Research on matching modeling and load characteristics of linear range extender system

doi:10.3969/j.issn.1674-8484.2025.01.010

Abstract

Abstract:

The linear extended range system is a new type of efficient, high power density energy conversion system which is directly coupled with free piston engines and a linear motor. In order to reasonably match the system electromagnetic load and improve the system operation stability, the stable operation load limit of the system under the corresponding design parameters was investigated, and the system operation characteristics under different electromagnetic loads were determined. The system thermodynamics coupling simulation model was established using MATLAB/Simulink to determine the system load limit range. The changes in system operating characteristics and performance characteristics as the load changes within the load limit range were obtained. The results show that when the load increases from 392 to 538 N/(m·s^-1), the system operating frequency is reduced from 39.6 to 30.6 Hz, the operating compression ratio is reduced from 15.0 to 6.0, the indicated thermal efficiency is reduced from 41.4% to 31.1%, the system output power is reduced from 9.2 to 5.3 kW, and the indicated fuel consumption rate is increased from 197.6 to 263.0 g/kWh.

Key words: engine control, linear range extender, hybrid power, multi-fuel adaptable engine, load characteristics

CLC Number:

TK412.1

ZHANG Zhiyuan, WEI Shuojian, MA Yuguo, FENG Huihua, JIA Boru, SHUAI Shijin, HE Hongwen. Research on matching modeling and load characteristics of linear range extender system[J]. Journal of Automotive Safety and Energy, 2025, 16(1): 97-106.

Figures/Tables 15

References 20

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发动机类型	二冲程汽油机
燃油喷射方式	进气道喷射
缸径	52.5 mm
冲程	64 mm
设计压缩比	8.5
动子组件质量	5.0 kg
进气压力	0.11 MPa
过量空气系数	1.0

发动机类型	二冲程汽油机
燃油喷射方式	进气道喷射
缸径	52.5 mm
冲程	64 mm
设计压缩比	8.5
动子组件质量	5.0 kg
进气压力	0.11 MPa
过量空气系数	1.0

进气压力	0.11 MPa
过量空气系数	1.0
点火位置	20 mm
油泵压力	0.3 MPa
电磁负荷系数	510 N / (m·s^-1)

进气压力	0.11 MPa
过量空气系数	1.0
点火位置	20 mm
油泵压力	0.3 MPa
电磁负荷系数	510 N / (m·s^-1)