V2403 C2.4 Diesel Used Engine Blocks For Excavator E307 Water
Cooling
Specification
| Car name: Engine cylinder block |
| Model Number: V2403T |
| Cylinder stroke: 87 |
| Cylinder diameter: 102 |
| Application: Excavator |
| valve: 8 valve |
| Cooling: Water cooling |
| Injection: Eddy |
| Work form: Turbo |
Description
Cylinder Block Design
Alloys commonly used for engine block include the alloys EN
AC-46200 (AlSi8Cu3) and EN AC45000 (AlSi6Cu4) which are similar to
the American standard alloys A380.2 and A319, respectively. These
hypoeutectic Al-Si alloys are generally produced from recycled
aluminium and are mostly applied for engine blocks produced with
gravity casting processes.
The relatively high Cu content enables them to retain their
strength at elevated temperatures and makes them easily machinable.
The as-cast (F) condition and the T4 and T5 heat treatments are
commonly used.
Almost all high pressure die cast engine blocks are produced with
the very common secondary alloy EN AC-46000 (AlSi9Cu3(Fe)). Except
for a moderate annealing for the reduction of residual stresses, no
further heat treatment can be applied in general.
Engine blocks cast from the alloys EN AC-42100 (AlSi7Mg0.3) and EN
AC-42000 (AlSi7Mg) achieve very high strength and elongation values
at room temperature when a T6 heat treatment is applied. Attention
has to be paid to residual stresses resulting from quenching during
T6 treatment. The higher resistance to cracking in the plastic
regime offered by these alloys enables them to survive the much
harsher thermal fatigue loading conditions encountered in this
application.
There is some sacrifice in machinability (mainly burring) and added
cost in heat treatment since a T6 or T7 temper is usually required.
Due to limited contents of impurity elements such as Fe, Mn, Cu,
and Ni, there is also an additional cost compared to the secondary
alloys mentioned above.
Blocks from hypereutectic AlSi alloys (AlSi17Cu4Mg) are usually
produced with low pressure die casting and are subsequently T6
treated. Also this alloy is generally more expensive compared to
the standard secondary foundry alloys.
Applicable casting processes
For the production of engine blocks, a multitude of casting
technologies are applied. From an economic aspect, for mass
produced engines, highly automated casting methods using sand
moulds (“core package processes”), where the cycle time is not
limited by the solidification conditions, are competing with die
casting methods where the cycle time is limited.
