CAJ | 학술논문

以某自主品牌乘用车怠速车内噪声为研究对象，通过动力总成悬置系统隔振率试验、车内噪声分离试验等方法定量确定车内各噪声源的贡献量大小，并从排气管口噪声源控制、悬置垫结构传递路径控制及防火墙隔音垫空气传递路径控制等方面分别提出怠速车内噪声控制的改进措施。采取改进措施后的试验样车怠速工况下车内噪声降低3.5dB（A），达到国内合资品牌水平。
이모자주품패승용차태속차내조성위연구대상，통과동력총성현치계통격진솔시험、차내조성분리시험등방법정량학정차내각조성원적공헌량대소，병종배기관구조성원공제、현치점결구전체로경공제급방화장격음점공기전체로경공제등방면분별제출태속차내조성공제적개진조시。채취개진조시후적시험양차태속공황하차내조성강저3.5dB（A），체도국내합자품패수평。
In this paper, a car model of domestic brand is taken as research object to investigate the interior noise control in idling. The vibration isolation test of engine mounts and interior noises separation test, etc., are carried out to quantify contribution of different interior noise sources. Measures to improve interior noise control in idling are presented in this paper including control of noise source at exhaust outlet, control of suspension cushion structure transfer path, and control of air transfer path of firewall and sound-proof pad. With such modifications, the test car reduces its interior noise by 3.5 dB (A) in idling, which enables its noise level in line with that the noise level of Sino-foreign joint venture car products.