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首页> 外文期刊>International Journal of Marine Engineering Innovation and Research >Air Flow and Camshaft Stress Analysis of Variable Valve Lift Gas Engine
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Air Flow and Camshaft Stress Analysis of Variable Valve Lift Gas Engine

机译：可变阀提升燃气发动机的气流和凸轮轴应力分析

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The use of variable valve lift technology on diesel gas engine has been able to increase power without having to change the dimensions of the engine. However, in-depth analysis of how the flows that occur when air enters and stress that occurs in camshaft of the gas engine needs to be studied more deeply. Simulation Analysis incoming airflow and stress on the gas engine camshaft variable valve lift types expected to describe the effect of the use of valve lift on the gas engine. In this simulation experiments using Computational Fluid Dynamics (CFD) approach and structural stress with variable valve opening on the condition of default by 11.1 mm, openings increased by 16.65 mm or 1.5 times, 2 times by 22.205 mm, and 2.5 times by 27.7 mm. Where the results of the simulation showed that the condition of the valve from 11.1 mm to 22.205 mm increased the average air velocity and mass flow rate, while at the opening valve 27.7 mm decreased average speed. The resulting stress value of the valve 11.1 mm to 27.7 mm continues to increase due to the force created in the spring getting into the valve then increasing the force on the spring.
机译：在柴油机发动机上使用可变阀升程技术已经能够提高功耗，而无需改变发动机的尺寸。然而，对在燃气发动机凸轮轴中发生的空气进入和应力时，对气流的流动的深入分析需要更深入地研究。仿真分析进入气流和燃气发动机凸轮轴可变阀提升类型的压力，预计将描述阀门升程在燃气发动机上的效果。在该模拟实验中，使用计算流体动力学（CFD）方法和具有可变阀门开口的结构应力，在默认情况下，开口增加16.65毫米或1.5倍，2倍乘22.205 mm，2.5倍，2.5倍。在模拟结果的情况下，阀门的条件从11.1mm到22.205mm增加到平均空气速度和质量流量，而在开口阀27mm处的平均速度降低。由于在弹簧中产生的力进入阀门，因此阀11.1mm至27.7mm的所得到的应力值继续增加，然后在弹簧上增加力。

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