Back to results
US 5,605,126 AGranted
Piston for internal combustion engines, especially diesel engines
AssigneeAlcan Deutschland GmbH
InventorsLothar Hofmann, Rudolf Schwarz, Andreas Deuber, Karl-Heinz Obermeier-Wagner
Life of this patent
Estimating the term…
Abstract
A piston for diesel engines is made of a toughness-increasing aluminium alloy containing copper, nickel, silicon, magnesium, iron and manganese. The use of this material, which can conventionally be chill-cast, and by implying special dimensions, provides a piston which, despite its relatively light construction, provides the utmost security against cracking in the stressed regions, e.g. the piston boss or the combustion chamber recess.
Claims8
A piston for internal combustion engines, especially diesel engines, including
- a piston diameter D,
- a compression height KH,
- a combustion chamber recess (10) with a diameter MN and a depth MT,
- a pin bore (14) with a diameter B,
- a radially inner spacing AA of the piston pin bosses above the piston pin axis,
- a piston pin length SA,
- a length SL of the piston body beneath the lowermost piston ring groove (12),
- a body wall thickness WDDS(X) on the thrust side in the connecting rod pivoting plane X,
- a body wall thickness WDGDS(X) on the counter-pressure side in the connecting rod pivoting plane X,
- the body wall thicknesses WDDS(X) and WDGDS(X) continuously decreasing in an angular area .alpha. between the connecting rod pivoting plane X and the piston pin plane Y from Y in the direction of X, and
- the mentioned dimensions lying within the following ranges:
- KH=(0.48 to 0.63).times.D
- MT=(0.16 to 0.35).times.D
- MN=(0.40 to 0.62).times.D
- B=(0.29 to 0.41)=D
- AA=(0.24 to 0.43).times.D
- SA=(0.70 to 0.86).times.D
- SL=(0.25 to 0.45).times.D
- WDDS (X)=(0.030 to 0.065).times.D
- WDGDS (X)=(0.023 to 0.047).times.D, and
- the body wall thicknesses in the angular area .alpha. decreasing from the piston pin plane Y in the direction of the connecting rod pivoting plane X according to the following dimension rules:
- from (0.09 to 0.06).times.D to (0.065 to 0.030).times.D on the thrust side, and
- from (0.09 to 0.06).times.D to (0.047 to 0.023).times.D on the counter-thrust side.
20 more elements
Dependencies are inferred from the claim text.