Method of checking the operability of a tank-venting system

Details Method of checking the operability of a tank-venting system Method of checking the operability of a tank-venting system

1999-07-21

2000-08-22

Miller, Carl S.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123198D, F02M 3302

Patent

active

061055573

ABSTRACT:
The invention is directed to a method for checking the operability of a tank-venting system. The tank-venting system includes a tank, an adsorption filter having a tank-venting line, a connecting line for connecting the adsorption filter to the tank, a tank-venting valve and a valve line connecting the adsorption filter to the tank-venting valve. A pressure source is provided for introducing a pressure into the tank-venting system, an operating characteristic variable of the pressure source is detected only over a pregiven time interval (.DELTA.t.sub.m) when introducing the pressure to obtain a time-dependent trace of the operating characteristic variable. The time-dependent trace is extrapolated and a conclusion is drawn as to the presence of a leak therefrom.

REFERENCES:
patent: 5273020 (1993-12-01), Hayami
patent: 5349935 (1994-09-01), Mezger
patent: 5383438 (1995-01-01), Blumenstock
patent: 5460141 (1995-10-01), Denz
patent: 5483942 (1996-01-01), Perry
patent: 5499614 (1996-03-01), Bosato
patent: 5553577 (1996-09-01), Denz
patent: 5685279 (1997-11-01), Blomquist
patent: 5794599 (1998-08-01), Blumenstock
patent: 5890474 (1999-04-01), Schnaibel et al.

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