Study on the sensitivity of the hydraulic response characteristics of the electronic fuel injector regarding the key structural parameters

Yaonan Feng,Jie Wang,Fukang Ma,Chunlong Xu,Zengquan Wang,Tiexiong Su

doi:10.1177/1687814018822590

Abstract

The sensitivity of key structural parameters to the hydraulic response characteristics in an electronic fuel injector is investigated. First, the hydraulic response characteristic is defined in detail (the opening/closing delay and the opening/closing time). Second, the key structural parameters influencing the hydraulic response characteristics are derived. Finally, the importance and effects of key structural parameters on hydraulic response characteristics are examined, by using the design of experiments method and the range analysis. Results show that the fuel inlet passage diameter is the primary influencing factor to the opening delay and closing delay, while the control piston diameter has the dominant effect on opening time and closing time. A small opening delay and a small opening time prefer a little fuel inlet passage diameter and control piston diameter; however, they contribute to a large closing time and closing delay. The fuel outlet passage diameter is the secondary influencing factor in opening delay, but the second factor that affects the opening time is the diameter of needle.

Highlights

With the depletion of fossil fuels and the growing environmental problem, diesel engines’ performance and emissions attract more and more attentions
The above research focuses on the sensitivity of the hydraulic response characteristics of the electric control injector to the key structural parameters
The key structural parameters are obtained according to the control equation of the electric control injector

Summary

Introduction

With the depletion of fossil fuels and the growing environmental problem, diesel engines’ performance and emissions attract more and more attentions. Keywords Electronic fuel injector, structural parameters, hydraulic response characteristics, sensitivity Few studies have mentioned the relationship between structural parameters and hydraulic response characteristics of electronic fuel injector in the literature.

Results

Conclusion