柴油机设计与制造
柴油機設計與製造
시유궤설계여제조
DESIGN & MANUFACTURE OF DIESEL ENGINE
2014年
4期
28-32
,共5页
皮卡车%异响%试验%排气系统 NVH
皮卡車%異響%試驗%排氣繫統 NVH
피잡차%이향%시험%배기계통 NVH
pickup truck%abnormal noise%test%exhaust system%NVH
通过对一辆皮卡车空载异响问题的发现、排查、根源确定，阐述了一般异响问题的解决思路。该皮卡整车空载加速和空载定置3500 r/min时，有4800 Hz左右的哨音异响。整车上发动机本体也无此振动频率。从发动机本体、增压器、排气系统入手，经过一系列测试，最终发现了问题产生的根源。
通過對一輛皮卡車空載異響問題的髮現、排查、根源確定，闡述瞭一般異響問題的解決思路。該皮卡整車空載加速和空載定置3500 r/min時，有4800 Hz左右的哨音異響。整車上髮動機本體也無此振動頻率。從髮動機本體、增壓器、排氣繫統入手，經過一繫列測試，最終髮現瞭問題產生的根源。
통과대일량피잡차공재이향문제적발현、배사、근원학정，천술료일반이향문제적해결사로。해피잡정차공재가속화공재정치3500 r/min시，유4800 Hz좌우적초음이향。정차상발동궤본체야무차진동빈솔。종발동궤본체、증압기、배기계통입수，경과일계렬측시，최종발현료문제산생적근원。
A general method to solve NVH problem especially abnormal noise is presented by the investigation of abnormal noise of a pickup vehicle running in idling condition. One kind of whistle noise of frequency of 4800 Hz was found at 3500 r/min withoutload. Such frequency noise was notfound in engine body. Itwas after many measurements and tests were made to engine body, turbocharger and exhaustsystem thatthe rootcause of the abnormal noise was discovered.
