Paper Title
Split Injection Strategies for Biodiesel-Fueled Premixed Charge Compression Ignition Combustion Engine—Part II: Particulate Studies
Keywords
- Single-Cylinder Research Engine
- Particulate Matter Characteristics
- Premixed Charge Compression Ignition
- PCCI Mode Combustion
- Compression Ignition Mode
- CI Mode Combustion
- Biodiesel Blends
- B20 Fuel
- B40 Fuel
- Baseline Mineral Diesel
- Fuel Injection Pressure
- 700 Bar Injection Pressure
- Engine Speed 1500 RPM
- Fuel Energy Input
- Pilot Injection Strategies
- Single Pilot Injection
- SPI Strategy
- Double Pilot Injection
- DPI Strategy
- Start of Main Injection
- SoMI Timing
- PM Emission Reduction
- Trace Metal Analysis
- Chemical Characterization
- Transmission Electron Microscopy
- TEM Analysis
- Particulate Morphology
- Health Risk Assessment
- Alternative Fuels
- Sustainable Combustion
- Air Quality Improvement
Research Impact Tools
Publication Info
Volume: 142 | Issue: 12 | Pages: 122304
Published On
June, 2020
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Abstract
In this study, experiments were performed in a single-cylinder research engine to investigate the particulate matter (PM) characteristics of the engine operated in premixed charge compression ignition (PCCI) mode combustion vis-a-vis baseline compression ignition (CI) mode combustion using three test fuels, namely, B20 (20% v/v biodiesel blended with mineral diesel), B40 (40% v/v/ biodiesel blended with mineral diesel), and baseline mineral diesel. The experiments were carried out at constant fuel injection pressure (FIP) (700 bar), constant engine speed (1500 rpm), and constant fuel energy input (0.7 kg/h diesel equivalent). PM characteristics of PCCI mode combustion were evaluated using two different fuel injection strategies, namely, single pilot injection (SPI) (35 deg before top dead center (bTDC)) and double pilot injection (DPI) (35 deg and 45 deg bTDC) at four different start of main injection (SoMI) timings. Results showed that both PCCI mode combustion strategies emitted significantly lower PM compared to baseline CI mode combustion strategy. However, the blending of biodiesel resulted in relatively higher PM emissions from both CI and PCCI combustion modes. Chemical characterization of PM showed that PCCI mode combustion emitted relatively lower trace metals compared to baseline CI mode combustion, which reduced further for B20. For detailed investigations of particulate structure, morphological characterization was done using transmission electron microscopy (TEM), which showed that PM emitted by B20-fueled PCCI mode combustion posed potentially lower health risk compared to baseline mineral diesel-fueled CI mode combustion.
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