Study on Exhaust Gas Heating with Electric Heater for Heavy-Duty Diesel Engine

Abstract

In this study, the characteristics of exhaust gas temperature rise for different EH install positions was evaluated by experiments. In addition, the effect of EH install positions on the NOx purification rate in WHTC-cold test cycle was evaluated by simulation. As a result, when heated with EH installed on the front of SCR, exhaust gas reached target temperature rapidly, and therefore higher NOx purification rate was obtained. Also, it was suggested that electricity supplied to EH until the exhaust gas reach target temperature can be compensated by the power recovered with braking regeneration by combining with high-efficient braking regenerative systems.