager of Ford Motor Company, dated Sep. 29, 1993, which discloses a method of testing a fuel tank including pressurizing the fuel tank system to 10 inches water with nitrogen, which is a non-combustible gas.
Exhibit A discloses an "all manual" fuel tank assembly leak tester made by or for K-Line Industries, the assignee of the present patent application, which has been used by Ford Motor Company for more than one year to pressure test fuel tank assemblies for fuel leaks. The leak tester includes two styles of special filler caps configures to interface a fuel tank filler neck and sealingly cover same, a pressure regulator, a pressure gage, hoses and connectors for connecting the hoses, and aluminum plugs to seal off all fuel vapor hoses and fuel lines.
Exhibit B discloses a photograph of the fuel tank assembly leak tester disclosed in Exhibit A.
Exhibit C discloses another "all manual" fuel tank assembly leak tester made by or for K-Line Industries, the assignee of the present patent application, which tester was manufactured for Volkswagen Company over one year ago to pressure test fuel tank assemblies for fuel leaks. The leak tester components are listed on the disclosure.
Exhibit D discloses a photograph of the fuel tank assembly leak tester disclosed in Exhibit C.
Chirco Peter R.
Kammeraad David A.
K-Line Industries, Inc.
Lankin Daniel S.
Williams Hezron E.
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