CAJ | 학술논문

针对某轿车怠速车内噪声高达48 dB（A），比同类竞争车高5 dB（A），并且主观感觉存在共鸣音、严重影响乘坐舒适性的问题，利用噪声控制中的消元法识别噪声源。结果表明，由于管路内压力脉动过大，对管路产生了液压冲击而产生噪声，故该显著噪声的激励源为燃油供给管路。提出在靠近油轨处管路上设置蓄能器（缓冲罐）的措施来控制怠速车内噪声。采取措施后经驾乘人员主观评价，车内噪声消失，听觉感受明显改善。
침대모교차태속차내조성고체48 dB（A），비동류경쟁차고5 dB（A），병차주관감각존재공명음、엄중영향승좌서괄성적문제，이용조성공제중적소원법식별조성원。결과표명，유우관로내압력맥동과대，대관로산생료액압충격이산생조성，고해현저조성적격려원위연유공급관로。제출재고근유궤처관로상설치축능기（완충관）적조시래공제태속차내조성。채취조시후경가승인원주관평개，차내조성소실，은각감수명현개선。
The interior noise of a car is up to 48 dB(A)in idling, 5 dB(A)higher than competitive vehicles, and there are also resonance in subjective sensation and problems which adversely affect ride comfort. To eliminate these problems, we use the method of elimination of noise control to identify noise source and we find that, the noise is caused by hydraulic shock as a result of oversized pressure pulsation in the pipeline, therefore the excitation source of significant noise is fuel supply pipeline. It is proposed in the paper to set an accumulator (buffer tank) in a line near the oil track to control the interior noise of idle car, the subjective evaluation of occupants shows that the interior noise disappears, and their hearing feelings are improved significantly.