HOSE AS 2259645 - Caterpillar

Engines with 16 cylinders have one Electronic Control Module (ECM). Engines with 20 cylinders have two modules. The ECM controls most of the functions of the engine.The operator's interface with the engine control is provided by the Caterpillar Electronic Technician (ET) and by the optional control panel. For information on Cat ET, refer to Systems Operation/Testing and Adjusting, "Electronic Service Tools".Many of the engine control's parameters can be programmed for the specific site. For information on the programmable parameters, refer to Systems Operation/Testing and Adjusting, "Electronic Control System Parameters".The starting motor solenoid, the Gas Shutoff Valve (GSOV), and other components are used to control start-up and shutdown. For information on start/stop sequencing, refer to Systems Operation/Testing and Adjusting, "Start/Stop Control".The ECM provides the timing and the voltage for ignition. For information on ignition control, refer to Systems Operation/Testing and Adjusting, "Ignition System".Feedback from sensors and adjustment of the fuel metering valve enable control of the exhaust emissions. For information on air/fuel ratio control, refer to Systems Operation/Testing and Adjusting, "Air/Fuel Ratio Control (Oxygen Feedback)" or Systems Operation/Testing and Adjusting, "Air/Fuel Ratio Control (Charge Density)".The desired speed is maintained through control of the throttle actuator. For information on governing of the engine, refer to Systems Operation/Testing and Adjusting, "Engine Governing".The ECM controls the compressor bypass group. For information on the compressor bypass group, refer to Systems Operation/Testing and Adjusting, "Compressor Bypass".Other sensors enable the ECM to monitor the engine operation. For information on engine monitoring and protection, refer to Systems Operation/Testing and Adjusting, "Engine Monitoring System".The monitoring system includes the Integrated Temperature Sensing Module (ITSM). The ITSM monitors the engine's exhaust temperatures. For information on the module, refer to Systems Operation/Testing and Adjusting, "Integrated Temperatutre Sensing Module (ITSM)".Illustrations 1 and 2 are typical diagrams of the components in the engine's electronic control system.
Illustration 1 g01097084
Typical diagram of the electronic control system that uses oxygen feedback
Illustration 2 g01097087
Typical diagram of the electronic control system that uses charge density