某中重型商用车进排气系统噪声控制与优化

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中图分类号：U469 收稿日期：2025-12-25

DOI：10.19999/j.cnki.1004-0226.2026.04.003

Noise Control and Optimization of the Intake and Exhaust System for Medium- and Heavy-duty Commercial Vehicles

YuYoumingMin Lifei Du Weike Zhang YuxiangLi Ran Commercial Product R&D Institute，Dongfeng Automobile Co.，Ltd.，Wuhan 430057，China

Abstract：Withincreasinglystringentemissionregulationsandimproved powertrainnoisecontrol，theintakeandexhaustnoise controloftraditionalfuelmedium-andheavy-dutycommercialvehicleshasbecomemorechalenging.Thispaperpresentsfourengineringoptimizations tatsignificantlyreducevehiclenoise：（1）adinganexpansionchambertotheaircompresorintakepipeeliminates the“tooting”sound and reduces 170～300Hz noise at the air intake by 6.1 dB（A）.（2）integratinga Helmholtz resonator into the air intake pipe lowers idle noise by 2 dB（A）and reduces noise by 2～3dB（A） on average during gentle acceleration.（3）cutting the swirl vane to retain only one-third of its structure greatly attenuates 200～450Hz low-frequency noise during acceleration/deceleration， improvingsoundquality.（4）wrapping theidentifidwhistlesourcetheexhaustbelows—withsound-insulatingandabsorbingmaterialcompletely eliminates high-frequency airflowwhistle.

Key words：Expansion chamber;Helmholtz resonator;Swirl vane;Intake noise;ETV noise

1前言

随着全球排放法规日趋严格，以及消费者对驾乘舒适性要求的不断提高，中重型商用车的NVH性能已成为核心竞争力之一。（剩余3832字）