1车外噪声的有关国家标准及现状2004年底,对于国内汽车制造厂(包括工程机械改装车厂)来说,面临着一个如何降低汽车加速行驶时车外噪声的重大环保问题。因为早在2001年11月22日,国家就颁布了标准GB1495-2002《汽车加速行驶车外噪声限值及测量方法》,见表1。其中GVM表示最大总质? 1 Relevant national standards for noise outside the vehicle and the status quo At the end of 2004, for the domestic automobile manufacturers (including construction machinery refitting depots), faced with a major environmental problem of how to reduce the noise when the car accelerates. Because as early as November 22, 2001, the state promulgated the standard GB1495-2002 “car acceleration traveling outside noise limits and measurement methods,” Table 1. Where GVM represents the largest total mass?