Energy-efficient heating strategies of diesel oxidation catalyst for low emissions vehicles

Electrically heated catalyst (EHC) is integrated with the exhaust aftertreatment system to reduce cold-start emissions. Implementation of this proposed emission control technology will also provide addition CO 2 and fuel consumption benefits. Developing an energy-efficient heating strategy has shown a significant reduction in time required for catalysts light-off from cold-start. In study, it was found first that novel pulsating pulse width 30 s compared typical improved THC emissions conversion efficiency up 34% 31%, respectively. contrast, further increase leads lower emissions' performance due extending off period consequently leading catalyst's light-out. Furthermore, combined electrical post-injection can benefit EHC's quick higher post-injection, which showed improvement DOC's performance. This approach result efficiencies be critical meet legislations. An outlet temperature beneficial downstream component heating, e.g. DPF regeneration. • At engine cold-start, hydrocarbon (HC) carbon monoxide (CO) are high. Energy-efficient reduces light-off. Electrical heater enhances oxidation over diesel catalyst. Novel by 31%. thermal management potential hybrid vehicles.