Oil-changing system for an internal combustion engine

Patent · Tue Jun 23 04:00:00 EDT 1987

OSTI ID:6378709

Merritt, T K

A method is described for maintaining the quality of lubricating oil in an internal combustion engine having an oil reservoir comprising periodically removing used oil from the reservoir in an amount no greater than 20% of the total capacity of the reservoir, and simultaneously adding a substantially equal volume of fresh oil. The rate of removals and additions are substantially equal to the engine manufacturer's recommended rate of complete oil change based upon engine usage factors. The removing and adding of oil is effected at opposite extremities of the reservoir and accomplished by electrically operated pumps capable of generating a significant output pressure while preventing backflow. The operation of the pumps is dictated by monitoring means which record the extent of oil usage. The removed used oil is transferred to a container having an exit drain.

• Assignee: NOV-87-068603; EDB-87-132478
• Patent Number(s): US 4674456
• OSTI ID: 6378709
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CAPACITY
CONTROL
DRAINAGE
ELECTRICAL EQUIPMENT
ENGINES
EQUIPMENT
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
LUBRICANTS
LUBRICATING OILS
MONITORING
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PRESSURE CONTROL
PUMPING
PUMPS
QUALITY CONTROL
REMOVAL
WASTE OILS