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Effect of Injection Pressure, Injection Duration, and Injection Frequency on Direct Injector’s Mass Flow Rate for Compressed Natural Gas Fuel

Mohamad Hafizul Rahman, Alias and Mohd Fadzil, Abdul Rahim and Muhamad Haziq, Mohd Ismail Rodzi and Rosli, Abu Bakar (2018) Effect of Injection Pressure, Injection Duration, and Injection Frequency on Direct Injector’s Mass Flow Rate for Compressed Natural Gas Fuel. In: MATEC Web of Conferences: UTP-UMP-VIT Symposium on Energy Systems 2018 (SES 2018), 18-19 September 2018 , Universiti Malaysia Pahang. pp. 1-6., 225 (02008). ISSN 2261-236X

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Abstract

A conventional gasoline direct injector is converted for gaseous fuel application. The conversion alters the injector characteristic which further affect the mixture formation and combustion processes. The purpose of this study is to investigate the effects of injection pressure (case 1), injection duration (case 2), and injection frequency (case 3) on the injector’s mass flow rate. An injector was independently tested by using an injector test bench. In Case 1, the injection pressure was tested from 20 bar to 60 bar at 24 ms of injection duration for 1000 injection counts. In Case 2, the injection duration was set from 2 to 24 ms at a constant 50 bar injection pressure for different engine speed. Whereas in Case 3, the averaged mass flow rate are plotted at different injection frequency. Theoretical calculations were carried out to compare the experimental and theoretical result. The experiment results shown that the injection pressure affected the injector mass flow rate linearly. At short injection duration, the mass flow rate inconsistent and highly fluctuated. At higher injection frequency, the mass flow rate is becoming higher. The theoretical results able to predict the mass flow rate trend but were unable to spot the fluctuating effects.

Item Type: Conference or Workshop Item (Lecture)
Uncontrolled Keywords: Injection Pressure, Injection Duration, Injection Frequency, Compressed Natural Gas Fuel
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Faculty/Division: Faculty of Mechanical and Automotive Engineering Technology
Institute of Postgraduate Studies
Depositing User: Mr. Mohd Fadzil Abdul Rahim
Date Deposited: 09 Sep 2021 07:58
Last Modified: 09 Sep 2021 07:58
URI: http://umpir.ump.edu.my/id/eprint/29101
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