Abstract This paper focuses on the design and optimization of the crankshaft connecting rod mechanism in the light-duty truck engine. First, UG software was used to create three-dimensional models of major components (such as the crankshaft, connecting rods, and pistons), and ANSYS was employed for static stress and modal analysis. Through static stress analysis under various operating conditions, stress concentration issues at the main journal neck of the crankshaft and the connection between the connecting rod were identified, leading to an optimized design proposal. The modal analysis results show that the natural frequency of the crankshaft is relatively low, posing a certain risk of resonance, which needs attention in the design process. Based on the finite element analysis results, material selection and geometric shape optimization were conducted for each component, further enhancing their strength and reliability. The final analysis and optimization scheme provide theoretical support for the design of the crankshaft connecting rod mechanism and offer a basis for subsequent improvements in engine performance and noise control. This study proposes several effective optimization ideas and methods with significant practical application value.
Wang et al. (Tue,) studied this question.