scholarly journals A Phenomenological Model for Prediction Auto-Ignition and Soot Formation of Turbulent Diffusion Combustion in a High Pressure Common Rail Diesel Engine

Energies ◽  
2011 ◽  
Vol 4 (6) ◽  
pp. 894-912 ◽  
Author(s):  
Yongfeng Liu ◽  
Jianwei Yang ◽  
Jianmin Sun ◽  
Aihua Zhu ◽  
Qinghui Zhou
Keyword(s):  
High Pressure ◽  
Diesel Engine ◽  
Phenomenological Model ◽  
Turbulent Diffusion ◽  
Soot Formation ◽  
Common Rail ◽  
Diffusion Combustion ◽  
Auto Ignition ◽  
Turbulent Diffusion Combustion ◽  
High Pressure Common Rail

Calculation and Experiment of Soot Emission for a Directed Injection Engine

2011 ◽  
Vol 52-54 ◽  
pp. 1118-1124
Author(s):  
Yong Feng Liu ◽  
Hong Sen Tian ◽  
Jian Wei Yang ◽  
Jian Min Sun ◽  
Qin Hui Zhou
Keyword(s):  
High Pressure ◽  
Diesel Engine ◽  
Gas Phase ◽  
Common Rail ◽  
Auto Ignition ◽  
Soot Precursors ◽  
Polycyclic Aromatic ◽  
Zone Temperature ◽  
Soot Model ◽  
High Pressure Common Rail

To calculate soot for a high-pressure common rail diesel engine a new soot model (TP model) is presented.. In soot source term phase, when zone temperature T<1500K, gas-phase kinetics is considered and the soot precursors –PAHs (Polycyclic aromatic hydrocarbons) is calculated. When zone temperature T ≥ 1500K, the gas-phase chemistry and soot source terms are calculated. The soot model integrated with the new auto-ignition models is then applied in multidimensional simulations. The TP model is then implemented in KIVA code instead of original model to carry out optimizing. The results of soot with variation of injection time, variation of rail pressure and variation of speed among TP model, KIVA standard model and experimental data are analyzed. The results indicate that the TP model can carry out optimization and CFD (computational fluid dynamics) and can be a tool to calculate for a high-pressure common rail directed injection diesel engine.

scholarly journals Research On Fuel Compensation Control of High-pressure Common-Rail Diesel Engine Based On Crankshaft Segment Signals

2021 ◽  
Author(s):  
Yuhua Wang ◽  
Guiyong Wang ◽  
Guozhong Yao ◽  
Lizhong Shen ◽  
Shuchao He
Keyword(s):  
High Pressure ◽  
Diesel Engine ◽  
Fuel Injection ◽  
Common Rail ◽  
Engine Fuel ◽  
Quantization Method ◽  
Software Module ◽  
Fuel Supply ◽  
Compensation Control ◽  
High Pressure Common Rail

Abstract This paper studies the high-pressure common-rail diesel engine fuel supply compensation based on crankshaft fragment signals in order to improve the uneven phenomenon of diesel engine fuel supply and realize high efficiency and low pollution combustion. The experiments were conducted on a diesel engine with the model of YN30CR. Based on the characteristics of crankshaft fragment signals, the proportional integral (PI) control algorithm was used to quantify the engine working nonuniformity and extract the missing degree of fuel injection. The quantization method of each cylinder working uniformity and algorithm of fuel compensation control (FOC) based on crankshaft fragment signal were established, and the control strategy of working uniformity at different operating conditions was put forward. According to the principle of FOC control, a FOC control software module for ECU was designed. The FOC software module was simulated on ASCET platform. The results show that: Compared with the traditional quantization method, the oil compensation information extracted from crankshaft fragment signal has stronger anti-interference and more accurate parameters. FOC algorithm can accurately reflect the engine's working nonuniformity, and the control of the nonuniformity is reasonable. The compensation fuel amount calculated by FOC is high consistency with the fuel supply state of each cylinder set by experiment, which meets the requirement of accurate fuel injection control of common-rail diesel engine.

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