Abstract: An environmentally sound apparatus and method for automatically extracting fluids such as lubricating fluids from a target reservoir such as a crankcase for a vehicle engine, and injecting the proper type and quantity of fresh fluid into the reservoir is disclosed. The apparatus includes one or more sources of lubricating fluid, a waste fluid tank, a pump, and a flow meter. A programmed microprocessor produces selected sequences of control signals to govern the flow of fluid among the fluid sources, the waste fluid tank, and the target reservoir in response to input identification information and signals produced by a flow monitoring pulse meter. Input identification information is compared with data in a stored database to determine the correct type and quantity of fresh fluid to inject. Operator identification information is compared with a stored operator database to determine what operations each operator is permitted to perform.

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.

Abstract: An environmentally sound apparatus and method 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.