Patent ID: 6213173
Filing Date: 2001-04-10
Classification: F01M

Abstract:
An apparatus for changing oil in an internal combustion engine having an internal oil lubrication distribution passage system with an oil filter , a crankcase and an oil reservoir, the apparatus comprising:means for purging fluid from said oil filter into said oil reservoir;means for removing fluid from said oil reservoir;means for monitoring the pressure in the crankcase and preventing overpressurization of the crankcase when purging fluid from said oil filter into said oil reservoir; andmeans for introducing fluid into said oil reservoir through said oil filter and internal oil lubrication distribution passage system, wherein said fluid purging means includes a source of compressed air, fluid passage means interconnecting the source of compressed air with said internal oil lubrication distribution passage system at a position upstream of said oil filter, valve means for controlling communication of the source of compressed air with said internal oil lubricating distribution passage system, means for activating and deactivating the valve means for controlling communication of the source of compressed air, and means for sensing when to deactivate the valve means.