Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1993-08-16
1995-09-19
Swarthout, Brent
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
220 862, 220DIG33, 340438, B60Q 100
Patent
active
054519276
ABSTRACT:
An automotive fuel filler pipe cap detection system has a filler pipe cap retainer on the end of the filler pipe for retaining the filler pipe cap, a passage through the cap retainer with a line outlet leading to a vacuum line connected to a manifold, and a seal outlet leading to the underside of the fuel cap when it is in place. Vacuum is generated in the vacuum line when the engine is started with the cap covering the seal outlet. A two position pressure switch connected to the vacuum line is in a first position when vacuum is sensed in the vacuum line and a second position when vacuum pressure is not sensed. A "fuel cap missing" indicator is lit to warn the operator when the switch is in the second position.
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patent: 4877146 (1989-10-01), Harris
Ford Motor Company
Kelley David B.
May Roger L.
Swarthout Brent
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