Arrangement for the stationary leak testing of tank venting systems
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United States of America Patent
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-
Apr 23, 1996
Grant Date -
N/A
app pub date -
Dec 19, 1994
filing date -
Jan 15, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In an arrangement for determining leaks in a tank venting system of a motor vehicle which includes a fuel tank, an adsorption filter in communication with the fuel tank, a venting pipe, a regeneration pipe connecting the adsorption filter to the intake manifold of an internal combustion engine, the venting pipe extends to an area adjacent the filler neck of the fuel tank and a test apparatus is provided with a test pipe having a seal sleeve for placement over the tank filler neck and the end of the venting pipe for applying pressure to the tank venting system by means of pumps disposed in the test apparatus and the test apparatus further includes a pressure sensor for determining the pressure in the tank venting system and a control device for controlling application of pressure to the venting system and for the evaluation of the pressure values determined by the pressure sensor for indicating a leak in the venting system.
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