本文以内燃机-汽车联合工作特性为依据,考察分析现有内燃机主要论著中关于外特性曲线的评价指标和方法,或多或少存在概念不清,数值不唯一,相互联系不明确的问题。以提高整体动力性能为基本前提,提出一组新的评价指标及方法。这一组基本性能指标具有物理概念明确,测量或计算方便,数值具有唯一性的特点。 Based on the characteristics of the internal combustion engine-vehicle joint work, this paper investigates and analyzes the evaluation indexes and methods about the external characteristic curve in the main works of the existing internal combustion engine, more or less the problems of unclear concepts, non-uniform values ​​and unclear interrelationships. In order to improve the overall dynamic performance of the basic premise, put forward a new set of evaluation indicators and methods. This set of basic performance indicators with a clear physical concept, measurement or calculation is convenient, the value of the unique characteristics.