插电式混动汽车多工况排放及能耗特性试验研究

Research on the Emissions and Energy Consumption Characteristics of Plug-In Hybrid Electric Vehicles under Various Operating Conditions

摘要: 为系统研究插电式混合动力汽车(PHEV)在不同行驶工况及环境条件下的排放与能耗特性，本文以某款国六插电式混动SUV为试验对象，设计了一套多维度工况测试矩阵开展测试。试验同步采集了WLTC与CLTC-P标准循环工况下的污染物排放量与能量消耗量，并计算单位里程CO₂排放强度。此外，针对急加速工况与低温冷启动工况，探究了动力电池大倍率放电与发动机高负载协同工作时的PM/NO_x排放峰值特性，并分析了低温冷启动工况下THC排放与暖风系统能耗特性。结果表明：WLTC工况下各污染物排放均低于CLTC-P，但能耗高于后者；急加速工况下，发动机峰值转速可达4138 r/min，并且PM和NO_x均会出现排放峰值；低温冷启动阶段前400 s的THC排放占测试循环总排放的80%以上。

Abstract: To systematically investigate the emission and energy consumption characteristics of a plug-in hybrid electric vehicle (PHEV) under different driving cycles and environmental conditions, this paper takes a China-VI compliant PHEV SUV as the test subject and designs a multi-dimensional operating condition test matrix for conducting experiments. During the tests, pollutant emissions and energy consumption are simultaneously collected under the WLTC and CLTC-P standard driving cycles, and the CO₂ emission intensity per kilometer is calculated. In addition, this study investigates the peak emission characteristics of PM and NO_x during high-rate discharge of the power battery and coordinated high-load engine operation under hard acceleration and low-temperature cold-start conditions, and analyzes the THC emissions and heating system energy consumption during low-temperature cold starts. The results show that under the WLTC cycle, all pollutant emissions are lower than those under the CLTC-P cycle, but energy consumption is higher. During hard acceleration, the engine peak speed can reach 4138 r/min, with both PM and NO_x exhibiting emission peaks. In the low-temperature cold-start phase, THC emissions within the first 400 seconds account for more than 80% of the total emissions over the test cycle.