초록 ▼

An internal combustion engine is provided with a cartridge containing a fuel/oil mixture where the fuel is liquid, normally gaseous fuel. The cartridges can be readily mounted or demounted from the engine, and provide flexibility of use coupled with easy starting. The use of the fuel/oil cartridges

An internal combustion engine is provided with a cartridge containing a fuel/oil mixture where the fuel is liquid, normally gaseous fuel. The cartridges can be readily mounted or demounted from the engine, and provide flexibility of use coupled with easy starting. The use of the fuel/oil cartridges eliminates the need to separately mix oil and fuel, and eliminates substantial contact of the user with an oily fuel/oil mixture. The two cycle and four cycle cartridge-type engines are suitable for use in many hand-powered implements, including line trimmers, chain saws, leaf blowers, hedge trimmers, etc.

대표청구항 ▼

A two-cycle engine assembly of the type having a crankcase through which combustible air/fuel/oil mixture flows prior to introduction into a combustion chamber of the engine, the two-cycle engine assembly comprising: a crankcase assembly having a crankcase housing forming an enclosed crankcase chamb

A two-cycle engine assembly of the type having a crankcase through which combustible air/fuel/oil mixture flows prior to introduction into a combustion chamber of the engine, the two-cycle engine assembly comprising: a crankcase assembly having a crankcase housing forming an enclosed crankcase chamber, the crankcase housing surrounding a crankshaft pivotally mounted thereto; a piston and connecting rod; a cylinder assembly affixed to the crankcase housing and having a cylinder wall and enclosed end to define a combustion chamber in cooperation with the piston, the piston sealingly cooperating with the cylinder wall and reciprocally movable thereby by the connecting rod which pivotally attaches the piston to the crankshaft causing the piston to reciprocate as the crankshaft rotates, the cylinder assembly having an inlet extending through the cylinder wall to introduce the air/fuel/oil mixture into the crankcase chamber and a transfer passageway connecting the crankcase chamber to the combustion chamber to allow air/fuel/oil mixture to be displaced from the crankcase chamber to the combustion chamber, the cylinder assembly further provided with an exhaust port extending through the cylinder wall to facilitate the removal of post-combustion exhaust gases; a connector having an inlet for receiving a pressurized cartridge containing the mixture of liquid normally gaseous fuel and oil, and an outlet for the fuel/oil mixture; a pressure regulator cooperating with the connector outlet for providing the fuel/oil mixture at a controlled pressure; a carburetor coupled to the inlet of the cylinder assembly for mixing the fuel/oil mixture supplied by the pressure regulator with air at a predetermined ratio throughout a range of flow conditions associated with normal engine operation; wherein the air/fuel/oil mixture lubricates necessary portions of the two cycle engine assembly prior to introduction into the combustion chamber of the engine.