Vehicle noise has reduced over the years due to the customer demand for quieter vehicles. As the background noises such as combustion noise, pumping noise, etc. have reduced, mechanical noises such as gear noise have become prominent and a major cause of customer complaints. Engine timing gear train uses gears for transferring torque to cam and accessory gears. As engines have become quieter by efforts to reduce the combustion noise, as well as, by moving away from mechanical fuel pumps to common rail fuel pumps, the gear train noise has come under increased scrutiny. Gear whine could be a result of multiple factors. Gear profile distortion is one of the factors. Gear torque variation also has a significant effect on gear whine. Operation of the accessory drives such as hydraulic pumps under variable loads and speeds, is one of the major challenges for resolving a gear whine issue in the engine gear train. ISO 10064 provides guidance on the distortion due to temperature effects, but there is not much published literature about gear whine due to distortion. The work attempts to fill that gap by describing a gear whine problem due to profile distortion and load change and its resolution by changing the gear design.
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机译：由于客户对更安静的车辆的需求，车辆噪音随着客户的需求而降低。作为诸如燃烧噪声，泵送噪声等的背景噪声减少，诸如齿轮噪声之类的机械噪声已经突出和客户投诉的主要原因。发动机时序齿轮系使用齿轮，用于将扭矩传递到凸轮和配件齿轮。由于发动机通过努力降低燃烧噪声而变得更安静，并且通过远离机械燃料泵到共轨燃料泵，齿轮系噪声增加了仔细扫描。齿轮呜呜声可能是多种因素的结果。齿轮轮廓失真是其中一个因素。齿轮扭矩变化也对齿轮凸起具有显着影响。在可变负载和速度下的液压泵等辅助驱动器的操作是解决发动机齿轮系中的齿轮呼头问题的主要挑战之一。 ISO 10064提供了由于温度效应引起的扭曲的指导，但由于变形导致的齿轮呜呜声并未出现许多文献。通过描述轮廓失真和负载变化及其分辨率，通过改变齿轮设计来通过描述由于轮廓失真和负载变化及其分辨率来填充该间隙来填充该差距。
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