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Internal combustion engines play a key role in transportation and power generation sectors in which diesel engines occupy a prominent status. Reduction of exhaust emission in diesel engines is a difficult and challenging task without compromising the engine performance. Various parameters like injection timing, compression ratio, and injection pressure can be varied in order to attain the desired...
In the test, the engine run at a specific speed when fuel consumption (Be) and torque remained constant. An ETAS calibration system is used to control the Maps for adjusting the rail pressure and injection timing. Experimental data show that when fuel injection is delayed, fuel consumption, CO and HC increase while formation of NOx reduces. The formation rate of pre-mixed gas is proportional to the...
To improve the soot emissions performance of a common rail diesel engine, two combustion chambers with different diameter-depth ratio were designed under the conditions of the same compression ratio, and using CFD software to simulate the combustion process with different chamber shape and injection timing. The results showed that NOx emissions decreased with the delay of the injection timing, while...
Determine engine performance of a naturally aspirated direct injection diesel engine fueled with diesel and pungam methyl ester blend (PME20). Comparison of performance was done for different values of compression ratio, injection pressure and injection timing to find best possible combination for operating engine with PME20. It is found that the combined compression ratio of 19:1, injection pressure...
The effect of injector opening pressure and injection timing on cyclic variations in combustion parameters of a CI engine fuelled with methyl esters of jatropha oil blended with petroleum diesel for 20% volume ratio(B20) at full load, are reported in this paper. The experiments were carried out at three injection timings of 20°bTDC, 23°bTDC, 26°bTDC and four IOP's of 180, 200, 220 & 240 bar. It...
The challenge for the high speed direct injection (HSDI) diesel engines today is to reduce harmful emissions of diesel engines, such as particulate matter (PM) and Nitrogen oxides (NOx), and enhance the fuel efficiency and power. To meet this challenge, more accurate control of injection parameters such as the injection timing, injection rate, and injection quantity is required. Compared with solenoid...
Electronic control demand of heavy duty diesel engine requires injection parameter to mediate, in order to obtain good engine performance, electro-hydraulic injection timing actuator is developed, especially, a high-speed solenoid valve is chosen to control the actuator. The whole system sketch including electro-hydraulic injection timing actuator, control hardware, software and acquisition algorithm...
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