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旧 Nov 30th, 2012, 03:18     #1
uwatchinasmile
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默认 10年车启动半小时内躁音特别大

2002年的FORD FOCUS SE, SPI ENGINE
近一年来,不管天冷还是不冷,启动后的半个小时之内,坐在车内都感觉噪声特别大,一加油门噪音明显加大还能感觉到玻璃(包括后视镜)的震动,但是多运转一段时间后,噪音就小下来了。
不知为什么请教大侠,谢谢!

随波逐流
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旧 Nov 30th, 2012, 03:58   只看该作者   #2
annarosa
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默认

共振吧
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旧 Nov 30th, 2012, 14:55   只看该作者   #3
reuben313
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默认 冷车的时候,汽油气化困难一点

为了保持动力,你的油门就会踩得大,当然发动机转速也高,噪音也高了。

至于震动,可能还是与喷油雾化不好有关,也可能火花塞点火也不好,造成某缸输出功率欠好,从而造成震动。

热车后,每缸都燃烧完全,同样的速度,你需要更小的油门,发动机转速也更低;同时自动变速箱在冷的时候,变矩器不能锁定,传动效率低于100%,也会造成发动机需要更高的转速。

等温度上去后,变矩器锁定后传动效率有100%,同时燃烧更完全,噪音就小了。

又是新年
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旧 Nov 30th, 2012, 15:19   只看该作者   #4
jetman
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默认

排气管漏了。
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旧 Dec 10th, 2012, 11:27   只看该作者   #5
uwatchinasmile
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默认

谢谢楼上各位大侠
这周去修车处查一查昰不是严重问题
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