The Influence of Fuel Injection Pressure and Intake Pressure on Conventional and Low Temperature Diesel Combustion

2012 ◽  
Author(s):  
Sangwook Han ◽  
Choongsik Bae
Keyword(s):  
Low Temperature ◽  
Fuel Injection ◽  
Injection Pressure ◽  
Diesel Combustion ◽  
Intake Pressure ◽  
Fuel Injection Pressure

On the Relationship Between Fuel Injection Pressure and Two-Stage Ignition Behavior of Low Temperature Diesel Combustion

2012 ◽  
Vol 134 (4) ◽  
Author(s):  
J. A. Bittle ◽  
T. J. Jacobs
Keyword(s):  
Low Temperature ◽  
Literature Review ◽  
Fuel Injection ◽  
Injection Pressure ◽  
Low Temperature Combustion ◽  
Combustion Duration ◽  
Stage Combustion ◽  
Temperature Combustion ◽  
Fuel Injection Pressure ◽  
The Relationship

In previous work, it is reported that increased dilution at midrange injection pressures produces longer first stage combustion duration. There is also corresponding decreases in nitric oxide concentrations and smoke number with respect to a reference conventional combustion mode. Continuing this effort, the objective of this study is to investigate the effect of injection pressure on the first stage ignition duration under low temperature combustion (LTC) conditions. A sweep of injection pressure is performed and the resulting heat (energy) release profiles are examined. The ignition delay behavior is expected based on changing injection pressure, but the first stage ignition duration does not follow expected trends based on initial literature review. It is postulated that the influence of injection pressure on the local equivalence ratios is causing the observed behavior. The appropriate measurement and analysis tools are not available to the authors to confirm this postulation. A literature review of work investigating ignition conditions in low temperature combustion modes is used to support the postulation made in this study.

scholarly journals Effect of Fuel Injection Pressure on Diesel Combustion

1988 ◽  
Vol 23 (1) ◽  
pp. 47-54
Author(s):  
Atsushi Sakane ◽  
Saiji Toshioka ◽  
Tetsuhiro Sumimoto ◽  
Yoshisuke Hamamoto
Keyword(s):  
Fuel Injection ◽  
Injection Pressure ◽  
Diesel Combustion ◽  
Fuel Injection Pressure

On the Relationship Between Fuel Injection Pressure and Two-Stage Ignition Behavior of Low Temperature Diesel Combustion

2011 ◽  
Author(s):  
J. A. Bittle ◽  
T. J. Jacobs
Keyword(s):  
Low Temperature ◽  
Literature Review ◽  
Fuel Injection ◽  
Injection Pressure ◽  
Low Temperature Combustion ◽  
Cool Flame ◽  
Stage Combustion ◽  
Temperature Combustion ◽  
Fuel Injection Pressure ◽  
The Relationship

In previous work, it is reported that increased dilution at mid-range injection pressures produces longer first stage combustion (cool-flame) duration. There is also corresponding decreases in nitric oxide concentrations and smoke number with respect to a reference conventional combustion mode. Continuing this effort, the objective of this study is to investigate the effect of injection pressure on the cool-flame duration under low temperature combustion conditions. A sweep of injection pressure is performed and the resulting heat release profiles are examined. The ignition delay behavior is expected based on changing injection pressure, but the cool-flame duration does not follow expected trends based on initial literature review. It is postulated that the influence of injection pressure on the local equivalence ratios is causing the observed behavior. The appropriate measurement and analysis tools are not available to the authors to confirm this postulation. A literature review of work investigating ignition conditions in low temperature combustion modes is used to support the postulation made in this study.

Analysis of Mixture Formation and Flame Development of Diesel Combustion Using a Rapid Compression Machine and Optical Visualization Technique

2013 ◽  
Vol 315 ◽  
pp. 293-298 ◽  
Author(s):  
Amir Khalid ◽  
Bukhari Manshoor
Keyword(s):  
Fuel Injection ◽  
Injection Pressure ◽  
Exhaust Emissions ◽  
Combustion Characteristics ◽  
Diesel Combustion ◽  
Rapid Compression Machine ◽  
Mixture Formation ◽  
Optical Visualization ◽  
Flame Development ◽  
Rapid Compression

Mixture formation plays as a key element on burning process that strongly affects the exhaust emissions such as nitrogen oxide (NOx) and Particulate Matter (PM). The reductions of emissions can be achieved with improvement throughout the mixing of fuel and air behavior. Measurements were made in an optically-accessible rapid compression machine (RCM) with intended to simulate the actual diesel combustion related phenomena. The diesel combustion was simulated with the RCM which is equipped with the Denso single-shot common-rail fuel injection system, capable of a maximum injection pressure up to 160MPa. Diesel engine compression process could be reproduced within the wide range of ambient temperature, ambient density, swirl velocity, equivalence ratio and fuel injection pressure. The mixture formation and combustion images were captured by the high speed camera. Analysis of combustion characteristics and observations of optical visualization of images reveal that the mixture formation exhibit influences to the ignition process and flame development. Therefore, the examination of the first stage of mixture formation is very important consideration due to the fuel-air premixing process linked with the combustion characteristics. Furthermore, the observation of a systematic control of mixture formation with experimental apparatus enables us to achieve considerable improvements of combustion process and would present the information for fundamental understanding in terms of reduced fuel consumption and exhaust emissions.

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