Effects of dynamic injection pressures on spray, combustion, and exhaust emission characteristics in a CRDI diesel engine with naval vessel fuel
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This study focuses on the experimental analysis of the effects of dynamic injection pressures on diesel engine spray, combustion, and emission characteristics. Increasing the fuel injection pressure shortens the fuel injection delay and overall fuel injection duration. A higher fuel injection pressure increases the spray tip penetration. Increasing the fuel injection pressure increased the peak in-cylinder pressure, peak rate of pressure increase, peak rate of heat release, and peak gas mean temperature. As the in-cylinder pressure and rate of heat release increased, the indicated mean effective pressure tended to increase. A higher fuel injection pressure shortens the ignition delay, advances combustion phasing, and shortens the overall combustion duration. As the indicated mean effective pressure and rate of heat release increase, the fuel conversion and combustion efficiency tend to improve. Increasing the fuel injection pressure led to an increase in the ringing intensity. At higher fuel injection pressures, the combustion noise level tends to increase. As the fuel injection pressure increases, CO, CO2, and HC emissions decrease. However, increasing the fuel injection pressure contributed to an increase in the gas mean temperature and rate of heat release, which leads to greater NOx emissions.
Abstract
This study focuses on the experimental analysis of the effects of dynamic injection pressures on diesel engine spray, combustion, and emission characteristics. Increasing the fuel injection pressure shortens the fuel injection delay and overall fuel injection duration. A higher fuel injection pressure increases the spray tip penetration. Increasing the fuel injection pressure increased the peak in-cylinder pressure, peak rate of pressure increase, peak rate of heat release, and peak gas mean temperature. As the in-cylinder pressure and rate of heat release increased, the indicated mean effective pressure tended to increase. A higher fuel injection pressure shortens the ignition delay, advances combustion phasing, and shortens the overall combustion duration. As the indicated mean effective pressure and rate of heat release increase, the fuel conversion and combustion efficiency tend to improve. Increasing the fuel injection pressure led to an increase in the ringing intensity. At higher fuel injection pressures, the combustion noise level tends to increase. As the fuel injection pressure increases, CO, CO2, and HC emissions decrease. However, increasing the fuel injection pressure contributed to an increase in the gas mean temperature and rate of heat release, which leads to greater NOx emissions.
참고문헌 (25)
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