G3520B Industrial Engines Caterpillar


Fuel Pressure Problem

Usage:

G3520B GLF
使用本步骤诊断和排除燃油系统故障,或者在下列任一事件代码为现行状态时使用本步骤。 关于事件代码的信息,请参阅故障诊断与排除, "事件代码"。 必须进入 Caterpillar 电子技师(ET)上的发动机监控系统才能查看这些代码的当前触发点。 关于发动机监控系统的信息,请参阅故障诊断与排除, "发动机监控系统"。

表 1
事件代码 
代码和描述  激活代码的条件  系统响应 
E198(1) 燃油压力低  燃油压力已经降至编程延迟时间的触发点以下。  记录该代码。
警报输出被激活。 
E267(1)气体燃料压力高  燃油压力已超过编程延迟时间的触发点。 
E864(1)气体燃料压差低  燃油计量阀已报告阀上的压差已降到编程延迟时间的触发点以下。 
E865(1)气体燃料压差高  燃油计量阀已报告阀上的压差已超过编程延迟时间的触发点。 

可能原因

  • 气压不正确

  • 燃气压力调节器故障

建议的措施

气压不正确

使用 Cat ET 观察绝对燃油压力和燃油压差。 燃油计量阀需要压力调节至 105 至 135 kPa (15 至 20 psi) 的气体供应。

如果燃料压力不在可接受的范围内,则调整燃气压力调节器以获得正确的压力。 确认排放处于技术规格范围内。

燃气压力调节器故障

如果无法将燃气压力调节器调整到正确设置,请修理或更换调节器。

Caterpillar Information System:

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