Operation Section
1
–
5
(1) Sensors
• Detect the engine and driving conditions, and convert them into electrical signals.
(2) Engine ECU
• Performs calculations based on the electrical signals received from the sensors, and sends them to the actuators in order to achieve
optimal conditions.
(3) Actuators
• Operate in accordance with electrical signals received from the ECU. Injection system control is undertaken by electronically control-
ling the actuators. The injection quantity and timing are determined by controlling the duration and timing in which current is applied
to the TWV (Two-Way Valve) in the injector. Injection pressure is determined by controlling the SCV (Suction Control Valve) in the
supply pump.
Q001227E
Crankshaft Position Sensor (NE)
Accelerator Position Sensor
Engine Speed
Cylider Recognition Sensor (TDC)
Cylinder
Recognition
Load
Injector
Supply Pump (SCV)
•Injection Quantity Control
•Injection Timing Control
•Fuel Pressure Control
Other Sensors and Switches
EGR, Air Intake Control Relay, Light
Sensor
Actuator
Engine
ECU
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