Appeal No. 1999-0530 Page 2
Application No. 08/722,682
slight overpressure occurs. More specifically, the pressure
in the tank at the start of the tanking operation increases
significantly and drops again to its original level after the
tanking operation.
Such a characteristic pressure trace is used to detect
tanking operations via pressure measurement in the tank and
especially during the check of operability of a tank-venting
system with a diagnostic system. The measurement of the
pressure trace during a tanking operation is made within an
interval. This avoids the situation that, for an open tank
cap in which tanking has not yet started, a fault is announced
by the diagnostic system. Also, a conclusion can be reliably
drawn as to a tanking operation based on the time-dependent
development of the characteristic pressure trace.
Claim 1, which is representative for our purposes,
follows:
1. A method for detecting a filling or tanking
operation on a receptacle having a receptacle cover,
the filling or tanking operation including: opening
the receptacle, introducing a fill nozzle, tanking,
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Last modified: November 3, 2007