关键词: 重卡；进气噪声；降噪措施；NVH；舒适性

Abstract: According to the drumming sound in the driver's cab of a heavy truck in the conditions of under low load and within a specific speed range, firstly, this paper determines that the intake system is the source of noise transmission through subjective evaluation; then, the noise propagation path is locked by change evaluation; finally, combined with the experimental testing, noise reduction measures are proposed from different dimensions; finally, the comprehensive noise reduction measures of increasing the thickness of the intake flat tube, adjusting the stiffness of the rubber cushion at the connection between the intake flat tube and the body and attaching the damping plate are adopted to reduce the intake noise, and the actual vehicle verification is carried out. This paper solves the problem of excessive air intake noise in the vehicle, improves the quality of the vehicle, greatly improves the driving experience of the driver and passenger, provides a reference for the optimization design of vehicle noise, vibration, harshness (NVH) performance, and has practical guidance significance for the subsequent noise reduction work of the vehicle.

Key words: Heavy truck; Intake noise; Noise reduction measures; NVH; Comfortable