TITLE:
Effects of Injection Timing on Operating Performance of Aero Two-Stroke Piston Engine
AUTHORS:
Liwen Zhu, Liang Liu, Kaifeng Cao, Yifei Wu, Jinwu Wu, Xueyun Gao, Chengyu Han
KEYWORDS:
Spark-Ignition Aviation Two-Stroke Gasoline Engine, Fuel Injection Timing, Combustion, Mixture Formation, Numerical Simulation
JOURNAL NAME:
World Journal of Engineering and Technology,
Vol.14 No.2,
May
27,
2026
ABSTRACT: According to the relevant technical parameters of the spark-ignition aviation two-stroke gasoline engine, a one-dimensional simulation model of the whole engine was established on the GT-Power software platform. The initial and boundary conditions required for three-dimensional simulation were obtained through the one-dimensional model. On this basis, three-dimensional numerical simulation of the studied aviation two-stroke engine was carried out using Converge software, and the effects of different injection timings on the in-cylinder mixture formation and combustion process were analyzed. The results indicate that a reasonable injection timing can achieve superior in-cylinder mixture uniformity, thereby optimizing the combustion performance of the engine. Overly early injection leads to excessive fuel being directly discharged from the cylinder, while overly late injection results in insufficient uniformity of the in-cylinder mixture, both of which deteriorate the combustion effect. When the engine operates at 5400 r/min, the optimal fuel injection timing is ?130?CA.