Engine Overloads
使用本步骤对发动机过载状况进行故障诊断与排除，或在以下事件代码为现行状态时使用本步骤。
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| 事件代码 | ||
|---|---|---|
| 说明 | 激活代码的条件 | 系统响应 |
| E242（2）发动机过载 | 发动机负载已经超过触发点，延迟时间已经终止。 | 警报输出被激活。 系统将会记录该代码。 |
可能原因
- 进气歧管空气压力过高
- 燃气低热值（LHV）或燃气的比重明显地与编程值不同。
修理建议
检查进气歧管空气压力
当进气压力增加时，计算的发动机负载会增加。 当发动机带负载运转时，测量进气压力。 对于发动机的具体数据，请参考发动机的技术营销信息。
获取燃料分析并对燃料能含量进行编程
获取燃气分析以确定 LHV。 为 "Fuel Quality"（燃料质量）配置参数编程正确的 LHV。
如果燃料低热值（LHV）与编程到电子控制模块（ECM）中的 "Fuel Quality"（燃料质量）参数值不匹配，则选择屏幕左下角的 "Change"（更改）按钮将 "Fuel Quality"（燃料质量）参数的正确值编程到主 ECM 中。 输入正确值，然后选择 "OK"（确定）。
如果燃气质量不一致，则在一段时间内进行多次燃气质量分析。 将 "Fuel Quality"（燃料质量）配置参数编程为 LHV 的平均值。
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