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US 5,261,358 AGranted
Internal combustion engine
AssigneeAardvark Pty Ltd.
InventorDavid J. Rorke
Life of this patent
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AssigneeAardvark Pty Ltd.
InventorDavid J. Rorke
Estimating the term…
An internal combustion engine comprises a cylinder of stepped configuration having a working portion and a pumping portion and a piston of stepped configuration having a working portion and a pumping portion, the working and pumping portions respectively co-operating to define a combustion chamber and a pumping chamber each of which varies in volume upon reciprocation of the piston in the cylinder. Air is admitted to the pumping chamber through a duct from where, on volume reduction thereof, if passes via a plurality of passages and a one-way valve into a transfer chamber. On volume expansion of the combustion chamber, air in chamber is discharged therefrom via a plurality of passages, common discharge port and valve to scavenge the combustion chamber and provide combustion air. The valve may be self-acting or operated by a crankshaft controlled push-rod. A delivery pump operated pneumatically under the influence of the pumping chamber to deliver fuel or a combustible mixture to inlet passage is also disclosed.
An internal combustion engine comprising a cylinder and a piston mounted for reciprocation in the cylinder, the piston and the cylinder co-operating to define a combustion chamber and a pumping chamber each of which varies in volume upon reciprocation of the piston in the cylinder, an inlet means to admit atmospheric air into the pumping chamber, a transfer chamber defined within the piston for receiving and containing atmospheric air from the pumping chamber, a control means for controlling discharge of the atmospheric air from the transfer chamber into the combustion chamber and means independent of said transfer chamber for transferring a rich fuel air mixture into the combustion chamber.
Dependencies are inferred from the claim text.