Technology Outline (Process Description)

Combustion Heterogeneity is a major factor for the improper utilization of fuel energy in a CI engine. This phenomenon not only restricts the performance of the engine but also is responsible for majority of its tail pipe emission. Conventional Diesel combustion (CDC) do not provide sufficient combustion homogeneity due to shorter injection window and incomplete strati- fication. To this end, an attempt has been made to increase homogeneity of combustion by incorporating dual fuel strategy where Biodiesel-Hydrogen combination has been used under the Reactivity Controlled Compression Ignition (RCCI) mode. Biodiesel, due to its higher cetane number, is used as high reactive fuel (HRF) and Hydrogen is used as low reactive fuel (LRF). The ECU is programmed to extend the injection angles of the HRF upto 110°bTDC. The effects of HRF injection angles from 30°bTDC to 90°bTDC and the premix ratio from 10% to 70% have been investigated in this work. The injection advancement allowed better mixing of the HRF with the air whereas, higher participation of Hydrogen further improved the homogeneity of the charge.