Apparatus for deciding engine-oil replacing time for an automobi

Details Apparatus for deciding engine-oil replacing time for an automobi Apparatus for deciding engine-oil replacing time for an automobi

1990-09-21

1991-08-27

Ng, Jin F.

Communications: electrical

Land vehicle alarms or indicators

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

340438, B60Q 100

Patent

active

050436970

ABSTRACT:
An apparatus for deciding engine-oil replacing time for an automobile. The apparatus comprises a pulse input unit into which is inputted a pulse generated during the rotation of the engine of an automobile to calculate rotational frequency of the engine on the basis of the pulse, a rotational-frequency integration unit for receiving a signal of rotational frequency of the engine output from the pulse input unit to integrate the rotational frequency of the engine, and a display unit into which is input an integrated value from the rotational-frequency integration unit and in which a degree of oil degradation on the basis of the integrated value is displayed by a display such as a LED, a liquid crystal, a 7-segment or the like.

REFERENCES:
patent: 3603880 (1971-09-01), Brecker, Jr.
patent: 4501005 (1985-02-01), Miller
patent: 4551703 (1985-11-01), Bourauel et al.
patent: 4580127 (1986-04-01), Blowers
patent: 4677847 (1987-07-01), Sawatari et al.
patent: 4742476 (1988-05-01), Schwartz et al.

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