重型柴油车实际道路NO x 排放分析方法研究

doi:10.19562/j.chinasae.qcgc.2024.01.016

Abstract

Abstract:

PEMS is used to conduct the real-world emission tests on six typical China-VI diesel vehicles. Based on the work-based MAW （China and the EU）， NTE method （U.S. EPA） and 3B-MAW method （U.S. CARB）， the real-world NO _x emission characteristics of heavy diesel vehicles are studied， and the characteristics and applicability of different analysis methods are discussed. The results show that the NO _x emission results based on the work-based MAW method can meet the regulatory requirements of China and the EU， but the NO _x emission compliance based on the NTE method and 3B-MAW method is uncertain. The low utilization of NO _x emission data leads to the inability of NTE method to effectively analyze the real-world NO _x emission characteristics. And the 3B-MAW method is worthy of reference for NO _x emission classification management. Cold-start NO _x emission accounts for 47.3%-80.7% of the PEMS test， and the cold-start NO _x emission of heavy-duty diesel vehicles should be paid attention to. However， the current real-world NO _x emission analysis methods for heavy-duty vehicles in China， the EU and U.S. are unable to effectively evaluate cold-start NO _x emission. Therefore， the supervision of cold-start NO _x emission in the next stage of emission regulations should put forward the specific test cycle， analysis methods and emission limit， to effectively reduce the actual NO _x emission of heavy diesel vehicles.

Key words: heavy-duty diesel vehicles, real-world NO _x emission, NTE method, work-based MAW method, 3B-MAW method

Liqun Lyu, Long Xu, Hang Yin, Yang Yang, Yunshan Ge. Research on Real-World NO _x Emission Analysis Methods for Heavy-Duty Diesel Vehicles[J].Automotive Engineering, 2024, 46(1): 151-160.

Figures/Tables 16

窗口类型	标准化平均CO₂率/%	NO _x 限值
Idle-bin	≤6	$e S O S, I d l e$ ≤1.5×Idle限值
Low-bin	6~20	$e S O S, L o w$ ≤1.5×FTP LLC限值
M/H-bin	＞20	$e S O S, M / H$ ≤1.5×FTP/RMC限值

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试验车	V01&V02	V03	V04&V05	V06
燃油/进气	高压共轨/进气中冷
排量/L	7.8	9.5	10.5	12.5
额定功率/kW	235	289	316	412
最大转矩/（N·m）	1 309	2 062	2 200	2 814
行驶里程/km	300~2 500
生产年月	2020-06	2021-06	2020-09	2021-09
车辆类型	N₃	M₃	N₃	N₃
排放控制	EGR， DOC， DPF， SCR， ASC

Research on Real-World NO _x Emission Analysis Methods for Heavy-Duty Diesel Vehicles

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Research on Real-World NO x Emission Analysis Methods for Heavy-Duty Diesel Vehicles

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Research on Real-World NO _x Emission Analysis Methods for Heavy-Duty Diesel Vehicles