Study on Calibration Technique of Commercial Vehicles SCR System Based on MAP Diagram

Yao, Guang Tao; Deng, Cheng; Zi, Xin Yun; Pang, Hai Long; Guo, Zi Rong

doi:10.4028/www.scientific.net/amm.229-231.2643

Cited by 1 publication

(1 citation statement)

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“…In the early stage, map-based control is widely used in the engineering. In [3], a calibrated MAP diagram have been proved that it can effectively reduce emissions of diesel if used in the control system. While the map-based control algorithm cannot estimate 3 absorbed on the catalyst.…”

Section: Introductionmentioning

confidence: 99%

Design of selective catalytic reduction systems controller for diesel engine using triple-step nonlinear method

Chen

Zhao

et al. 2014

Proceeding of the 11th World Congress on Intelligent Control and Automation

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Urea selective catalytic reduction (Urea-SCR) is well known for exhaust gas aftertreatment in diesel engines. In this paper, for simultaneously achieving high conversion efficiency and low ammonia slip, a ammonia storage controller is designed to track the desired coverage ratio along the axial direction of a SCR catalyst using the triple-step method. Different from the existing nonlinear controller design methods, the design procedure is formalized as a triple-step deduction, and the derived controller consists of 3 parts: steady-statelike control, feedforwad control based on reference dynamics, and statedependent feedback control. Simulations based on ECE driving cycle in the enDYNA diesel model are conducted to evaluate the effectiveness of the proposed control strategy. Furthermore, comparisons with PID controller are presented to show the advantage of the proposed triple-step method SCR control strategy.Index Terms-Selective catalytic reduction (SCR), ammonia distribution, enDYNA, diesel engines, triple-step method, nonlinear control.

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Section: Introductionmentioning

confidence: 99%