SEAL 8N5130 - Caterpillar

Illustration 1 g01094786
Typical example (1) Secondary engine speed/timing sensor (2) Primary engine speed/timing sensor (3) Turbocharger outlet pressure sensor (4) Unit injector connector (5) Fuel temperature sensor (6) Inlet air temperature sensor (7) Timing calibration connector (8) Atmospheric pressure sensor connector (9) Electronic Control Module (ECM) connector (10) ECM connector
Illustration 2 g01094799
Electronic control system components (right side view) (11) Oil pressure sensor connector (12) Coolant temperature sensor connectorEngine Monitoring
An engine monitoring function is included in the electronic control system. The engine monitoring function monitors the following items:
Engine oil pressure
Coolant temperature
Inlet manifold air temperature
Coolant levelAll engines are shipped with the following sensors:
Oil pressure sensor
Coolant temperature sensor
Inlet air temperature sensor
Coolant level sensorThe coolant level sensor is the only sensor that can be individually selected for engine monitoring. The Electronic Control Module (ECM) programmable parameter enables the coolant level sensor. The default factory setting is "NO". The programmable parameters for the ECM have four levels that are for engine monitoring:
Off
Warning (Factory Default)
Derate
ShutdownEngine Monitoring is Programmed to "Off"
The ECM will ignore the oil pressure sensor and the coolant level sensor. Coolant Temperature is still used for Cold Mode. Inlet Manifold Air Temperature is used for operation in cold air regardless of the engine monitoring mode.Engine Monitoring is Programmed to "Warning "
Warning mode uses the following sensors: Oil Pressure, Coolant Temperature, Inlet Manifold Temperature and Coolant Level Sensor. Electronic Control System Operation
The fuel delivery and injection timing are electronically controlled. In comparison to engines that are controlled mechanically, the electronic control system provides increased control of timing and increased control to the fuel to air ratio. Injection timing is achieved by precise control of injector firing time, and engine power is controlled by adjusting the firing duration. The ECM energizes the fuel injection solenoid in order to start the injection of fuel. The ECM will de-energize the fuel injection solenoid in order to stop the injection of fuel. Refer to the Systems Operation, "Fuel System" for a complete explanation of the fuel injection process.The engine uses the following types of electronic components: input, control and output.An input component is one that sends an electrical signal to the ECM. The signal that is sent varies in either voltage or in frequency when there is a change in some specific system. An example would be the engine speed/timing sensor or the coolant temperature sensor. The electronic control module interprets the input sensor signal as information about the condition, environment, or operation of the engine.An electronic control system component receives the input signals. Electronic circuits that are inside the ECM evaluate the signals. The ECM then supplies electrical energy to the output components of the system, which are in response to predetermined combinations of input signal values.An output component is one that is operated by the ECM. An output component receives electrical energy from the ECM. The electrical energy is used to perform one of the following functions:
Perform work. An example would be moving a solenoid plunger. An output component takes an active part in regulating or operating