Method of checking the operational functionality of a tank venti

Details Method of checking the operational functionality of a tank venti Method of checking the operational functionality of a tank venti

1998-03-27

2000-07-04

McCall, Eric S.

Measuring and testing

Simulating operating condition

Marine

G01M 1500

Patent

active

060821892

ABSTRACT:
The tank venting system is evacuated by the negative pressure prevailing in the intake pipe of the internal combustion engine. A regression calculation, based on a physical model which simulates the pressure variation in the event of a leak in the tank venting system, on the basis of a gas mass flow flowing through an opening, supplies a parameter which describes the curve variation of the pressure during the test for gassing out fuel and during the diagnosis. The parameter contains the information about the leak area and takes into account external influences that interfere with the signal evaluation.

REFERENCES:
patent: 5572981 (1996-11-01), Pfleger et al.
patent: 5575265 (1996-11-01), Kurihara et al.

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