Apparatus for warning of engine oil abnormality

Details Apparatus for warning of engine oil abnormality Apparatus for warning of engine oil abnormality

1990-06-25

1991-10-01

Crosland, Donnie L.

Communications: electrical

Land vehicle alarms or indicators

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

340459, B60Q 100

Patent

active

050537458

ABSTRACT:
An apparatus is disclosed for warning of the abnormality of an engine including a magneto generating an a.c. voltage and an ignition coil which includes a first signal generation section for generating a first signal including an electric quantity corresponding to the insulation resistance of lubricating oil, a temperature detecting section for producing temperature signal, a reference signal generation section for generating a reference signal in response to the temperature signal, an oil-shortage judging section for comparing the first signal and the reference signal to determine that the engine has a shortage of oil when the first signal is larger than the reference signal and generating a shortage signal, a control section for performing a short-circuit of a primary side of the ignition coil to produce a short-circuit current in response to the shortage signal and an oil-shortage display section for displaying the warning of the shortage of oil in response to the short-circuit current.

REFERENCES:
patent: 4074672 (1978-02-01), LaDue et al.
patent: 4518956 (1985-05-01), Kitagawa et al.
patent: 4622935 (1986-11-01), Janisch
patent: 4720997 (1988-01-01), Doak et al.
patent: 4845469 (1989-07-01), Benda
patent: 4933852 (1990-06-01), Lemelson

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