Research on transmission and coupling characteristics of multi-frequency pressure fluctuation of high pressure common rail fuel system

Fuel ◽  
2021 ◽  
pp. 122632
Author(s):  
Yunpeng Wei ◽  
Liyun Fan ◽  
Yuelin Wu ◽  
Yuanqi Gu ◽  
Jing Xu ◽  
...  
Keyword(s):  
High Pressure ◽  
Pressure Fluctuation ◽  
Common Rail ◽  
Fuel System ◽  
Coupling Characteristics ◽  
High Pressure Common Rail

scholarly journals Impact of a Diesel High Pressure Common Rail Fuel System and Onboard Vehicle Storage on B20 Biodiesel Blend Stability

2016 ◽  
Vol 9 (1) ◽  
pp. 203-214 ◽  
Author(s):  
Earl Christensen ◽  
Robert L. McCormick ◽  
Jenny Sigelko ◽  
Stuart Johnson ◽  
Stefan Zickmann ◽  
...  
Keyword(s):  
High Pressure ◽  
Common Rail ◽  
Fuel System ◽  
Biodiesel Blend ◽  
High Pressure Common Rail

scholarly journals Experiment investigation of injection parameters effects on injection stability of a high pressure common rail system

2021 ◽  
Vol 104 (1) ◽  
pp. 003685042098362
Author(s):  
Ziguang Gao ◽  
Guoxiu Li ◽  
Hongmeng Li ◽  
Chunlong Xu ◽  
Yanhong Kang
Keyword(s):  
High Pressure ◽  
Pressure Fluctuation ◽  
Injection Pressure ◽  
Injection Rate ◽  
Common Rail ◽  
Common Rail System ◽  
Stability Parameters ◽  
Rail System ◽  
The Stability ◽  
High Pressure Common Rail

High pressure common rail system can precisely control the injection time and injection pressure to improve the thermal efficiency of the engine. The injection characteristics of the system can affect the combustion and emission process of the engine. Injection stability is defined as variation characteristics of injection. This could have an unignored influence on combustion and engine output, while few study has been published. The primary objective is to establish evaluation systems and methods for injection stability. Then to study injection stability of the high pressure common rail system. Firstly, several parameters that have an important influence on the emission and combustion are identified. Based on the characteristics data obtained, it is verified that the stability parameters are in accordance with the normal distribution. Then, the five characteristic stability parameters of close speed of injection, cycle injection mass, injection delay, maximum injection rate and open speed of injection were quantitatively analyzed by using range, relative range, kurtosis and variance. It is found that the close speed of injection is greatly depend on injection pressure, the range of close speed varies from 1.8 to 5.1 mg/ms when rail pressure varies from 60 MPa to 160 MPa at 0.6 ms energizing time. The stability of injection mass depends on energizing time, the relative range in short energizing time can be four times than long energizing time. The maximum injection rate has similar characteristics with injection mass, it is also depends on energizing time. The range of maximum injection rate is reduced from the average of 0.6–0.7 mg/ms to 0.3 or even 0.2 mg/ms with the increase of energizing time. The injection delay and open speed of injection seems to be greatly affected by pressure fluctuation, since the observed data present complex rules. Pressure fluctuation in common rail can affect injection stability a lot.

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