A Study on the Improvement of NOx Reduction Efficiency for a Urea SCR System (First Report) -A Concept of NH<SUB>3</SUB> Adsorption Quantity Control and its Application with Transient Operation-

Yutaka Murata; Sadahito Tokui; Soichiro Watanabe; Kiyoto Takeshita; Yasuhiro Daisho; Hisakazu Suzuki; Hajime Ishii

doi:10.11351/jsaereview.30.19

Engine and Transmission

A Study on the Improvement of NOx Reduction Efficiency for a Urea SCR System (First Report)

-A Concept of NH₃ Adsorption Quantity Control and its Application with Transient Operation-

Yutaka Murata, Sadahito Tokui, Soichiro Watanabe, Kiyoto Takeshita, Yasuhiro Daisho, Hisakazu Suzuki, Hajime Ishii

Author information

JOURNAL RESTRICTED ACCESS

2009 Volume 30 Issue 1 Pages 19-26

DOI https://doi.org/10.11351/jsaereview.30.19

Details

Abstract

A urea SCR system was combined with a DPF system to reduce NOx and PM in a four-liter turbocharged intercooler diesel engine. Significant reduction in NOx was observed at low exhaust gas temperatures by increasing the NH₃ adsorption quantity in the SCR catalyst. Control logic of the NH₃ adsorption quantity for transient operation was developed based on the NH₃ adsorption characteristics in the SCR catalyst. It has been shown that NOx can be reduced by 75% at an average SCR inlet gas temperature of 158 deg C by adopting an NH₃ adsorption quantity control in the JE05 mode.

Corresponding author

Register with J-STAGE for free!