重型发动机氨排放特性的台架试验研究

张凡; 李昂; 于津涛

doi:10.3969/j.issn.1001-2222.2019.01.008

车用发动机 >

2019 , Vol. 0 >Issue 1: 47 - 52

DOI: https://doi.org/10.3969/j.issn.1001-2222.2019.01.008

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重型发动机氨排放特性的台架试验研究

张凡 ,
李昂 ,
于津涛

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（中国汽车技术研究中心有限公司，天津 300300）

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Bench Test Research on Ammonia Emission Characteristics of Heavy Duty Engines

ZHANG Fan ,
LI Ang ,
YU Jintao

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(China Automotive Technology and Research Center Co.,Ltd.,Tianjin 300300,China)

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摘要

在发动机台架上进行了ESC、ETC和WHTC循环的排放测试，使用可调谐激光二极管气体分析仪测量了10台重型发动机催化器后的氨排放水平。研究结果表明，以理论空燃比燃烧的气体机在WHTC循环三效催化器达到起燃温度后有氨排放产生，市郊工况中的高速加浓工况有助于氨排放的产生。对于使用SCR技术的柴油机，其氨排放与NO_x排放是互逆的，柴油机的氨排放水平远低于NO_x排放。柴油机在冷态WHTC循环的氨排放低于热态，氨排放峰值出现在市郊工况。

关键词： 重型发动机; 氨排放; 台架试验; 排放测量

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张凡 , 李昂 , 于津涛 . 重型发动机氨排放特性的台架试验研究[J]. 车用发动机, 2019 , 0(1) : 47 -52 . DOI: 10.3969/j.issn.1001-2222.2019.01.008

Abstract

ESC, ETC and WHTC cycle emission tests were carried out on the engine test bench. The ammonia emissions of 10 heavyduty engines at the exit of catalyst were measured through the tunable diode laser gas analyzer. The results show that the gas engines running with the theoretical airfuel ratio produce the ammonia emissions in WHTC cycle when the lightoff temperature of threeway catalytic converter is available. The suburb condition marked with high speed and rich fuel characteristics is helpful to the formation of ammonia emissions.For diesel engine with SCR, the ammonia and NO_x emissions are mutually inverse and the ammonia emissions are far lower than NO_x emissions. The ammonia emission from diesel engine in cold WHTC cycle is lower than that in hot conditions. The peak of ammonia emission appears in the suburb conditions.

Key words： heavy-duty engine; ammonia emission; bench test; emission measurement

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