Abstract: Very few works on sound quality research of automobile’s throttle can be found in our Country. In this paper, mechanism analysis and control method of throttle’s flow noise are elaborated in combination with a practical engineering case in automobile development. By optimizing the EFI match, adding deflector and improving sound package acoustic insulation performance, the throttle’s sound quality, when the vehicle is accelerating or rapid braking, is significantly improved. And the product market risk of the user’s complaints is greatly reduced. At the same time, influence of improvement of the throttle’s sound quality on the external characteristics of powertrain is analyzed. This work may be helpful for further study of the throttle’s flow noise and the transient NVH performance.

Key words: acoustics, throttle, flow noise, sound quality

摘要： 重点论述轿车节气门啸叫的机理分析及控制方法，并结合某轿车开发中的实际工程案例进行较全面地阐述。通过优化电喷匹配、增加导流板和提升声学包装隔声性能等措施或方法，显著提高该轿车在急踩油门时节气门的声品质，改善整车的加速噪声品质，大大降低产品的市场用户投诉风险，并且对涉及动力总成外特性等的影响进行比较验证。本文将有助于提高国内汽车工业界对轿车节气门啸叫等瞬态NVH性能研究的认识水平和开发能力。

关键词: 声学, 节气门, 啸叫, 声品质