越野车复合型悬架平顺性的研究

doi:10.19562/j.chinasae.qcgc.2022.01.013

Abstract

Abstract:

In order to solve the problem of poor ride comfort of off-road vehicle on complex roads， an air spring is added on the original suspension of an off-road vehicle to form a novel compound suspension structure in this paper. Firstly， for exploring the vibration mechanism of the suspension system of off-road vehicle， through the idealized structure analysis on the air spring and the original suspension system， a compound suspension system model incorporating air spring and coil spring in parallel is constructed. Then， according to the driving requirements of off-road vehicles， a new control strategy for switching working mode is proposed with its effectiveness verified and the control system of compound suspension improved. Finally， taking the complex road surface as the working condition of the compound suspension， with the vertical acceleration of vehicle body， the dynamic travel of suspension and the dynamic deformation of tire as evaluation indicators， the influences of the complex road surface on the ride comfort and road friendliness of the compound suspension are analyzed. The results show that with complex road surface， the off-road vehicle with compound suspension system has better ride comfort than that with traditional suspension， and the wear and tear problem of air spring in normal driving is also effectively solved.

Key words: off-road vehicles, compound suspension system, ride comfort, working mode switching control strategy

Wen Sun,Chenyang Li,Junnian Wang,Haozhe Qian,Wentong Zhang. Research on Ride Comfort of an Off-road Vehicle with Compound Suspension[J].Automotive Engineering, 2022, 44(1): 105-114.

Figures/Tables 19

路面等级	A	B	C	D	E
路面不平度系数 $G (n 0)$	16	64	256	1 024	4 096

工况	悬架类型	车身垂向加速度均方根值/（ $m ? s - 2$ ）	性能改善/ $%$	悬架动行程/ $m$	性能改善/ $%$	轮胎动变形/ $m$	性能改善/ $%$
40 km/h	传统悬架	1.068 7	39.76	0.004 5	48.88	0.003 0	40.00
40 km/h	复合型悬架	0.643 5	39.76	0.002 3	48.88	0.001 8	40.00
60 km/h	传统悬架	1.306 0	39.81	0.005 5	49.09	0.003 7	40.54
60 km/h	复合型悬架	0.786 0	39.81	0.002 8	49.09	0.002 2	40.54
80 km/h	传统悬架	1.504 2	39.95	0.006 3	49.21	0.004 3	41.86
80 km/h	复合型悬架	0.903 2	39.95	0.003 2	49.21	0.002 5	41.86

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名称	单位	参数
多变指数		1.33
弹簧有效面积	m²	0.038 1
有效面积变化率		0.018 6
有效容积	m³	0.007 8
有效容积变化率		0.059

名称	原始参数	现参数
簧载质量/kg	1 555	1 555
非簧载质量/kg	125	145
阻尼系数/（N·m^-1）	45 000	45 000
轮胎刚度/（N·m^-1）	592 000	592 000
弹簧刚度/（N·m^-1）	162 000

路面等级		A	B	C	D	E
加权加速度均方根值	40 km/h	0.116 5	0.232 8	0.465 0	0.927 8	1.847
	60 km/h	0.143 1	0.286 0	0.571 2	1.139 0	2.265
	80 km/h	0.165 1	0.329 9	0.658 7	1.313 0	2.613

Research on Ride Comfort of an Off-road Vehicle with Compound Suspension

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Figures/Tables 19

References 31

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