Research on the Effect of the Outlet Throttle Diameter Deviation on the Pressure Relief Rate of the Injector Control Valve

Rina Ren (), Tiexiong Su, Fukang Ma, Wei Yang, Xin Zhao and Chunlong Xu
Additional contact information
Rina Ren: School of Mechanical Engineering, North University of China, Taiyuan 030051, China
Tiexiong Su: School of Mechanical Engineering, North University of China, Taiyuan 030051, China
Fukang Ma: School of Energy & Power Engineering, North University of China, Taiyuan 030051, China
Wei Yang: School of Energy & Power Engineering, North University of China, Taiyuan 030051, China
Xin Zhao: School of Mechanical and Electrical Engineering, Shanxi Datong University, Datong 037009, China
Chunlong Xu: China Northern Engine Research Institute, Tianjin 300400, China

Energies, 2022, vol. 16, issue 1, 1-19

Abstract: Common rail injector response characteristics depend on the control chamber pressure change rate, the outlet throttle diameter by manufacturing errors, or wear-induced deviations that affect the rate of pressure change in the control chamber, so the accuracy of the outlet throttle diameter directly affects the control valve response consistency. This paper presents a computational fluid dynamics (CFD) simulation of the effect of the deviation of the outlet throttle diameter on the average mass flow rate of the outlet throttle during the opening of the spherical valve in order to reduce this difference and ensure uniform injection characteristics. The results illustrate that with the increase in outlet throttle diameter deviation, the volume of gas phase in the control valve increases and the rate of pressure reduction in the control chamber accelerates, and the sensitivity coefficient of the average mass flow rate of the outlet throttle to the outlet throttle diameter deviation remains unchanged at 24.77. Cavitation occurs in the area of the outlet throttle when the spherical valve lift is 0.045 mm. The increase in rail pressure not only leads to an increase in the low-pressure area on the inner wall of the outlet throttle, an increase in the volume share of the gas phase, and an increase in the hydraulic impact on the sealing wall but also makes the average mass flow rate of the outlet throttle and the rate of change of the control chamber pressure during the opening of the spherical valve more sensitive to the deviation of the outlet throttle diameter.

Keywords: injector control valve; outlet throttle diameter deviation; pressure relief rate; response characteristics; sensitivity analysis; rail pressure (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: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/16/1/50/pdf (application/pdf)
https://www.mdpi.com/1996-1073/16/1/50/ (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:16:y:2022:i:1:p:50-:d:1009805

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 ().