Optimization Design Of Crank Connecting Rod Mechanism Of A Turbocharged Engine

In order to meet the requirements of the national environmental protection regulations, the automotive industry needs to further reduce emissions and energy consumption, for which domestic and foreign automobile man ufacturers are gradually developing a turbocharged gasoline engine. On the basis of the existing naturally aspirated engine platform for optimizing the design of the upgrade, the Matching Turbocharger to increase the performance of the engine, car manufact urers to design the supercharged engine convenient way and based on the existing production line were new engine design but also can greatly reduce the development cost.In this paper, based on the natural inspiration engine of a certain automobile group, the crank connecting rod mechanism is optimized to meet the requirement of the design of the booster engine. After optimization of crank and connecting rod mechanism first have a lightweight, compact, low friction, high strength and so on characteristics; at the same time ensure machine power, economy, reliability, durability, emission targets to meet the requirements of relevant laws and regulations and design. The pressurized condition as design input, on the basis of the model of crank and connecting rod mechanism of kinematics and dynamics analysis, and strength of the parts, check of the calculation of stiffness, reference calculation results confirm the optimization direction, and focus on the crank train of NVH optimization, crankshaft system torsional vibration and bending vibration analysis of three direction to consider upgrading the turbocharged engine with the original foundation models can be collinear production as the premise to determine the overall design scheme of the mechanism. Then in the part of the optimization design using one-dimensional strength check calculation and three-dimensional dynamic simulation calculation of the calculation, to determine the specific parts of the detailed optimization scheme.Through implementation, the formation of the crank linkage optimization design of the standard process, as well as the various stages of the process of delivery list, forming a crank mechanism of the independent research and development system. Laid the foundation for the independent devel opment of the follow-up models.