3500B Engines for 776D, 777D, 784C, 785C, 789C and 793C Off-Highway Trucks Caterpillar


Boost Pressure Above Normal

Usage:

785C 1HW
使用此程序可对增压过高或以下事件代码进行故障诊断和排除。 有关事件代码的具体触发点信息,请参考故障诊断和排除, "事件代码列表"。

表 1
事件代码    
说明     产生此代码的情况     系统响应    
E092 增压压力高于正常值     实际增压压力高于所需增压压力。     记录此代码,且此代码处于当前状态。    

可能的原因

  • 废气门膜片泄漏

  • 供气

  • 满负荷油量设置 (FLS) 有误

建议措施

废气门膜片泄漏

确认废气门的排气旁通阀能够打开。 使用卡特彼勒电子技师(ET)将废气门设为完全打开。 进行变矩器失速测试。 30 秒后,应该会出现增压过低事件。 如果发生增压过低事件,则说明废气门可正常开启。

供气

确认废气门控制阀的供气不低于 345 千帕 (50 磅/平方英尺)。

FLS 有误

确保 FLS 正确。

Caterpillar Information System:

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