Electrically heated catalyst for thermal management in modern vehicle applications

Gaseous emissions of a heavy-duty engine fueled with polyoxymethylene dimethyl ethers (OME) in transient cold-start operation and methods for after-treatment system heating

“…In addition, the MS employed was calibrated for quantitative OME concentration measurement at a higher sensitivity than the FT-IR used. Moreover, electrical heating of the DOC according to Maus et al 33 was employed in combination with the fuel dosing suggested by Gelner et al 31 The operating strategy was varied so as to enable evaluation of the effectiveness of various methods for reducing the length of the cold-start period. In this study, the fuel mixture used for the experiments contained several OME n with major percentages of n ¼ 3-6 (OME 3 : 58%, OME 4 : 29%, OME 5 : 10%, OME 6 : 2%).…”

Electrical promotion-assisted automotive exhaust catalyst: highly active and selective NO reduction to N2 at low-temperatures

“…6,7 However, the EHC method and plasmacatalyzed reaction require higher electric power consumption. 3,4,8,9 In addition, TWCs require high temperatures to achieve high purification performance. 10,11 We found from an earlier study that various catalytic reactions can proceed even at low temperatures when a DC electric field is applied to a semiconductor support.…”

On the emission reduction through the application of an electrically heated catalyst to a diesel vehicle

“…The diesel catalyst light‐off temperature is approximately 200°C; however, in reference the DOC inlet temperature was below 130°C for the majority of the first 400 seconds of the new European driving cycle (NEDC) from cold start. In Maus' results, the SCR took more than 1000 seconds to reach its light‐off temperature after cold start. The catalyst can operate inefficiently even during portions of the NEDC from warm start .…”

“…Compared with other methods, EHCs are promising solutions for decreasing engine cold start emissions, due to the heat injection flexibility and independence from engine operation. In reference, the three‐way catalyst (TWC) light‐off time dropped from 60 seconds to 15 seconds after adopting an EHC. In reference, a motorbike engine catalyst reached its light‐off temperature in 120 seconds through an EHC device with a 96 W heating power.…”