Internal-combustion engines – Two-cycle – Rear compression
Patent
1998-10-02
2000-06-27
Argenbright, Tony M.
Internal-combustion engines
Two-cycle
Rear compression
123 1A, 123196R, F01M 100
Patent
active
060793805
ABSTRACT:
An electronically controlled lube oil and fuel blending system is provided which controls the amount of lube oil delivered from an engine lube oil supply system to an engine fuel supply system based on the amount of fuel added to the fuel supply system thereby maintaining a constant lube oil/fuel ratio or lube oil concentration in the fuel supply system 16 regardless of variations in engine operation thereby minimizing emissions, such as particulate matter. The system includes a lube oil injection circuit connecting the engine lube oil supply system to the fuel supply system and an emission compliance lube oil concentration control system for controlling a lube oil concentration in the fuel supply system to maintain compliant engine emissions during engine operation. Emission compliance lube oil concentration control system includes a lube oil injection control device for controllably delivering a predetermined quantity of used lube oil from the engine sump to the fuel supply system and a fuel supply sensing device for sensing the amount of fuel added to a fuel tank during a fuel supply period. Fuel supply sensing device 32 may include a flow meter positioned in supply pipe or a level sensing device for sensing the change in the fuel level in the tank during the supply period. The system may also include a makeup lube oil supply system for supplying additional, i.e. fresh, lube oil to engine lube oil supply system to maintain the quantity and quality of the lube oil in the engine.
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Butler Steven R.
Daugherty Hugh M.
Jorgensen Robert A.
Argenbright Tony M.
Brackett Jr. Tim L.
Cummins Engine Company, Inc.
Hairston Brian
Leedom Jr. Charles M.
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