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research-article

THE INVESTIGATION OF GEOMETRIC PARAMETERS ON THE INJECTION CHARACTERISTIC OF THE HIGH PRESSURE COMMON-RAIL INJECTOR

[+] Author and Article Information
Ling Wang

School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
14125904@bjtu.edu.cn

Guoxiu Li

School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
li_guoxiu@yahoo.com

Chun Long Xu

China North Engine Research Institute, Tianjin 300400, China
1368716033@qq.com

Xing Xi

China North Engine Research Institute, Tianjin 300400, China
10223078@bjtu.edu.cn

Xiao Jun Wu

China North Engine Research Institute, Tianjin 300400, China
15201325562@139.com

Shu Ping Sun

China North Engine Research Institute, Tianjin 300400, China
3156320932@qq.com

1Corresponding author.

ASME doi:10.1115/1.4041134 History: Received April 14, 2016; Revised June 29, 2018

Abstract

According the actual structure and working principle of a fuel injector to build a model of the common-rail injector, including the control valve, the solenoid valve, and the needle valve of the injector. The model includes the leakage model for the control piston and needle valve that takes into account increasing leakage at high pressure. The performance of the fuel injector is investigated using a one-dimensional numerical model. Analyzing the effect of the system and structure parameters including common-rail pressure, injection pulse width, inlet and outlet hole diameter, and the injection nozzle on the injection characteristics of the fuel injector. Results show that the geometric parameter is the main property affecting the flow characteristic of the injector, which includes the flow rate of inlet and outlet hole, pressure waves in the control chamber and injection rate. The common-rail pressure, injection pulse width and the geometric parameters mainly affect the injection performance, such as the injection rate and injected volume. The investigation result can provide some useful information to improve the injection characteristic in follow-up studies.

Copyright (c) 2018 by ASME
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