辛运 谢伟忠 罗泽敏
摘 要:轮胎是车辆与地面接触的唯一部件,汽车轮胎气压的高低,将直接影响到整车行驶的舒适性、安全性以及燃油经济性等整车综合性能。在保证整车操纵稳定性、舒适性的同时,适当的提高轮胎胎压,将有利于整车阻力降低,进而降低整车油耗、电耗,以应对工信部越来越收紧的乘用车平均油耗目标。文章通过不同轮胎气压的整车性能实车试验,分析了轮胎气压变化对整车性能的影响。关键词:轮胎;气压;整车性能;实车试验中图分类号:U467 文献标识码:B 文章编号:1671-7988(2019)01-82-03
Effect of Tire Pressure on Vehicle Performance
Xin Yun, Xie Weizhong, Luo Zemin
( The Automotive Engineering Institute of Guangzhou Automobile Group Co., Ltd., Guangdong Guangzhou 511434 )
Abstract: Tire is the only part of vehicle contact with the ground. The tire pressure will directly affect the vehicle's comfort, safety, fuel economy and other comprehensive performance. While guaranteeing the handling stability and comfort of the vehicle, properly increasing the tire pressure will help reduce the vehicle resistance, thereby reducing the vehicle fuel consumption and power consumption, in order to cope with the tightening average fuel consumption of passenger vehicles by the Ministry of Industry and Information Technology. In this paper, the influence of tire pressure on vehicle performance is analyzed through vehicle performance test with different tire pressure.Keywords: Tire; Air pressure; Vehicle performance; Real car testCLC NO.: U467 Document Code: B Article ID: 1671-7988(2019)01-82-03
1 序言
輪胎是整车与地面直接接触的部件,对整车的动力性和经济性、行驶平顺性、操纵稳定性、制动性能等有直接的联系。在车型研发过程中,首先根据车型的定位、车重、轮胎尺寸等要求设定整车胎压,在确定车型胎压后,再进行后续的轮胎选型以及与轮胎相关的各项验证试验,因此车型开发初期的胎压设定显得尤为重要。在整车开发过程中,如何设定轮胎胎压,使其既能满足整车性能的要求,又能和车型定位相匹配,需要进行大量的研究。本文结合整车各性能对轮胎气压的要求,通过试验验证了轮胎气压对整车性能的影响。
2 对标车分析
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车型开发过程中,对标车分析是及其重要的环节,因此本文对市场上的主流车型的轮胎胎压作了大量分析统计,如图1所示,可以看出市场上主流车型的轮胎气压多在220kPa-250kPa之间,占到所有统计车型的79%以上。对于新能源车型因其车重较重,胎压通常设置为250kPa以上。……