3524B Engines for Off-Highway Trucks Caterpillar


Poor Fuel Consumption

Usage:

3524B 1AW

可能的原因

  • 发动机转速/正时传感器

  • 电气连接器

  • 喷油器

  • 燃油供给

  • 进气堵塞

  • 排气堵塞

  • 附属设备

建议措施

发动机转速/正时传感器

如果 CID-FMI 261-13 “需要进行发动机正时校准”诊断代码处于当前状态,请检查发动机转速/正时传感器的校准情况。 请参考故障诊断和排除, "发动机转速/正时传感器 - 校准"部分的校准程序。

电气连接器

检查电子控制模块(ECM)的连接器 J1/P1 和/或 J2/P2 是否正确安装。. 检查相应的喷油器连接器是否正确安装。 修理和/或更换连接器。 请参考故障诊断和排除, "检查电气连接器"部分的诊断功能测试。

喷油器

检查有无与喷油器回路有关的当前诊断代码。 确定输入了喷油器调整代码。 进行"喷油器电磁阀测试"。 确认 ECM 向所有喷油器电磁阀励磁。 请参考故障诊断和排除, "喷油器电磁阀"部分的诊断功能测试。

燃油供给

检查油箱中的燃油油位。 确保有足够的燃油可供使用。

检查燃油管线有无以下问题: 堵塞, 弯折 和 管路挤压. 修理或更换管路。

  1. 检查油箱中有无会阻塞供油的异物。 检查燃油泵的吸油管路是否有空气渗入。 执行以下步骤后向燃油系统充油:

    • 更换燃油滤清器

    • 维护低压供油油路

    • 更换喷油器

  2. 低温天气会对燃油特性造成不良影响。 有关改善低温操作条件下燃油特性的信息,请参考操作和保养手册。

  3. 在发动机盘动过程中检查燃油压力。 检查燃油经过滤清器后的压力。 有关正确的压力值,请参考系统操作/测试和调整手册。 如果燃油压力低,请更换燃油滤清器。 如果更换后燃油压力仍然偏低,请检查以下各项: 输油泵, 输油泵的连接 和 燃油压力调节阀.

进气堵塞

检查发动机空气滤清器。 更换堵塞的空气滤清器和/或清洁滤清器。 检查进气系统有无堵塞和漏气。

排气堵塞

检查排气系统有无堵塞和漏气。

附属设备

检查连接的附属设备。 确保附属设备不会使发动机超负荷。

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