Bench Test Research on Ammonia Emission Characteristics of Heavy Duty Engines

ZHANG Fan; LI Ang; YU Jintao

doi:10.3969/j.issn.1001-2222.2019.01.008

Vehicle Engine ›› 2019, Vol. 0 ›› Issue (1) : 47-52. DOI: 10.3969/j.issn.1001-2222.2019.01.008

Bench Test Research on Ammonia Emission Characteristics of Heavy Duty Engines

ZHANG Fan,LI Ang,YU Jintao

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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.