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一、噪声观察重庆JT50型摩托车的噪声,最初是在对制动性能进行道路试验时,发现个别车辆有嘎、嘎、嘎……的啸叫声。后来发啸叫声的车辆比例逐步增加,到1983年4月间,产品中有上千辆摩托车在制动时都发啸叫声,这就严重地影响了产品质量和名声。在随后的半年多中,在装配和道路试验中,经反复观察、分析,得出初步结论,认为摩托车制动噪声的发生是由于制动蹄不能完全抱紧制动鼓,产生了滑动摩擦,制动蹄和制动鼓作微幅振动所致,同时制动距离延长,且无制动拖印。
First, the noise observed Chongqing JT50 motorcycle noise, the first test of the braking performance of the road test, found that individual vehicles have Ga, Ga, Ga ... ... howling. Later, the proportion of vehicles whistling gradually increased, to April 1983, the product has thousands of motorcycle whistling when braking, which seriously affected the product quality and reputation. In the subsequent more than six months, in the assembly and road test, after repeated observations and analysis, reached preliminary conclusions that the motorcycle brake noise occurs because the brake shoes can not completely hold the brake drum, resulting in sliding friction , Brake shoes and brake drum for minor vibration caused by the extension of the braking distance, and no brake printing.