Conceptual models for partially premixed low-temperature diesel combustion

This review paper covers potential alternative fuels for automotive engine application for both spark ignition (SI) and compression ignition (CI) engines. It also includes applications of alternative fuels in advanced combustion research applications. The representative alternative fuels for SI engines include compressed natural gas (CNG), hydrogen (H 2 ) liquefied petroleum gas (LPG), and alcohol fuels (methanol and ethanol); while for CI engines, they include biodiesel, di-methyl ether (DME), and jet propellent-8 (JP-8). Naphtha is introduced as an alternative fuel for advanced combustion in premixed charge compression ignition. The production, storage, and the supply chain of each alternative fuel are briefly summarized, and are followed by discussions on the main research motivations for such alternative fuels. Literature surveys are presented that investigate the relative advantages and disadvantages of these alternative fuels for application to engine combustion. The contents of engine combustion basically consist of the combustion process from spray development, air–fuel mixing characteristics, to the final combustion product formation process, which is analyzed for each alternative fuel. An overview is provided for alternative fuels together with summaries of engine combustion characteristics for each fuel, in addition to its current distribution status and future prospects.

Alternative fuels for internal combustion engines

Experimental study of n-butanol additive and multi-injection on HD diesel engine performance and emissions

Laser-induced incandescence: Particulate diagnostics for combustion, atmospheric, and industrial applications

Dual-Fuel PCI Combustion Controlled by In-Cylinder Stratification of Ignitability

Development of Free Piston Engine Linear Generator System Part 1 - Investigation of Fundamental Characteristics

The effects of multiple-injection on exhaust emissions and performance in a small HSDI (High Speed Direct Injection) Diesel engine were examined The causes for the improvement were investigated using both in-cylinder observation and three-dimensional numerical analysis methods It is possible to increase the maximum torque, which is limited by the exhaust smoke number, while decreasing the combustion noise under low speed and full load conditions by advancing the timing of the pilot injection Dividing this early-timed pilot injection into two with a small fuel amount is effective for further decreasing the noise while suppressing the increase in HC emission and fuel consumption This is realized by the reduced amount of adhered fuel to the cylinder wall At light loads, the amount of pilot injection fuel must be reduced, and the injection must be timed just prior to the main injection in order to suppress a possible increase in smoke and HC After-injection, which injects a small amount of fuel immediately after the end of the main injection, reduces smoke, HC and fuel consumption This is because the jet flame of the after-injection carries the remaining soot of the main injection to the squish area, and then oxidizes that together with the soot which previously existed in the squish area by promoted atmospheric temperature and enhanced mixing with fresh air

/pdf/achieving-lower-exhaust-emissions-and-better-performance-in-2df2q23b4z.pdf

Yoshihiro Hotta

Papers

Development of Free Piston Engine Linear Generator System Part 1 - Investigation of Fundamental Characteristics

Achieving Lower Exhaust Emissions and Better Performance in an HSDI Diesel Engine with Multiple Injection

Development of Free Piston Engine Linear Generator System Part 2 - Investigation of Control System for Generator

Concept of “Temperature Swing Heat Insulation” in Combustion Chamber Walls, and Appropriate Thermo-Physical Properties for Heat Insulation Coat

Reduction of Heat Loss and Improvement of Thermal Efficiency by Application of “Temperature Swing” Insulation to Direct-Injection Diesel Engines