Simulation of the Gas Exchange Process in a Small Two-stroke Cycle Engine : 2nd Report Comparison between Experimental and Theoretical Treatments

概要

論文の詳細を見る
This paper deals with a widely applicable simulation of the gas exchange process in a small two-stroke cycle gasoline engine. Theoretical result shown by the 1st report was compared with the experimental data obtained from pressure and gas analysis under various cylinder port heights and engine speeds. In this simulation, the diffusion factor ε_m in the scavenging passage, the mixing factor r in the scavenging passage or the crank case, and the mixing factor ψ_m and the short-circuit factor ψ_d in a cylinder, are taken as follows : For the exhaust lead of 0.026〜0.184 and the engine speed of 1000〜5000 rpm, 0 ≨ ε_m ≨ 0.08,0r ≨ 0.35 (in the case of return-blow), 0 ≨ r ≨ 0.06 (in the case of blow-back), 0.7 ≨ ψ_m ≨ 1,0 ≨ ψ_d ≨ 0.1. The optimum values of the scavenging efficiency and the charging efficiency are obtained at the exhaust lead of 0.096 and engine speed of 2800 rpm, ε_m=0. 01,r=0. 01 (in the case of return- blow), r=0 (in the case of blow-back), ψ_m= 0.85,ψ_d=0.
一般社団法人日本機械学会の論文