Engine valve cover mounted with BMC is reduced by 0.7 dB comparing with that mounted with cast aluminum.

 
  • 配裝壓鑄BMC復合材料和鑄鋁材料氣門(mén)室罩的2115型柴油機整機噪聲試驗也表明:用壓鑄BMC氣門(mén)室罩能降低整機A計權聲壓級噪聲0.;7 dB。
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