基于远程监控数据的专用汽车 NO_x 排放特征分析

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中图分类号：U464.1 收稿日期：2025-11-22 DOI：10.19999/j.cnki.1004-0226.2026.04.018

Research on NOx Emission Characteristics of Heavy-duty Special Purpose Vehicles in the Real-world Application

Ge Zihaol Chen Weicheng² Ji Zhe²Yin Hang² Lyu Liqunl Huang Ying1 1.School ofMechanical Engineering，Beijing Institute of Technology，Beijing 10o081，China 2.Chinese Research Academy of Environmental Science，Beijing 10oo12，China

Abstract：This paper obtained the working conditions，including vehicle speed and engine powers，and NOx emission characteristicsinthereal-worldapplicatiosofspecialpurposevehiclesicludingconcretepumptrucks，concretemixertrucks，ndcrane trucks basedonremote-monitoredemisionbigdatafromChina-6eavydutyvehicle.Resultsshowedthattheworkingconditionsinterealworldappicationsofspecialpurposevehiclescanbeseparatedintotwocompletelydiferentworkingconditions：roaddrivingand working.Workingcan have occupanciesof over 75% forspecial purpose vehicles.For heavy-duty special purpose vehicles.In road driving，theloadsofspecialpurposevicleswererelativelylargeandtheexhaustemperaturescanensuretheefectiveworkingofselective catalytic reduction（SCR）systems. NOx emissions can be effectively reduced，the requirements in emission regulations can be achieved.However，inworking，theengine loads were low，andthe inlet temperatures ofSCR systemscan drop to 150～160∘C or even lower，failing tomeetthe working requirementsof SCRcatalysts，leading to significantly increased NOx emissions exceeding the limitationintheemissonregulationsinreal-worldworking.Duetotheocupanciesofworkingtimebeingconsiderablyhigherthanthatof roaddrivingtie，specialemisionrequirementsshouldbeintroducedtoreduetheemissonsintheworkingofspecialpurposevehicles and regulate the real-world emissions of special purpose vehicles more effectively.

Keywords：Special purposevehicles;Workingcharacteristics; NOx emissions

1前言

针对重型柴油车的污染物和燃油消耗量，我国分别颁布和实施了不断加严的污染物和油耗限值标准。（剩余7304字）