Marvin SaschaWahl presents the possibilities for optimising diesel engine combustion. In the advanced process of partially premixed diesel combustion, nitrogen oxide and soot emissions can be minimised at the same time. A new feature is the possibility of applying this strategy up to 2000 revolutions and 10 bar indicated mean pressure. In this work, various effective parameters are also compared and correlated with each other. A final comparison with conventional diesel combustion shows the advantages and disadvantages and evaluates them.
Author(s): Marvin Sascha Wahl
Series: Wissenschaftliche Reihe Fahrzeugtechnik Universität Stuttgart
Publisher: Springer Vieweg
Year: 2023
Language: English
Pages: 151
City: Stuttgart
Preface
Contents
Figures
Tables
Abbreviations
Symbols
Kurzfassung
Abstract
1 Introduction and State of Research
1.1 Conventional Diesel Combustion
1.2 Alternative Diesel Combustion
1.2.1 HCCI
1.2.2 HPLI
1.2.3 HCLI
1.2.4 DCCS
1.2.5 PCCI
1.3 The Disadvantage of Conventional Diesel Combustion on Soot and Nitrogen Oxide
1.4 Specification of the Two-Stage Ignition Delay
1.5 Empirical Ignition Delay Model
2 Thermodynamic Basics to Evaluate PCCI Measurements
2.1 The Diesel Cycle and the Benefits of Thermal Efficiency
2.2 Rate of Heat Release and Burn Rate to Characterize the Combustion Process
2.3 Premixed Combustion: The Positive and Negative Influence on Emission
2.4 Gas Exchange Calculation
3 Single-Cylinder Test Bench and Measurement Equipment
3.1 Particulate Matter Measurement
3.2 Nitrogen Oxide Measurement
3.3 Additional Pollutant Measurement
3.4 Injection System Measurement
3.5 Indication System for Intake, Exhaust, and In-Cylinder Pressure Measurement
4 Test Bench Measurements and Analysis
4.1 Single-Cylinder Mercedes Benz OM642
4.2 Introduction to the Test Bench Measurements and the Ignition Delay for PCCI
4.3 Premixed Charge Compression Ignition Measurements
4.3.1 Pre-Injection Variation
4.3.2 EGR Rate Variation
4.3.3 Main-Injection Variation
4.3.4 Intake Air Temperature Variation
4.3.5 Fuel Pressure Variation
4.4 Conventional Diesel Measurements
4.5 Evaluation, Discussion and Comparison of PCCI and Conventional Diesel Injection Strategies Concerning Combustion and Engine-Out Emissions
5 Empirical Based Model to Depict Ignition Delays for PCCI
6 Summary and Conclusions
References
Appendix
A1. Diesel Fuel Test Result
