The combustion chamber geometry of diesel engine has a
direct influence on the atomization and combustion of in-cylinder
fuel. In order to meet the increasingly stringent emission regulations, a
diesel engine was taken as the study object. The geometry of prototype ω-shaped combustion chamber was modified using AVL FIRE software under
the premise of maintaining the same compression ratio. The annular convex
structure and the center cam structure were introduced to construct the TCD
combustion chamber. For TCD, the letter "T" stands for turbocharger,
the letter "C" stands for charger air cooling, and the letter
"D" stands for diesel particle filter. The structural parameters of
TCD combustion chamber were then optimized. The effects of combustion chambers
with different geometries on the performance and emissions of diesel engine were
investigated using simulation. The results show that the performance of TCD
combustion chamber is significantly influenced by the diameter of combustion
chamber. Diameter that is either too large or too small will reduce the
indicated power. The optimized TCD combustion chamber exhibits 0.98% increase
in indicated power compared to that before optimization and 8.26% increase
compared to the prototype ω-shaped combustion chamber.
Furthermore, the soot emissions reduce by 67.19% compared to that before
optimization and by 88.37% compared to the prototype ωshaped
combustion chamber.
WANG Dongge, HE Chao, LI Jiaqiang, CHEN Yanlin, NIE Yan, YU Haisheng
. Effect of Structural Optimization of TCD Combustion
Chamber on Engine Performance[J]. Vehicle Engine, 2025
, 0(2)
: 29
.
DOI: 10.3969/j.issn.1001-2222.2025.02.005
