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本文分析了传统汽车理论中关于动力性和燃料经济性的各种评价指标的不足,把汽车—乘员—地面环境作为一个系统考虑,使车辆本身的极限能力和实际使用的环境条件结合起来,提出了能够反映实际使用效果的动力性、燃料经济性的综合评价指标—单位使用小时平均车辆地面系统效率。据此,探讨了汽车发动机、传动系、轮胎、地面与使用工况的动力性、燃料经济性最佳匹配。本文叙述了最佳匹配的概念和确定方法,并通过BJ—212汽车砂地行驶试验,表明轮胎气压对车辆地面系统效率有显著影响,从一个侧面表明了研究最佳匹配问题的实际意义。
This paper analyzes the deficiency of various evaluation indexes about the power and fuel economy in the traditional automobile theory. Taking the vehicle-occupant-ground environment as a system consideration, the ultimate capacity of the vehicle is combined with the actual environmental conditions, Comprehensive evaluation index of power and fuel economy that can reflect the actual use effect - Average hourly average vehicle ground system efficiency. Accordingly, the discussion of the car engine, drivetrain, tires, ground and the use of power, fuel economy best match. This paper describes the concept and method of the best match, and through the BJ-212 vehicle sand driving test, shows that the tire pressure has a significant impact on the efficiency of the vehicle ground system, indicating the practical significance of studying the best matching problem from one aspect.