Soy-Biodiesel Impact on NOxEmissions and Fuel Economy for Diffusion-Dominated Combustion in a Turbo−Diesel Engine Incorporating Exhaust Gas Recirculation and Common Rail Fuel Injection

2009 ◽  
Vol 23 (12) ◽  
pp. 5821-5829 ◽  
Author(s):  
Gayatri Adi ◽  
Carrie Hall ◽  
David Snyder ◽  
Michael Bunce ◽  
Christopher Satkoski ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Fuel Economy ◽  
Fuel Injection ◽  
Exhaust Gas Recirculation ◽  
Common Rail ◽  
Exhaust Gas ◽  
Gas Recirculation

scholarly journals Nanoparticle number from biodiesel blends combustion in a common rail fuel injection system diesel engine equipped with exhaust gas recirculation

2009 ◽  
Vol 138 (3) ◽  
pp. 28-36
Author(s):  
Sathaporn CHUEPENG ◽  
Hongming XU ◽  
Athanasios TSOLAKIS ◽  
Mirosław WYSZYŃSKI ◽  
Jonathan HARLAND
Keyword(s):  
Particle Size ◽  
Diesel Engine ◽  
Particle Number ◽  
Fuel Injection ◽  
Exhaust Gas Recirculation ◽  
Common Rail ◽  
Injection System ◽  
Fuel Injection System ◽  
Exhaust Gas ◽  
Gas Recirculation

The paper presents characterisations of nanoparticle number in exhaust gases from biodiesel blends (B30, 30% of RME by volume with ultra low sulphur diesel fuel, ULSD) combustion in a V6 diesel engine equipped with a common rail fuel injection system. The engine was operated on three steady-state test points extracted from the New European Driving Cycle without engine hardware or the engine management system (EMS) modification. A fast differential mobility spectrometer was used to determine particle number size distribution based on electrical mobility equivalent diameter. The distribution was dependent on the engine operating condition and the rate of exhaust gas recirculation (EGR). The particle size in the nucleation mode from B30 combustion with and without EGR is smaller than that of ULSD while giving higher number concentration for all engine operating conditions tested. However, in the accumulation mode with and without EGR, the smaller sizes and the lower total numbers from B30 combustion were observed. For both fuels, EGR shows insignificant changes to the primary particle size but noticeable increase in particle size and number in the accumulation mode. In overall, compared to the ULSD case, the B30 combustion reduced particle size and lowered total particle number in exhaust gas emitted from the engine with EGR.

Diesel Engine Intake Condition Control-Oriented Models for Active Fuel Injection Profile Control

2011 ◽  
Author(s):  
Fengjun Yan ◽  
Junmin Wang
Keyword(s):  
Diesel Engine ◽  
Diesel Engines ◽  
Fuel Injection ◽  
Combustion Process ◽  
Exhaust Gas Recirculation ◽  
High Fidelity ◽  
Exhaust Gas ◽  
Engine Model ◽  
Profile Control ◽  
Gas Recirculation

Fueling control in Diesel engines is not only of significance to the combustion process in one particular cycle, but also influences the subsequent dynamics of air-path loop and combustion events, particularly when exhaust gas recirculation (EGR) is employed. To better reveal such inherently interactive relations, this paper presents a physics-based, control-oriented model describing the dynamics of the intake conditions with fuel injection profile being its input for Diesel engines equipped with EGR and turbocharging systems. The effectiveness of this model is validated by comparing the predictive results with those produced by a high-fidelity 1-D computational GT-Power engine model.

Biodiesel Combustion and Emissions in Engines Using Modern Common-Rail Fuel Injection Systems

2008 ◽  
Author(s):  
Prashanth K. Karra ◽  
Matthias K. Veltman ◽  
Song-Charng Kong
Keyword(s):  
Fuel Injection ◽  
Injection Pressure ◽  
Exhaust Gas Recirculation ◽  
Common Rail ◽  
Injection System ◽  
Injection Timing ◽  
Fuel Injection System ◽  
Nox Emissions ◽  
Exhaust Gas ◽  
Gas Recirculation

This study performed experimental testing of a multi-cylinder diesel engine using different blends of biodiesel and diesel fuel. The engine used an electronically-controlled common-rail fuel injection system to achieve a high injection pressure. The operating parameters that were investigated included the injection pressure, injection timing, and exhaust gas recirculation rate. Results showed that biodiesel generally reduced soot emissions and increased NOx emissions. The increase in NOx emissions was not due to the injection timing shift when biodiesel was used because the present fuel injection system was able to give the same fuel injection timing. At high exhaust gas recirculation rates, emissions using regular diesel and 20% biodiesel blends are very similar while 100% biodiesel produces relatively different emission levels. Therefore, the increase in NOx emissions may not be a concern when 20% biodiesel blends are used with high exhaust gas recirculation rates in order to achieve low temperature combustion conditions.

scholarly journals Enhancement of combustion characteristics of VCR diesel engine by optimizing engine parameters

2021 ◽  
Vol 3 (8) ◽  
Author(s):  
Prabhakara Rao Ganji ◽  
Rajesh Khana Raju Vysyaraju ◽  
Srinivasa Rao Surapaneni ◽  
B. Karuna Kumar
Keyword(s):  
Diesel Engine ◽  
Compression Ratio ◽  
Fuel Injection ◽  
Injection Pressure ◽  
Exhaust Gas Recirculation ◽  
Exhaust Gas ◽  
Performance And Emission ◽  
Start Of Injection ◽  
Fuel Injection Pressure ◽  
Gas Recirculation

AbstractIn recent years, engine emissions have been one of the important problems which are of great concern. Hence, there is a growing need to develop engines with reduced emission. In the present study, Variable Compression Ratio diesel engine model has been validated by comparing the simulation results with the experimental. The study is aimed at analyzing the effect of compression ratio, exhaust gas recirculation, fuel injection pressure and start of injection on engine performance and emission characteristics. Using composite desirability technique, the engine parameters have been optimized to achieve lower NOx, soot and ISFC. The optimum combination has been observed at Compression ratio 17.52, Start of injection −30.1 °aTDC, Fuel injection pressure 736.06 bar and Exhaust gas recirculation 28.29%. ISFC, NOx and soot are reduced by 2.37%, 29.11% and 83.81% respectively. Higher Target Fuel Distribution Index indicates the improved mixture homogeneity for the optimized parameters.

Exhaust gas recirculation effect on the performance of a CRDI diesel engine fuelled with linseed biodiesel/diesel blend through response surface methodology

2021 ◽  
pp. 095440622110263
Author(s):  
Varun Kumar Singh ◽  
Naushad Ahmad Ansari ◽  
Abhishek Sharma ◽  
Samsher Gautam ◽  
Manish Kumar ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Diesel Engine ◽  
Response Surface ◽  
Fuel Injection ◽  
Linseed Oil ◽  
Injection Pressure ◽  
Exhaust Gas Recirculation ◽  
Exhaust Gas ◽  
Oxides Of Nitrogen ◽  
Gas Recirculation

Biodiesel such as linseed oil can be derived from the feedstock of vegetables without disturbing supplies of food and the ecosystem. An experimental and comparative analysis was carried out to explore the effect of exhaust gas recirculation (EGR) and fuel injection pressure (FIP) on the emissions and efficiency of a CRDI diesel engine fuelled with linseed biodiesel/diesel blend. The engine characteristics were calculated using variable EGR (up to 14%) and adjustment of the injection pressure (up to 600 bar) under various load conditions. Multiple regression models were generated to evaluate responses such as Carbon monoxide (CO), Oxides of Nitrogen (NOx), hydrocarbon (HC), Brake power (BP), and Brake thermal efficiency (BTE) using response surface methodology (RSM). For all blends, a combination of FIP and EGR was employed and their impact was evaluated by plotting response surface contour. In RSM, the desirability approach is used to maximize the performance and minimize the emissions parameters of the engine. Linseed/diesel blend ratio 18.3%, FIP 576.76 bar, EGR 7.07%, and load 5.76 kg were estimated to be optimum for the tested engine. From this methodology, it was found that the optimal value of BTE, BP, HC, NOx, and CO is 19.55%, 1.758 kW, 16.7534 ppm, 505.56 ppm, and 0.0676% respectively.

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