不等長圧縮膨張機関による熱効率改善の可能性 : 第2報数値解析(予混合圧縮着火燃焼と新燃焼(1),予混合圧縮着火燃焼と新燃焼)

概要

論文の詳細を見る
A test engine which has longer expansion stroke than compression stroke and enables a slow piston-movement during combustion period was built. The experimental data indicated an increase in degree of constant volume, but did not show an increase in thermal efficiency. In order to clarify this reason, numerical simulations are conducted in this paper. As a result, the gain due to the increase in degree of constant volume caused by piston-motion during combustion was found not exceeding the loss by increased heat loss. Numerical analysis deduced that increasing the piston-movement near TDC rather achieves an improvement of thermal efficiency in case that a rapid combustion was realized.
社団法人日本機械学会の論文
2004-09-04