E025 High Inlet Air Temperature Derate
产生此代码的情况:
进气温度超过触发水平。
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| 触发水平 | 设定点(秒) | 复位水平 | 复位时间 |
79 °C (174 °F) |
0 至 120 秒钟 | 77 °C (171 °F) |
20 秒钟 |
系统响应:
当活动"减额(Derate)"出现时，报警灯将闪烁。
发动机功率按照表2进行减额。
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| 温度 | 减额变化斜率 | 最大减额度 |
|---|---|---|
| < 80 °C (176 °F) |
每秒1.0 % | 3.0% |
81 °C (178 °F) |
6.0% | |
82 °C (180 °F) |
9.0% | |
83 °C (181 °F) |
12.0% | |
84 °C (183 °F) |
15.0% | |
85 °C (185 °F) |
18.0% | |
| > 86 °C (187 °F) |
20.0% |
- 后冷器可能有故障。
测试步骤 1. 检查有无诊断编码
- 将卡特彼勒电子维修工具(ET)连接到维修工具接头上。
- 将发动机控制置于通电(ON)模式。 发动机应处于停机状态。
- 检查有无任何活动或记录诊断编码。
预期结果:
应没有任何诊断编码出现。
结果:
- 与预期结果一致 - 进行步骤2。
- 与预期结果不符 -
修复: 修理出现的诊断编码。 请参阅本手册"有故障编码出现时的故障诊断与排除"部分中的适当专题。确保修理后故障被排除。
停止
测试步骤 2. 对后冷器进行检查
- 对后冷器进行检查。 有关可能的起因，请参阅测试与调整中的适当专题。
预期结果:
后冷器没有问题。
结果:
- 与预期结果一致 - 可能存在间歇性故障。
修复: 监视发动机的操作。修理故障。确保修理后故障被排除。
停止
- 与预期结果不符 -
修复: 修理故障。确保修理后故障被排除。
停止
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