BOLT-FLANGE HEAD 2388292 - Caterpillar

Illustration 1 g01246160
Right side view (1) Electronic Control Module (ECM) (2) Coolant level sensor connector (3) Rack position sensor (4) Boost pressure sensor connector (5) Engine coolant temperature sensor (6) Engine oil pressure sensor (7) Speed sensor (8) Atmospheric pressure sensor
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View A-A (9) Fuel shutoff solenoid (10) Rack solenoid (BTM) (11) ATA data linkThe electronic control system is designed into the engine's fuel system. The system is designed to electronically control the delivery of fuel and injection timing.The engine uses the following three types of electronic components:
Input component
Control component
Output componentAn input component is one that sends an electrical signal to the ECM of the system. The signal that is sent varies in either of the following ways:
Voltage
FrequencyThe ECM interprets the signal from the input component as information about the condition, environment, or operation of the engine.A control component (ECM) receives the input signals from the input components. Electronic circuits inside the control component evaluate the signals from the input components. These electronic circuits also supply electrical energy to the output components of the system. The electrical energy that is supplied to the output components is based on predetermined combinations of input signal values.An output component is one that is operated by a control module. The output component receives electrical energy from the control group. The output component uses that electrical energy in one of two ways. The output component can use that electrical energy in order to perform work. As an example, a moving solenoid plunger will perform work. The output component can use that electrical energy in order to provide information. As an example, a dash panel light or an alarm will provide information to the operator of the engine.These electronic components provide the ability to electronically control the engine operation. Engines with electronic controls offer the following advantages:
Improvement in performance
Improvement in fuel consumption
Reduction in emissions levelsVarious sensors feed engine data to the ECM. These sensors modify the following functions:
Boost pressure
Engine oil pressure
Engine speed
Fuel rack position
Throttle position
On/off ignitionThe ECM processes the data. Then, the ECM sends electronic signals to the fuel injection solenoids. The fuel injection solenoids move the fuel rack. This will optimize the efficiency and the performance of the engine.The electronic engine control system also has the following built-in functions:
Engine overspeed
On board diagnosticsData Link
A data link is used for the following items:
Communicate engine information.
Communicate with Caterpillar Electronic Technician Cat ET.
Calibrate the electronic engine control system.
Troubleshoot the electronic engine control system.
Program the electronic engine control system.The electronic engine control system includes a Data Link. The Data Link communicates with other microprocessor based devices. These devices are compatible with SAE Recommended Practices J1708 and J1587. The Data Link can reduce the duplication of sensors by allowing the controls to share information.The Data Link is used to communicate engine information to other electronic control systems. Also, the Data Link can interface with Cat ET.The Data Link monitors engine information. The engine information that is available on the Data Link includes the following information:
Boost pressure
Engine identification
Engine speed
Oil pressure
Rack position
Status