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US 2026/0309104 A1Published application
Piston and internal combustion engine
AssigneeMahle International GmbH
InventorPetru Berghian
Life of this patent
Estimating the term…
Abstract
A piston, for an internal combustion engine, includes a ring groove. The piston further includes a lower compression ring, an oil control ring, and a tensioning device. The lower compression ring, the oil control ring, and the tensioning device are arranged in the ring groove. The tensioning device prestresses the oil control ring against a first groove wall and the lower compression ring away from the first groove wall.
Claims23
A piston for an internal combustion engine, the piston comprising:
- a ring groove that axially widens in a radially outward direction;
- a lower compression ring;
- an oil control ring;
- and
- a tensioner;
- wherein the lower compression ring, the oil control ring, and the tensioner are arranged in the ring groove;
- and
- wherein the tensioner prestresses the oil control ring against a first groove wall and the lower compression ring away from the first groove wall.
5 more elements
An internal combustion engine, comprising:
- a piston including:
- a piston body including a ring groove that axially widens in a radially outward direction;
- a lower compression ring;
- an oil control ring;
- and
- tensioner;
- wherein the lower compression ring, the oil control ring, and the tensioner are arranged in the ring groove;
- and
- wherein the tensioner prestresses the oil control ring against a first groove wall and the lower compression ring away from the first groove wall.
6 more elements
(canceled)
-13. (canceled)
-20. (canceled)
A piston for an internal combustion engine, comprising:
- a piston body including:
- a first groove wall;
- a second groove wall;
- a radially outward facing groove base wall extending from the first groove wall to the second groove wall;
- a ring groove defined by the first groove wall, the second groove wall, and the groove base wall;
- and
- a recess disposed in the groove base wall and projecting radially into the piston body;
- a lower compression ring arranged in the ring groove and projecting radially into the recess;
- an upper compression ring arranged in the ring groove axially between the lower compression ring and the second groove wall of the piston body;
- an oil control ring arranged in the ring groove adjacent to the first groove wall;
- and
- a tensioner arranged in the ring groove axially between the lower compression ring and the oil control ring, the tensioner pressing the oil control ring toward the first groove wall and pressing the lower compression ring toward the second groove wall;
- wherein the upper compression ring is radially aligned with a portion of the groove base wall that adjoins the second groove wall.
10 more elements
Dependencies are inferred from the claim text.