Piston ring for combustion engine
AssigneeRiken
InventorsKazunori Natabe, Naoya Honjou
Life of this patent
Estimating the term…
Abstract
Provided is a piston ring for an internal combustion engine that enables size reduction of a chamfered edge without leading to the chipping, and sufficient size reduction of a flow passage of a blow-by gas in a piston ring gap, thus effectively restraining the blow-by gas from passing through the piston ring gap. A piston ring 1 with a piston ring gap 2 used for an internal combustion engine includes a chamfered edge 3 continuous to at least one of piston ring end faces at the piston ring gap 2 and an outer peripheral surface 1a of the piston ring 1. The chamfered edge 3 has a curved shape.
Claims14
A piston ring with a piston ring gap used for an internal combustion engine, the piston ring comprising:
- a chamfered edge continuous to at least one of piston ring end faces at the piston ring gap and an outer peripheral surface of the piston ring,
- wherein the chamfered edge has a curved shape,
- the chamfered edge includes a first arcuate surface, a second arcuate surface formed between the first arcuate surface and the outer peripheral surface of the piston ring, and a third arcuate surface formed between the first arcuate surface and the piston ring end face, and
- a ratio R3/R1 of a radius R3 of the third arcuate surface to a radius R1 of the first arcuate surface is 0.050 to 0.500.
A piston ring with a piston ring gap used for an internal combustion engine, the piston ring comprising:
- a chamfered edge continuous to at least one of piston ring end faces at the piston ring gap and an outer peripheral surface of the piston ring,
- wherein the chamfered edge has a curved shape,
- the chamfered edge includes a first arcuate surface, a second arcuate surface formed between the first arcuate surface and the outer peripheral surface of the piston ring, and a third arcuate surface formed between the first arcuate surface and the piston ring end face, and
- a ratio R2/R1 of a radius R2 of the second arcuate surface to the radius R1 of the first arcuate surface is 0.1 to 0.8.
Dependencies are inferred from the claim text.