Missing fuel cap detection system

Details Missing fuel cap detection system Missing fuel cap detection system

2006-02-28

2006-02-28

La, Anh V. (Department: 2636)

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

C340S451000, C073S049700, C073S118040

Reexamination Certificate

active

07005975

ABSTRACT:
A method for detecting a missing or improperly installed fuel cap on a vehicle includes a first leak test that detects a leak in an evaporative emissions system of a vehicle. A refueling test detects a refueling of the vehicle when the first leak test detects the leak. A fuel cap indicator in the vehicle is activated when the first leak test detects the leak and the refueling test detects the refueling. The fuel cap indicator is deactivated after a predetermined time period. The fuel cap indicator remains deactivated when a predetermined number of leak tests consecutively detect the leak. The fuel cap indicator is deactivated when an occupant of the vehicle indicates that a fuel cap of the vehicle is properly installed. The occupant activates an actuator on an instrument panel of the vehicle to indicate the fuel cap is properly installed.

REFERENCES:
patent: 5451927 (1995-09-01), Thompson
patent: 6202478 (2001-03-01), Blomquist et al.
patent: 6208245 (2001-03-01), Post et al.
patent: 6285934 (2001-09-01), Shaw

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