Automatic crankcase oil change and makeup system

Details Automatic crankcase oil change and makeup system Automatic crankcase oil change and makeup system

1992-02-24

1995-02-21

Gluck, Richard E.

Lubrication

Automobile crank and gear case service

1841051, 123196S, F01M 1104

Patent

active

053907620

ABSTRACT:
Method and apparatus for automatically changing engine lubricating oil while the engine is running, in which small increments of used lubricating oil are periodically removed from the lubricating oil system, and substantially simultaneously with the removal of each increment of used oil, a corresponding increment of fresh oil is delivered to the lubricating oil system, so the volume of oil in the lubricating system is not reduced by the removal. Oil sump level sensing determines the destination of each used oil increment that is removed. If the sump level is not substantially below a predetermined satisfactory operating level when an increment of used oil is removed, the increment is delivered to the fuel tank for burnoff with the fuel for diesel engines, or to a holding tank for other engines, in a normal oil change mode of operation. If, however, the sump level is substantially below the predetermined level, then the increment is delivered back to the lubricating oil system in an oil makeup mode of operation. Actuation and timing of the apparatus are microprocessor or otherwise electronically controlled. The apparatus may include multiple probes for sensing the sump level at various spaced apart locations which are in fluid communication with the sump. The probes generate a plurality of signals indicative of the oil levels at such locations, and such signals can be used to develop an average signal representative of the sump level for all orientations of the engine. A variety of probe types and locations, and probe sensors are described.

REFERENCES:
patent: 4012012 (1977-03-01), Ligler
patent: 4417561 (1983-11-01), Yasuhara
patent: 4674456 (1987-06-01), Merritt

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