Diesel engines injection process is essential for optimum operation to maintain the design power and torque requirements and to satisfy stricter emissions legislations. In general this process is highly dependent upon the injection pump and fuel injector health. However, extracting such information about the injector condition using needle movements or vibration measurements without affecting i...

Biodiesel as a clean energy source could reduce environmental pollution compared to fossil fuel, so it is becoming increasingly important. In this study, we investigated the effects of different pilot injection timings from before top dead center (BTDC) and exhaust gas recirculation (EGR) on combustion, engine performance, and exhaust emission characteristics in a common rail diesel engine fuel...

--Stringent emission norms and environment degradation due to pollutants from the automotive vehicles lead us to find the suitable alternative for the petro-diesel. Among the alternatives the non-edible vegetable oil seems to be most promising one. When the vegetable oil is used as fuel in diesel engine, it does not cause any major problem if used for a short period. However in the long run it ...

The spark energy transferred under the highly stratified conditions during late injection in a spray-guided spark-ignition direct-injection (SG-SIDI) engine is not well characterized. The impact of high pressures, temperatures, velocities, and variations in local fuel concentration along with temporal and/or spatial variations on spark performance must be better characterized. Previous spark ig...

The aim of this work is to investigate the influence of NO/SO2 on the emissions of N2O from diesel engine. A direct-injection diesel engine (model NF-19SK YANMAR) one cylinder was employed to test the emission. This engine works on fourstroke cycle and was operated at 2200 rpm by 25, 50, and 75% engine load. The experiment by three level sulfur content of fuel by adding DBDS into MDO and experi...

During the development of a CN Ⅵ light vehicle equipped with GDI gasoline engine, phenomenon high PN appeared. In response to operating conditions engine running in WLTC cycle, corresponding SOI sweep was performed on dyno bench. The emissions has reduced by optimizing SOI. results show that when is sufficiently advanced, oil film formed collision spray and piston causes increase significantly....

............................................................................................................. I ACKNOWLEDGEMENTS .................................................................................... II LIST OF PAPERS................................................................................................. III BACKGROUND.........................................................

Until the early 1990s, predominant method of fuel delivery for compression ignition engines was mechanical pump-line-nozzle system. These systems typically consisted a cam-driven pump that would send pressurized to injectors where injection timing fixed according pressure needed overcome spring injector needle. configurations were robust; however, they limited single event per thermodynamic cyc...