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为了满足货运长远需要，铁路需要有能稳定实现约0．26～0.27牵引系数的机车。文中就提高牵引系数问题进行了分析研究，认为机车增大牵引系数能发挥很大的牵引经济潜力，但也会带来一些消极影响。为了保持高的牵引系数而又能排除所带来的消极影响，提出了一些解决的办法：改进走行部分、牵引力调节系统以及防止、发现和抑制打滑系统的结构和优化参数，增设增重装置，提高牵引力实现过程的稳定性，改善牵引性能，从而把现有内燃机车牵引系数增大15％～20％，远景内燃机车增大到0．26～0．27。
In order to meet the long-term needs of freight transport, railways need locomotives that can stably implement a traction coefficient of about 0.26 to 0.27. The paper analyzes the problem of increasing the traction coefficient, and thinks that increasing the traction coefficient of the locomotive can exert great traction economic potential, but it will also bring some negative effects. In order to maintain a high traction coefficient and to eliminate the negative effects brought by it, some solutions are proposed to improve the running part, the traction control system and prevent, detect and restrain the structure and optimization parameters of the slipping system, Improve the stability of the traction process and improve the traction performance, thereby increasing the traction coefficient of existing diesel locomotives by 15% to 20% and the long-range diesel locomotives increasing to 0.26 to 0.27.