Internal combustion engine
AssigneeLiebherr-Components Colmar SAS
InventorsBechir Mokdad, Yves-Antoine Rogard
Life of this patent
Estimating the term…
Abstract
The present invention provides an internal combustion engine comprising a crankshaft, the crankshaft comprising main bearing journals and cranks for connecting the crankshaft to piston rods of the engine, wherein the crankshaft is provided with counterweights, wherein at least a first counterweight is formed as a separate element and connected to the crankshaft. The present invention is characterized in that at least a second counterweight is formed integrally with the crankshaft.
Claims20
An internal combustion engine comprising:
- a crankshaft, the crankshaft comprising main bearing journals and cranks for connecting the crankshaft to piston rods of the engine,
- wherein the crankshaft is provided with counterweights, wherein at least a first counterweight is formed as a separate element and connected to the crankshaft,
- wherein at least a second counterweight is formed integrally with the crankshaft,
- wherein at least two counterweights having a different mass are provided, and
- wherein at least one counterweight has a mass that is between 1.5 and 20 times as large as the mass of another counterweight, and/or
- the mass of a two first counterweights each formed as separate elements differs by more than 1% and less than 20%, wherein the difference in mass is provided by material removal from a common basic counterweight type, and/or
- the mass of two second counterweights each formed integrally with the crankshaft differs by more than 1% and/or less than 25%, of the mass of the heavier of the two second counterweights.
An internal combustion engine, comprising at least 20 cylinders, arranged in a V-configuration, the internal combustion engine further comprising a crankshaft, the crankshaft comprising main bearing journals and cranks for connecting the crankshaft to piston rods of the engine,
- wherein the crankshaft is provided with counterweights,
- wherein at least two counterweights are provided on the crankshaft at different, non-zero angles with respect to a position opposite the crank pin of the corresponding crank.
A method for producing a crankshaft of a combustion engine, wherein at least two counterweights of the same basic type are formed as separate elements and connected to the crankshaft, comprising:
- in a first step, mass of at least one of the counterweights is reduced by a predetermined amount with respect to another counterweight of the same basic type by material removal, and
- in a second step, the unbalance of the crankshaft is measured and removed.
An internal combustion engine, comprising:
- a crankshaft, the crankshaft comprising main bearing journals and cranks for connecting the crankshaft to piston rods of the engine,
- wherein the crankshaft is provided with counterweights, wherein at least a first counterweight is formed as a separate element and connected to the crankshaft,
- wherein at least a second counterweight is formed integrally with the crankshaft, and
- wherein at least two first counterweights each formed as a separate element are connected to the crankshaft at different, non-zero angles with respect to a position opposite the crank pin of the corresponding crank, and/or wherein at least two second counterweights are formed integrally with the crankshaft at different, non-zero angles with respect to a position opposite the crank pin of the corresponding crank, and/or wherein a first counterweight formed as a separate element is connected to the crankshaft at a first, non-zero angle with respect to a position opposite the crank pin of the corresponding crank, and at least a second counterweight is formed integrally with the crankshaft at a second, non-zero angle with respect to a position opposite the crank pin of the corresponding crank, wherein the first and the second angle differ from each other.
Dependencies are inferred from the claim text.