Study of the Injection Control Strategies of a Compression Ignition Free Piston Engine Linear Generator in a One-Stroke Starting Process

Huihua Feng, Yuyao Guo, Yu Song, Chendong Guo and Zhengxing Zuo
Additional contact information
Huihua Feng: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Yuyao Guo: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Yu Song: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Chendong Guo: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Zhengxing Zuo: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China

Energies, 2016, vol. 9, issue 6, 1-19

Abstract: For a compression ignition (CI) free piston engine linear generator (FPLG), injection timing is one of the most important parameters that affect its performance, especially for the one-stroke starting operation mode. In this paper, two injection control strategies are proposed using piston position and velocity signals. It was found experimentally that the injection timing’s influence on the compression ratio, the peak in-cylinder gas pressure and the indicated work (IW) is different from that of traditional reciprocating CI engines. The maximum IW of the ignition starting cylinder, say left cylinder (LC) and the right cylinder (RC) are 132.7 J and 138.1 J, respectively. The thermal-dynamic model for simulating the working processes of the FPLG are built and verified by experimental results. The numerical simulation results show that the running instability and imbalance between LC and RC are the obvious characters when adopting the injection strategy of the velocity feedback. These could be solved by setting different triggering velocity thresholds for the two cylinders. The IW output from the FPLG under this strategy is higher than that of adopting the position feedback strategy, and the maximum IW of the RC could reach 162.3 J. Under this strategy, the prototype is able to achieve better starting conditions and could operate continuously for dozens of cycles.

Keywords: free piston engine; linear motor; injection control strategies (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

Downloads: (external link)
https://www.mdpi.com/1996-1073/9/6/453/pdf (application/pdf)
https://www.mdpi.com/1996-1073/9/6/453/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:9:y:2016:i:6:p:453-:d:71924

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().