Cast light metal piston, in particular an aluminum piston
AssigneeMahle International GmbH
InventorsJochen Adelmann, Ralf Braig, Michael Marquardt
Life of this patent
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Abstract
A cast light metal piston for an internal combustion engine may include a piston crown and a piston skirt adjoining the piston crown. The piston skirt may include two skirt walls arranged on a pressure side and a counterpressure side, respectively. The piston skirt may have two box walls connecting the skirt walls, which conically taper towards one another in a direction of the piston crown. The piston may include an annularly encircling cooling channel. A thickness of the piston crown may amount to a maximum of 4.5 mm.
Claims20
A cast light metal piston for an internal combustion engine, comprising:
- a piston crown and a piston skirt adjoining the piston crown, the piston skirt including two skirt walls arranged on a pressure side and a counterpressure side, respectively, and two box walls connecting the skirt walls, which conically taper towards one another in a direction of the piston crown, and
- an annularly encircling cooling channel,
- wherein a thickness of the piston crown amounts to a maximum of 4.5 mm.
An internal combustion engine with at least one cast light metal piston, comprising:
- a piston crown adjoining a piston skirt, the piston skirt including two skirt walls arranged on a pressure side and a counterpressure side, respectively, and two box walls connecting the skirt walls, the box walls conically tapering towards one another in a direction of the piston crown;
- and
- an annularly encircling cooling channel arranged in the piston crown;
- wherein a thickness of the piston crown is 4.5 mm or less.
An internal combustion engine, comprising:
- at least one aluminum piston, the piston including a piston crown adjoining a piston skirt, the piston skirt including two skirt walls arranged on a pressure side and a counterpressure side, respectively, wherein the skirt wall arranged on the pressure side is shorter in a circumferential direction of the piston than the skirt wall arranged on the counterpressure side, wherein the skirt includes two box walls connecting the skirt walls, the box walls conically tapering towards one another in a direction of the piston crown, wherein the box walls taper towards one another in a direction of the skirt wall on the pressure side and converge in the direction of the skirt wall on the counterpressure side;
- an annularly encircling cooling channel disposed in the piston crown;
- and
- at least two spray nozzles for piston cooling, wherein one spray nozzle is directed at an inflow of the cooling channel and the other spray nozzle is directed to the piston crown;
- and
- wherein a thickness of the piston crown is 4.5 mm or less.
Dependencies are inferred from the claim text.