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US 8,281,755 B2Granted
Internal combustion engine with provision for lubricating pistons
AssigneeAchates Power, Inc.
InventorsJames U. Lemke, William B. McHargue
Life of this patent
Estimating the term…
Abstract
An internal combustion engine including a cylinder with bore and a piston disposed to reciprocate in the bore is operated by moving the piston in the bore between top and bottom dead center positions and applying lubricant to a portion of the piston that protrudes from the bore. Lubricant is wiped from the piston as the piston travels into the bore toward its top dead center position.
Claims16
An assembly for a diesel engine, comprising:
- a cylinder with a bore, exhaust and inlet ports, and first and second ends;
- first and second opposed pistons disposed to reciprocate in the bore;
- each piston including a skirt and a crown and lacking an internal wristpin;
- a dispenser for each piston, each dispenser extending axially into a respective piston for applying lubricant to the inner surface of the piston's skirt;
- and,
- a first ring located outboard of the exhaust port to contact and wipe the skirt of the first piston, and a second ring located outboard of the inlet port to contact and wipe the skirt of the second piston.
3 more elements
An internal combustion engine, comprising:
- a cylinder including a bore, exhaust and inlet ports, and first and second ends;
- first and second opposed pistons disposed to reciprocate in the bore;
- a pair of side-mounted crankshafts;
- rods connecting the pistons to the crankshafts;
- a first ring located in the bore between the first end of the cylinder and the exhaust port to contact and wipe lubricant from the first piston, and a second ring located in the bore between the second end of the cylinder and the inlet port to contact and wipe lubricant from the second piston;
- and,
- a first dispenser extending axially into the skirt of the first piston for applying lubricant to the inner surface of the skirt of the first piston, and a second dispenser extending axially into the skirt of the second piston for applying lubricant to the inner surface of the skirt of the second piston.
4 more elements
Dependencies are inferred from the claim text.