Engine oil indicator

Details Engine oil indicator Engine oil indicator

1980-05-12

1981-12-22

Cox, Ronald B.

Internal-combustion engines

Lubricators

Crankcase, pressure control

73293, 123198D, F02M 100

Patent

active

043065252

ABSTRACT:
A single optical sensor coupled to an oil return line in an internal combustion engine is coupled to a control circuit for determining during a first time interval when the engine is started whether the crankcase oil level is sufficient and during a second time interval after the engine is running whether the oil needs to be changed.

REFERENCES:
patent: 1913436 (1933-06-01), Eckstein
patent: 4155013 (1979-05-01), Spiteri
patent: 4167172 (1979-09-01), Bassoli
patent: 4192186 (1980-03-01), Quinn

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