Journal of Jilin University(Engineering and Technology Edition) ›› 2019, Vol. 49 ›› Issue (3): 798-804.doi: 10.13229/j.cnki.jdxbgxb20180484

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Investigation of integrated control strategy for stable operation of linear generator/engine system

Peng⁃fei ZANG1(),Zhe WANG1,Yang GAO2,Chen⁃le SUN1   

  1. 1. College of Automotive Studies, Tongji University, Shanghai 201804, China
    2. R&D Center, SAIC Motor Corporation Limited, Shanghai 201804, China
  • Received:2018-05-16 Online:2019-05-01 Published:2019-07-12

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Abstract:

To investigate the characteristics of Linear Generator/Engine System, the numerical simulation model of the system was set up. The accuracy of the simulation model was validated by a prototype. The disturbance during stable operation of the system was analyzed. under the extreme conditions of misfire, knocking and large variable load, an integrated control strategy was proposed based on mid?point velocity detection and trajectory tracking. The electromagnetic force control was applied during the whole stroke, and ignition control was applied around the top dead center. Results show that the system can return to stable operation within three strokes under this control after disturbance happens.

Key words: power machinery and engineering, linear generator/engine system, stable operation, trajectory tracking, mid?point velocity

CLC Number: 

  • TK441

Fig.1

Linear generator/engine system structure"

Fig.2

Linear generator/engine system force analysis"

Fig.3

Linear generator/engine system simulation model"

Fig.4

Linear generator/engine system prototype"

Table 1

Main specifications of system"

参 数数值
横截面面积/m20.002
余隙体积/mm35.7×10-6
排气口开启时活塞与对应缸盖的距离/mm4.6
活塞的有效冲程长度/mm54.8
扫气箱压力/Pa1.52×105
系统动子质量/kg3.75

Fig.5

Right piston displacement profile"

Fig.6

Right cylinder pressure profile"

Fig.7

Trajectory tracking control for stable operation"

Fig.8

Integrated control strategy for stable operation"

Fig.9

Trajectory at misfire working condition"

Fig.10

Electromagnetic force at misfire"

Fig.11

Displacement profile at misfire working condition"

Fig.12

Relationship between ignition in advance and midpoint velocity addition"

Fig.13

Trajectory at knock working condition"

Fig.14

Electromagnetic force at knock working condition"

Fig.15

Random fluctuation of injection"

Fig.16

Trajectory at random fluctuation of injection condition"

Fig.17

Piston displacement"

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