Apparatus and method for diagnosing leaks of fuel vapor treatmen

Details Apparatus and method for diagnosing leaks of fuel vapor treatmen Apparatus and method for diagnosing leaks of fuel vapor treatmen

1999-03-16

2000-12-19

Williams, Hezron

Measuring and testing

With fluid pressure

Leakage

73 497, 73 405R, 731181, 123520, F02M 3302, F02M 3704, G01M 332, G01M 1500

Patent

active

061614238

ABSTRACT:
A leak diagnosis apparatus and method for a fuel vapor treatment unit where fuel vapor produced in a fuel tank is collected by adsorbing into an adsorption canister and the fuel vapor collected in the adsorption canister is purged under predetermined engine operating conditions and supplied to an engine. The diagnosis apparatus includes a leak diagnosis device unit for diagnosing the presence of fuel vapor leaks by comparing a drive load of an electric pump for when air is pumped by the electric pump into a system of fuel piping to be leak diagnosed with a set judgement level of drive load threshold. A fuel temperature detection device is provided for detecting the temperature of fuel, wherein a fuel vapor leak is deemed to exist when the comparisons show that the drive load of the electric pump is less than the set judgement level. A judgement level setting device is provided for setting the judgment level based on the detected temperature.

REFERENCES:
patent: 5408866 (1995-04-01), Kawamura et al.
patent: 5467641 (1995-11-01), Williams et al.
patent: 5606121 (1997-02-01), Blomquist et al.
patent: 5726354 (1998-03-01), Nomura et al.
patent: 5739421 (1998-04-01), Iochi et al.
patent: 5750888 (1998-05-01), Matsumoto et al.
patent: 5767395 (1998-06-01), Goto et al.
patent: 5786531 (1998-07-01), Lewis et al.
patent: 5817925 (1998-10-01), Cook et al.
patent: 5898108 (1999-04-01), Mieczkowski et al.
patent: 5941927 (1999-08-01), Pfitz

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