Investigations of HCCI Combustion Using Multi-Stage Direct-Injection with Synthetic Fuels

“…Low distillation characteristics also reduce PM emissions by improving fuel dispersion. 15 Lower NO x emissions result from the high H/C ratio and cetane number of CFT, which lowers the adiabatic flame temperature 16 and shortens the ignition delay and premixed combustion period, 9 consequently suppressing the formation of NO x . Carbon dioxide (CO 2 ) is a greenhouse gas, and production of CO 2 by burning fossil fuels is a cause of increasing world concern.…”

Section: Resultsmentioning

confidence: 99%

“…The reduction in PM emissions is primarily due to the extremely low sulfur and aromatic contents of the CFT, diminishing sulfate and soot formation, and hence the amount of PM. Low distillation characteristics also reduce PM emissions by improving fuel dispersion . Lower NO x emissions result from the high H/C ratio and cetane number of CFT, which lowers the adiabatic flame temperature and shortens the ignition delay and premixed combustion period, consequently suppressing the formation of NO x .…”

Section: Resultsmentioning

confidence: 99%

Potential for Reduction of Exhaust Emissions in a Common-Rail Direct-Injection Diesel Engine by Fueling with Fischer–Tropsch Diesel Fuel Synthesized from Coal

et al. 2011

View full text Add to dashboard Cite

Fischer−Tropsch diesel fuel has desirable physicochemical properties, with the potential to significantly reduce diesel exhaust emissions. This paper evaluates the effects of the use of Fischer−Tropsch diesel fuel synthesized from coal (CFT) on diesel exhaust emissions. A four-cylinder common-rail direct-injection diesel engine fueled with Fischer−Tropsch diesel fuel synthesized from coal, diesel fuel, and blends of the two (15, 30, and 50% CFT by volume) was used. Tests were conducted using the European stationary cycle (ESC) and constant speed/varying load test modes. In the ESC test mode, the brake-specific regulated emissions were reduced by increasing the proportion of CFT in the fuel, achieving reductions of 3.2−33.9% for carbon monoxide, 3.6−39.3% for total unburned hydrocarbon, 0.1−11.8% for nitrogen oxides, and 1.0−25.5% for particulate matter; also, a marginal decrease in the brake-specific carbon dioxide was observed. In the constant speed/varying load test modes, the use of CFT also resulted in a general reduction of regulated emissions. The percentage reductions of carbon monoxide, total unburned hydrocarbon, and nitrogen oxide emissions at low engine speed were much lower than those observed at medium and high engine speeds, while there was no significant difference in the percentage reduction of particulate matter to be observed between the three levels of engine speed. At medium and high engine speeds, the percentage reduction of carbon monoxide showed a decreasing trend with an increasing engine load, and the percentage reduction of particulate matter at light engine loads was higher than at medium or high engine loads. In addition, the geometric mean diameter of particles exhibited a slight drop as the CFT ratio in the fuel was increased. CFT has a weak ability in reducing the total particulate count when compared to Fischer−Tropsch diesel fuels synthesized from natural gas.

show abstract

“…In the two-colour method, detection at two wavelengths is necessary to solve equation (2). The radiation can be detected in the visible and infrared regions [19, 20]. Visible wavelengths are preferred because the sensitivity of the measuring system to changes in the flame temperature is greater than that in the infrared region.…”

Section: Methodsmentioning

confidence: 99%

Development of a high-speed two-colour system and its application to in-cylinder diesel combustion temperature and soot measurements with split injections

Diez

Zhao

Carrozzo

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

In the present study, a high-speed two-colour system was developed in order simultaneously to investigate the temporal and spatially resolved flame temperature and soot concentration (the KL factor) in the combustion chamber of a diesel engine during the same engine cycle. The new two-colour system features a high-speed video camera and a high-repetition image intensifier. It is capable of capturing images at a high sampling frequency, so as to allow the possibility of investigating the flame temperature and soot distribution throughout a complete engine cycle. The system was calibrated against a tungsten ribbon lamp and tested on a Ricardo Hydra single-cylinder diesel engine for the in-cylinder diesel combustion temperature and soot diagnostics. Videos of combustion were taken through the optical access to the combustion chamber, and the radiation intensity was correlated with the analysed calibration data. The two-colour method was used to study the influence of the injection timing on the nitrogen oxide and soot emissions and the relation between the time histories of the local flame temperature, the soot concentration (the KL factor), and the exhaust emissions.

show abstract

Investigations of HCCI Combustion Using Multi-Stage Direct-Injection with Synthetic Fuels

Cited by 11 publications

References 15 publications

Impact of acetaldehyde and NO addition on the 1-octene oxidation under simulated HCCI conditions

Impact of acetaldehyde and NO addition on the 1-octene oxidation under simulated HCCI conditions

Potential for Reduction of Exhaust Emissions in a Common-Rail Direct-Injection Diesel Engine by Fueling with Fischer–Tropsch Diesel Fuel Synthesized from Coal

Development of a high-speed two-colour system and its application to in-cylinder diesel combustion temperature and soot measurements with split injections

Contact Info

Product

Resources

About