Effect of Injection Rate Shaping over Diesel Spray Development in Non-Reacting Evaporative Conditions
To meet the continuous demand of low exhaust emissions and fuel consumption standards, researchers have focused on improving the overall efficiency of the internal combustion engines. One of the components that plays a fundamental role is the diesel direct injection system. Fuel needs to be delivered to the combustion chamber with specific conditions to promote mixing. which has a key role in the spray formation and combustion development, thus in the reduction of contaminants . To this end, piezoelectric direct-acting injectors were introduced, as they provide direct control of the needle lift, thus rate of injection , among other numerous advantages . Furthermore, recent studies proved that liquid length is also governed by partial needle lift , adding an extra variable for combustion control, for example, to avoid wall impingement.
KeywordsInjection Pressure Test Chamber Schlieren Imaging High Injection Pressure Diesel Spray
Unable to display preview. Download preview PDF.