Trouble diagnostics apparatus for fuel treatment system

Details Trouble diagnostics apparatus for fuel treatment system Trouble diagnostics apparatus for fuel treatment system

2006-05-02

2006-05-02

McCall, Eric S. (Department: 2855)

Measuring and testing

With fluid pressure

Leakage

C073S118040

Reexamination Certificate

active

07036354

ABSTRACT:
A pump module30is provided for introducing a negative pressure t a fuel tank10. A tank's internal pressure at a time, upon which a steady-state pressure reaching time elapses after introduction of the negative pressure is started, is detected as a convergence value. It is determined whether or not there is a leak in a system including the fuel tank based on that convergence value. A space volume inside the fuel tank10is detected by an output produced by a fuel level gauge12. The steady-state pressure reaching time is set based on the space volume.

REFERENCES:
patent: 6374663 (2002-04-01), Muller et al.
patent: 2002/0100314 (2002-08-01), Docy et al.
patent: 2003/0015022 (2003-01-01), Stegmann et al.
patent: 2004/0261506 (2004-12-01), Amlin
patent: A 06-235355 (1994-08-01), None
patent: A 2002-004959 (2002-01-01), None

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