C15 Petroleum Generator Set Engines Caterpillar


Electronic Control System Components

Usage:

C15 115


图 1g01300193
左视图(典型示例)
(1) 进气歧管压力传感器
(2) 进气温度传感器
(3) 电子控制模块(ECM)
(4) 辅助转速/正时传感器
(5) 大气压力传感器
(6) 发动机机油压力传感器


图 2g01075143
前视图(典型示例)
(7) 发动机冷却液温度传感器
(8) 主转速/正时传感器


图 3g01075146
顶视图(典型示例)
(9) 燃油压力传感器
(10) 燃油温度传感器


图 4g01076713
左视图(典型示例)
(11) 冷却液液位传感器

电子控制系统被集成设计到发动机的燃油系统和进排气系统中,以便对喷油量和喷油正时进行电子控制。 与传统的机械发动机相比,电子控制系统可提供增强的正时控制和空燃比控制。 喷油正时通过对喷油器点火时间的精确控制实现,而发动机转速通过调整喷油持续时间控制。 电子控制模块(ECM)通电激励单体喷油器内的电磁阀以便开始喷油。 同样,ECM 对单体喷油器断电以便停止喷油。 有关喷油过程的全面的解释,请参阅系统操作, "燃油系统"专题。

发动机使用以下几种类型的电子部件:

  • 输入

  • 控制

  • 输出

输入部件是向 ECM 传送电信号的部件。 传送的信号以下列方式之一变化:

  • 电压

  • 频率

  • 脉冲宽度

信号响应机组的某些特定系统的变化而变化。 ECM 把输入的传感器信号视作有关机组的状况、环境或运行的信息。

控制部件 (ECM) 接收输入信号。 控制部件内的电子电路对来自输入部件的信号进行评估。 这些电子电路也向系统的输出部件提供电能。 向输出部件提供的电能基于输入信号值的预设组合。

输出部件是由控制模块操作的部件。 输出部件从控制部件接收电能。 输出部件以下述两种方式使用该电能。 输出部件可使用该电能来做功。 输出部件可使用该电能来提供信息。

Caterpillar Information System:

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