Apparatus for automatically performing engine fluid changes

Details Apparatus for automatically performing engine fluid changes Apparatus for automatically performing engine fluid changes

1996-09-30

1997-11-11

Denion, Thomas E.

Lubrication

Automobile crank and gear case service

141 98, 123196R, F16C 314

Patent

active

056853963

ABSTRACT:
An environmentally sound apparatus for automatically extracting and injecting lubricating fluids is disclosed. The apparatus includes one or more sources of lubricating fluid, a waste fluid tank, and a source of compressed air, all with associated fluid-level sensing status switches, as well as other status switches for vacuum and low battery voltage. Signals from such status switches and from a fluid flow monitoring pulse meter are relayed to a central processing unit which operates through a front control panel to control a valved single pump and a plurality of valved lines in fluid communication with the single pump, and to display error messages to front control panel indicators when appropriate. Waste fluid is evacuated, from a crankcase oil pan of an internal combustion engine through one computer-determined arrangement of open valves and fluid lines, to the waste tank. Fresh fluid is injected, from one of the fluid sources through another computer-determined arrangement of open valves and fluid lines, to the oil pan. Quantities of both evacuated waste fluid and injected fresh fluid are at least periodically monitored and displayed. The system is also automatically cleared and purged of residual fluid. Evacuation, injection and clearing operations are initiated by an operator and executed automatically through status-monitored sequences controlled by the central processing unit. All fluid exchange sequences are performed without exposing the operator or the environment to either waste or fresh fluid.

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