Investigating Pre-Mixed Charge Compression Ignition Combustion in a High Compression Ratio Engine

2018 ◽  
Author(s):  
Charu Srivatsa ◽  
Jonathan Mattson ◽  
Christopher Depcik
Keyword(s):  
Compression Ratio ◽  
Compression Ignition ◽  
High Compression Ratio ◽  
High Compression ◽  
Compression Ignition Combustion

Investigation of Gasoline Compression Ignition (GCI) Combustion in a High Compression-Ratio Heavy-duty Single-Cylinder Diesel Engine

2021 ◽  
Author(s):  
Khanh Cung ◽  
Daniel Christopher Bitsis ◽  
Jason Miwa ◽  
Edward Smith ◽  
Thomas Briggs ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Compression Ratio ◽  
Compression Ignition ◽  
Heavy Duty ◽  
High Compression Ratio ◽  
Single Cylinder ◽  
High Compression

Performance and Emission Analysis of Partially Premixed Charge Compression Ignition Combustion

2019 ◽  
Vol 141 (6) ◽  
Author(s):  
Charu Vikram Srivatsa ◽  
Jonathan Mattson ◽  
Christopher Depcik
Keyword(s):  
Compression Ratio ◽  
Fuel Injection ◽  
Load Condition ◽  
Injection System ◽  
Compression Ignition ◽  
High Compression Ratio ◽  
High Compression ◽  
Ci Engine ◽  
Partially Premixed ◽  
Load Conditions

In order to investigate the performance and emissions behavior of a high compression ratio compression ignition (CI) engine operating in partially premixed charge compression ignition (PPCI) mode, a series of experiments were conducted using a single-cylinder engine with a high-pressure rail fuel injection system. This included a moderately advanced direct injection strategy to attempt PPCI combustion under low load conditions by varying the injection timing between 25 deg and 35 deg before top dead center (BTDC) in steps of 2.5 deg. Furthermore, during experimentation the fuel injection pressure, engine speed, and engine torque were kept constant. Performance parameters and emissions were measured and analyzed using a zero-dimensional heat release model. Compared to the baseline conventional 12.5 deg BTDC injection, in-cylinder pressure and temperature were higher at advanced timings for all load conditions considered. Additionally, NOx, PM, CO, and total hydrocarbon (THC) were higher than conventional results at the 0.5 N·m load condition. While PM emissions were lower, and CO and THC emissions were comparable to conventional injection results at the 1.5 N·m load condition between 25 deg and 30 deg BTDC, NOx emissions were relatively high. Hence, there was limited success in beating the NOx-PM trade-off. Moreover, since the start of combustion (SOC) occurred BTDC, the resulting higher peak combustion pressures restricted the operating condition to lower loads. As a result, further investigation including exhaust gas recirculation (EGR) and/or variance in fuel cetane number (CN) is required to achieve PPCI in a high compression ratio CI engine.

Experimental investigation of methanol compression ignition in a high compression ratio HD engine using a Box-Behnken design

Fuel ◽  
2017 ◽  
Vol 209 ◽  
pp. 624-633 ◽  
Author(s):  
Sam Shamun ◽  
Can Haşimoğlu ◽  
Ahmet Murcak ◽  
Öivind Andersson ◽  
Martin Tunér ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Compression Ratio ◽  
Compression Ignition ◽  
High Compression Ratio ◽  
Box Behnken Design ◽  
High Compression

scholarly journals Gasoline Compression Ignition (GCI) Combustion of Pump-grade Gasoline Fuel under High Compression Ratio Diesel Engine

2021 ◽  
pp. 100066
Author(s):  
Khanh Cung ◽  
Ahmed Moiz ◽  
Mike Smith ◽  
Chris Bitsis ◽  
Thomas Briggs ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Compression Ratio ◽  
Compression Ignition ◽  
High Compression Ratio ◽  
High Compression

scholarly journals Combustion exhaust release impact, diesel engine performance, and optimization studies of green diesel-petrodiesel blend in a high compression ratio direct-injection compression-ignition engine

2021 ◽  
Vol 13 (5) ◽  
pp. 168781402110187
Author(s):  
Okechukwu Dominic Onukwuli ◽  
Chizoo Esonye ◽  
Akuzuo Uwaoma Ofoefule
Keyword(s):  
Diesel Engine ◽  
Compression Ratio ◽  
Engine Performance ◽  
Compression Ignition ◽  
Optimum Conditions ◽  
High Compression Ratio ◽  
Compression Ignition Engine ◽  
Fuel Blend ◽  
Brake Power ◽  
High Compression

Reports on the optimum brake-power, surrogate fuel, engine emissions, and efficiency using hybrid model on high compression ratio diesel engines are very imperative for effective application of biodiesel in power and renewable energy generation. This study presents Dyacrodes edulis biodiesel engine performance and combustion release optimization using response surface methodology-genetic algorithm (RSM-GA) as well as the variation of key engine efficiency and exhaust release indices with brake power and fuel blend in a high compression ratio (CR) diesel engine. Combustion emission impacts of the blends with respect to petro-diesel decreased in values except for NOX. Brake thermal efficiency (BTE), brake specific fuel consumption (BSFC), brake mean effective pressure (BMEP), volumetric efficiency, and exhaust temperature increased with brake power while specific energies decreased with load. Optimum conditions obtained using integrated RSM-GA were 40.03%, 0.05 kg/kW-h, 0.03%, 132.30 ppm, and 18.84 ppm for BTE, BSFC, CO, NOx, and HC respectively at low factor (engine load, engine speed, and fuel blend) conditions. At the optimum conditions, the experimental validation results were 44.01%, 0.05 kg/kW-h, 0.04%, 130.05 ppm, and 20.33 ppm for BTE, BSFC, CO, NOx, and HC respectively. The application of the feedstock in compression ignition engine is viable.

Performance and Emissions Analysis of Partially Pre-Mixed Charge Compression Ignition Combustion

2018 ◽  
Author(s):  
Charu Vikram Srivatsa ◽  
Jonathan Mattson ◽  
Christopher Depcik
Keyword(s):  
Compression Ratio ◽  
Fuel Injection ◽  
Load Condition ◽  
Compression Ignition ◽  
Cylinder Pressure ◽  
High Compression Ratio ◽  
High Compression ◽  
Performance And Emissions ◽  
Ci Engine ◽  
Load Conditions

In order to investigate the performance and emissions behavior of a high compression ratio Compression Ignition (CI) engine operating in Partially Premixed Charge Compression Ignition (PPCI) mode, a series of experiments were conducted using a single cylinder naturally aspirated engine with a high-pressure rail fuel injection system. This included a moderately advanced direct injection strategy to attempt PPCI combustion under low load conditions by varying the injection timing between 25° and 35° Before Top Dead Center (BTDC) in steps of 2.5°. Furthermore, during experimentation the fuel injection pressure, engine speed, and engine torque (through variance of the fuel injection quantity) were kept constant. In-cylinder pressure, emissions, and performance parameters were measured and analyzed using a zero-dimensional heat release model. Compared to the baseline conventional 12.5° BTDC injection, in-cylinder pressure and temperature was higher at advanced timings for all load conditions considered. Additionally, NOx, PM, CO, and THC were higher than conventional results at the 0.5 N-m load condition. While PM emissions were lower, and CO and THC emissions were comparable to conventional injection results at the 1.5 N-m load condition between 25° and 30° BTDC, NOx emissions were relatively high. Hence, there was limited success in beating the NOx-PM tradeoff. In addition, since Start of Combustion (SOC) occurred BTDC, the resulting higher peak combustion pressures restricted the operating condition to lower loads to ensure engine safety. As a result, further investigation including Exhaust Gas Recirculation (EGR) and/or variance in fuel Cetane Number (CN) is required to achieve PPCI in a high compression ratio CI engine.

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