Low oil sensor for an internal combustion engine

Details Low oil sensor for an internal combustion engine Low oil sensor for an internal combustion engine

1987-02-12

1988-07-05

Cross, E. Rollins

Internal-combustion engines

Lubricators

Crankcase, pressure control

123198DC, 73290R, 340618, 184108, F01M 100

Patent

active

047547324

ABSTRACT:
A low oil sensor especially for application with an internal combustion engine is provided with an over-center spring and diaphragm structure to maintain the sensor in the inactivated mode whenever there is an adequate oil level in an engine sump. Crankcase pulse pressures provide an adequate pressure differential across the diaphragm to move the switch to activate an indicator circuit and to stop the engine. Inadvertent switch operation is prevented by utilization of a check valve and bleed port arrangement. The switch can be reset by an externally operable reset plunger.

REFERENCES:
patent: 3022497 (1962-02-01), Tyner
patent: 3333259 (1967-07-01), Carothers, Jr.
patent: 3366100 (1968-01-01), Sapp
patent: 3577121 (1971-05-01), Wing et al.
patent: 3593267 (1971-07-01), Klein
patent: 3964079 (1976-06-01), Katagiri et al.
patent: 4065760 (1977-12-01), Feldon
patent: 4203408 (1980-05-01), Yamaguchi et al.
patent: 4204203 (1980-05-01), Verne
patent: 4480610 (1984-11-01), Stinson
patent: 4583085 (1986-04-01), Beller
patent: 4622935 (1986-11-01), Janisch
Honda's Oil Alert System.

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