Patent ID: 6568507
Filing Date: 2003-05-27
Classification: F01M

Abstract:
A system for removing liquid from an engine, said system comprising:a first conduit adapted for insertion into an engine reservoir that contains liquid to be removed; a first liquid storage tank for receiving liquid from said first conduit; a second liquid storage tank adapted to receive liquid from said first liquid storage tank via a second conduit, said second liquid storage tank being vertically below said first liquid storage tank; a first control valve disposed in said second conduit between said first and second liquid storage tanks, said first control valve being operable to control fluid communication between said first and second liquid storage tanks; a vacuum source for establishing sub-atmospheric pressure in said first and second liquid storage tanks; a pressurized air source that selectively communicates pressurized air to said second liquid storage tank; a return tank that receives liquid from said second liquid storage tank; a second control valve for controlling communication between said vacuum source and said second liquid storage tank; sensors for sensing liquid levels in said first and second liquid storage tanks; and, a controller for actuating said first and second control valves, and for controlling communication of pressurized air to said second liquid storage tank, in response to said sensed liquid levels.