不同测试循环下的制动鼓磨损排放研究

doi:10.19562/j.chinasae.qcgc.2025.02.010

Abstract

Abstract:

With the increasingly strict emission standards for automobiles， non-exhaust particulate matter emission， especially brake wear particulate matter emission， is becoming more prominent. In order to investigate the emission characteristics of brake wear particles under different test cycles， in this study a set of drum brakes is selected to conduct research on PM_2.5 and PN₁₀ emission under different test cycles （WLTP-Brake、WLTP、C-WTVC and CHTC-LT cycle） on a brake emission testing system modified based on a brake inertia table. The research results show that there are significant differences in the average initial/final braking temperature of the brake drum under different test cycles， and the highest final braking temperature generally occurs in the braking event corresponding to the maximum initial braking speed in the cycle. The PM_2.5 emission factor of the test brake drum under WLTP-Brake cycle is 1.67 mg/km/wheel （the Euro 7 vehicle emission limit of 7 mg/km/vehicle）， so the particulate matter emission control of the brake drum， like the brake disc， needs our attention. In addition， the initial braking speed of each cycle has a significantly greater impact on brake particle emission than braking characteristic parameters such as average braking deceleration. This study has practical reference value for the development and testing of low emission brakes for brake enterprises.

Key words: brake drum, particle emission, test cycle

Hongyuan Wei,Fengyue Bai,Chong Wang,Shan Wang,Fengbin Wang,Lin Zhang,Chunling Wu,Tianqiang Du,Xiaowei Wang,Xinfeng Zhang,Yao Ma,Peng Chang,Shoufeng Guo,Chunfu Jia,Junting Liu. Experimental Study on Wear Emission Under Different Test Cycles of Brake Drum[J].Automotive Engineering, 2025, 47(2): 301-308.

Figures/Tables 14

References 24

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参数	数值
主轴最大转速/（r·min^-1）	1 200
惯量范围/（kg·m²）	20～2 500
液压制动压力/MPa	≥20.6
液压提升速率/（MPa·s^-1）	≥70
气压制动压力/MPa	≥1.5
气压提升速率/（MPa·s^-1）	≥2
力矩传感器量程/（N·m）	0～35 000

参数	数值
温度调节范围/℃	15～25
温度控制精度/℃	±2
温度测量精度/℃	±1
湿度调节范围/%RH	40～60
湿度控制精度/%RH	±5
湿度测量精度/%RH	±2
冷却风速/（m·s^-1）	8～15
风速控制精度/（m·s^-1）	0.5
风量/（m³·h^-1）	100～1 000

参数	制动鼓
摩擦片材料	NAO
车辆类型	N2
车辆最高车速/（km·h^-1）	95
车辆满载质量/kg	3 660
汽车轴距/m	2 765
车轮滚动半径/mm	398.5
制动有效半径/mm	150
轮缸缸径/mm	28.58
轴荷分配比/%	50

参数	CHTC-LT 循环	C-WTVC 循环	WLTP-Brake 循环	WLTP 循环
循环总时长/s	1 652	1 800	15 826	1 800
循环总里程/km	15.88	20.51	192.2	23.3
循环平均车速/ （km·h^-1）	34.62	40.997	43.7	46.6
平均减速度/ （m·s^-2）	0.28	0.39	0.97	0.57
循环制动次数	35	33	303	48
平均制动事件次数/（次·km^-1）	2.20	1.61	1.58	2.06

制动事件号	制动初速度/（km·h^-1）	制动末速度/ （km·h^-1）	制动减速度/（m·s^-2）
106	98.37	0	1.822
136	105.19	90.39	1.028
171	96.93	73.28	0.821
233	104.98	95.39	0.888
290	111.98	56.11	1.724
295	132.49	34.0	1.824

Experimental Study on Wear Emission Under Different Test Cycles of Brake Drum

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References 24

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