C15 Industrial Engine MCW00001-UP(SEBP3815 - 61) - Documentation Page 1 of 5
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Product: INDUSTRIAL ENGINE
Model: C15 INDUSTRIAL ENGINE MCW
Configuration: C15 Industrial Engine MCW00001-UP
Systems Operation
C15 and C18 Industrial Engines
Media Number -SENR9843-10 Publication Date -01/12/2012 Date Updated -05/12/2012
i04337249
Electronic Control System Components
SMCS - 1900
Illustration 1 g01075138
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C15 Industrial Engine MCW00001-UP(SEBP3815 - 61) - Documentation Page 2 of 5
Typical example
(1) Inlet manifold pressure sensor
(2) Inlet air temperature sensor
(3) Electronic control module (ECM)
(4) Engine oil pressure sensor
(5) Atmospheric pressure sensor
(6) Secondary speed/timing sensor
Illustration 2 g01075143
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C15 Industrial Engine MCW00001-UP(SEBP3815 - 61) - Documentation Page 3 of 5
(7) Engine coolant temperature sensor
(8) Primary speed/timing sensor
Illustration 3 g01075146
Typical example
(9) Fuel pressure sensor
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C15 Industrial Engine MCW00001-UP(SEBP3815 - 61) - Documentation Page 4 of 5
(10) Fuel temperature sensor
Illustration 4 g01076713
(11) Coolant level sensor (Mounted in radiator)
The electronic control system is integrally designed into the fuel system, the air inlet, and the exhaust
system of the engine in order to control the fuel delivery and the timing of the injectors. The
electronic control system provides increased timing control and fuel air ratio control in comparison to
conventional mechanical engines. Injection timing is achieved by precise control of injector firing
time, and engine rpm is controlled by adjusting the firing duration. The Electronic Control Module
(ECM) energizes the solenoid in the unit injector in order to start the injection of fuel. Also, the ECM
de-energizes the unit injector solenoids in order to stop injection of fuel. Refer to the Systems
Operation, "Fuel System" topic for a complete explanation of the fuel injection process.
The engine uses the following types of electronic components:
• Inputs
• Controls
• Outputs
An input component is one that sends an electrical signal to the ECM. The signal that is sent varies in
one of the following ways:
• Voltage
• Frequency
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C15 Industrial Engine MCW00001-UP(SEBP3815 - 61) - Documentation Page 5 of 5
• Pulse width
The variation of the signal is in response to a change in some specific system of the vehicle. The ECM
sees the input sensor signal as information about the condition, environment, or operation of the
vehicle.
A control component (ECM) receives the input signals. 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 component. 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. The
output component can use that electrical energy in order to provide information.
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