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On-line Access: 2022-05-10

Received: 2021-12-31

Revision Accepted: 2022-03-03

Crosschecked: 2022-05-11

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Liang LU


Meng-ru LI


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Journal of Zhejiang University SCIENCE A 2022 Vol.23 No.4 P.314-328


Analysis of fretting wear behavior of unloading valve of gasoline direct injection high-pressure pump

Author(s):  Liang LU, Yin-peng XU, Meng-ru LI, Qi-long XUE, Man-yi ZHANG, Liang-liang LIU, Zhong-yu WU

Affiliation(s):  School of Mechanical Engineering, Tongji University, Shanghai 201804, China; more

Corresponding email(s):   limengru@tongji.edu.cn

Key Words:  Fretting wear behavior, Unloading valve, Experimental and numerical analyses, High pressure

Liang LU, Yin-peng XU, Meng-ru LI, Qi-long XUE, Man-yi ZHANG, Liang-liang LIU, Zhong-yu WU. Analysis of fretting wear behavior of unloading valve of gasoline direct injection high-pressure pump[J]. Journal of Zhejiang University Science A, 2022, 23(4): 314-328.

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author="Liang LU, Yin-peng XU, Meng-ru LI, Qi-long XUE, Man-yi ZHANG, Liang-liang LIU, Zhong-yu WU",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Analysis of fretting wear behavior of unloading valve of gasoline direct injection high-pressure pump
%A Liang LU
%A Yin-peng XU
%A Meng-ru LI
%A Qi-long XUE
%A Man-yi ZHANG
%A Liang-liang LIU
%A Zhong-yu WU
%J Journal of Zhejiang University SCIENCE A
%V 23
%N 4
%P 314-328
%@ 1673-565X
%D 2022
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2100685

T1 - Analysis of fretting wear behavior of unloading valve of gasoline direct injection high-pressure pump
A1 - Liang LU
A1 - Yin-peng XU
A1 - Meng-ru LI
A1 - Qi-long XUE
A1 - Man-yi ZHANG
A1 - Liang-liang LIU
A1 - Zhong-yu WU
J0 - Journal of Zhejiang University Science A
VL - 23
IS - 4
SP - 314
EP - 328
%@ 1673-565X
Y1 - 2022
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2100685

The high pressures in gasoline direct injection technology lead to structural damage in some hydraulic components, especially annular damage on the contact area of the valve ball and on the valve seat of the spherical unloading valve in the high-pressure pump. In previous study, the authors have analyzed the damage on the unloading valve and demonstrated that it is caused neither by static damage nor fatigue damage and have put forward the hypothesis of fretting wear. This paper is based on the establishment of the statically indeterminate structure of the unloading valve. The micro friction parameters (stress, friction coefficient, etc.) required for the numerical iterative calculation of fretting wear are calculated. In addition, based on the grid adaptive technology and a modified Archard wear model, the fretting wear is calculated quantitatively and is in good agreement with experimental results. Based on that verification, the wear laws of the valve ball and valve seat under the same hardness, different contact angles, and different assembly stresses, are analyzed in detail, and reasoned suggestions for the structural design and assembly design of the ball valve are given.




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