Progress and recent trends in homogeneous charge compression ignition (HCCI) engines

Review of the effects of biodiesel on NOx emissions

4.1. Noble Metals 4058 4.1.1. Platinum 4059 4.1.2. Palladium 4060 4.1.3. Bimetallic Systems 4060 4.2. Storage Components 4061 4.2.1. Earth Alkaline Metals 4061 4.2.2. Alkali Metals 4065 4.3. Supports 4065 4.3.1. Single Oxides 4065 4.3.2. Mixed Oxides 4067 4.4. Promoters 4069 4.5. Preparation Methods 4071 4.6. Influence of Remote Control 4073 5. Influence of Exhaust Gas Composition 4074 5.1. Reducing Gas 4074 5.2. Water 4077 5.3. Carbon Dioxide 4077 5.4. Impact of Soot 4079 6. Theoretical and Surface Science Studies 4079 6.1. Theoretical Studies 4079 6.2. Studies on Well-Defined Model Catalysts 4082 7. Reactor Configuration 4082 8. Conclusions and Outlook 4086 9. Acknowledgments 4087 10. References 4087

NOx Storage−Reduction Catalysis: From Mechanism and Materials Properties to Storage−Reduction Performance

Effects of soybean biodiesel on a DI diesel engine performance, emission and combustion characteristics

Fuel design and management for the control of advanced compression-ignition combustion modes

Combustion and emission characteristics of DME as an alternative fuel for compression ignition engines with a high pressure injection system

Effect of a narrow fuel spray angle and a dual injection configuration on the improvement of exhaust emissions in a HCCI diesel engine

Various characteristics of dimethyl ether (DME) as an alternative fuel for compression ignition engines were experimentally investigated including its spray characteristics, combustion performance, and emission reduction in a common-rail diesel engine. The spray behavior of DME was analyzed in terms of injection rate, spray development, and spray tip penetration, which were measured by an injection rate meter and a high-pressure spray chamber equipped with a spray visualization system. In addition, the engine performance and indicated mean effective pressure (IMEP), as well as exhaust emissions, including oxides of nitrogen (NOx), soot, hydrocarbons, and carbon monoxide were measured at various injection and operating cycle parameters. The combustion characteristics of DME fuel were compared with those of conventional diesel fuel in a diesel engine. Experimental results show that DME has an injection delay 0.03 ms shorter and a maximum injection rate 21% higher than those of diesel fuel at a constant inje...

Experimental Investigation of Spray and Combustion Characteristics of Dimethyl Ether in a Common-Rail Diesel Engine

The effect of the premixed ratio and supply condition of premixed fuel on the combustion and emission characteristics of a partial homogeneous charge compression ignition (HCCI) engine has been investigated experimentally and numerically. The fuel, which is supplied by an additional port fuel injector in the intake manifold, is premixed with air. The homogeneous charge is compressed and ignited by directly injected diesel fuel in the combustion chamber. In this work, the experimental investigation is made by varying the supply conditions of the premixed fuel, such as the injection pressure and the intake temperature. Results show that a partial HCCI engine with a premixed gasoline fuel shows single-stage ignition and the increase in premixed ratio of gasoline fuel results in the advance of ignition timing and the remarkable reduction of nitrogen oxide emission of the engine. Also, heating the intake air is useful for reducing the HC and CO emissions, which are regarded as one of the problems in the partia...

Effect of Premixed Gasoline Fuel on the Combustion Characteristics of Compression Ignition Engine

To investigate the effect of split injection on exhaust emissions, soot particulates, and engine performance, experimental investigations were conducted using an electrically controlled direct-injection diesel engine fueled with neat biodiesel derived from soybean. Split injection, with varied injection timing, was investigated, and the results were compared to those obtained by single injection. The experiments were conducted under a fixed engine load condition and a constant dwell time between the first and second injections. The results show that split injection reduces NOx emissions significantly without a significant increase in soot emissions. A markedly different tendency was found when injection timing was retarded for single and split injection cases. In the case of single injection, increasing soot, median particle diameter, and particle number concentration were seen in accordance with retarded injection timing. However, the reverse tendency was found for split injection.

Myung Yoon Kim

Papers

Combustion and emission characteristics of DME as an alternative fuel for compression ignition engines with a high pressure injection system

Effect of a narrow fuel spray angle and a dual injection configuration on the improvement of exhaust emissions in a HCCI diesel engine

Experimental Investigation of Spray and Combustion Characteristics of Dimethyl Ether in a Common-Rail Diesel Engine

Effect of Premixed Gasoline Fuel on the Combustion Characteristics of Compression Ignition Engine

Impact of Split Injection Strategy on the Exhaust Emissions and Soot Particulates from a Compression Ignition Engine Fueled with Neat Biodiesel