MITSUBISHI TRITON 4D56/4M41 Engine Common Rail System (HP3)

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Operation Section

1. PRODUCT APPILCATION INFOR-
MATION

1.1 Application .................................................. 1-1
1.2 System Components Part Number ............. 1-1
2. OUTLINE OF SYSTEM
2.1 Common Rail System Characteristics ........ 1-2
2.2 Features of Injection Control....................... 1-2
2.3 Comparison to the Conventional System.... 1-3
2.4 Composition................................................ 1-3
2.5 Operation .................................................... 1-4
2.6 Fuel System................................................ 1-4
2.7 Control System ........................................... 1-4
3. SUPPLY PUMP
3.1 Outline......................................................... 1-6
3.2 Exterior View Diagram ................................ 1-7
3.3 Supply Pump Internal Fuel Flow................. 1-7
3.4 Construction of Supply Pump ..................... 1-8
3.5 Operation of the Supply Pump.................... 1-9
4. SUPPLY PUMP COMPONENT
PARTS
4.1 Feed Pump ................................................1-11
4.2 SCV ( Suction Control Valve )....................1-11
4.3 Fuel Temperature Sensor ......................... 1-13
5. RAIL
5.1 Outline....................................................... 1-14
6. RAIL COMPONENTS PARTS
6.1 Rail Pressure Sensor (Pc Sensor)............ 1-15
6.2 Pressure limiter......................................... 1-15

7. INJECTOR (G2 TYPE)
7.1 Outline....................................................... 1-16
7.2 Characteristics .......................................... 1-16
7.3 Exterior View Diagram .............................. 1-17
7.4 Construction.............................................. 1-18
7.5 Operation .................................................. 1-18
7.6 QR Codes ................................................. 1-19
7.7 Injector Actuation Circuit ........................... 1-21

8. OPERATION OF CONTROL SYS-
TEM COMPONENTS

8.1 Engine Control System Diagram............... 1-22
8.2 Engine ECU (Electronic Control Unit) ....... 1-22
8.3 Cylinder Recognition Sensor (TDC).......... 1-23
8.4 Turbo Pressure Sensor ............................. 1-23
8.5 Mass Air Flow Sensor ............................... 1-24
8.6 Electronic Control Throttle ........................ 1-25
9. VARIOUS TYPES OF CONTROL
9.1 Outline....................................................... 1-27
9.2 Fuel Injection Rate Control Function......... 1-27
9.3 Fuel Injection Quantity Control Function... 1-27
9.4 Fuel Injection Timing Control Function...... 1-27
9.5 Fuel Injection Pressure Control Function (Rail
Pressure Control Function) ............. 1-27
10. FUEL INJECTION QUANTITY
CONTROL
10.1 Outline....................................................... 1-28
10.2 Injection Quantity Calculation Method ...... 1-28
10.3 Set Injection Quantities ............................. 1-28

Table of Contents

11. FUEL INJECTION TIMING CON-
TROL

11.1 Ouline........................................................ 1-32
11.2 Main and Pilot Injection Timing Control..... 1-32
11.3 Microinjection Quantity Learning Control.. 1-33

12. FUEL INJECTION RATE CON-
TROL

12.1 Outline....................................................... 1-35
13. FUEL INJECTION PRESSURE
CONTROL
13.1 Fuel Injection Pressure ............................. 1-36
14. DIAGNOSTIC TROUBLE CODES
(DTC)
14.1 About the Codes Shown in the Table........ 1-37
14.2 Diagnostic Trouble Code Details............... 1-37
15. EXTERNAL WIRING DIAGRAM
15.1 Engine ECU External Wiring Diagram ...... 1-42
15.2 Engine ECU Connector Diagram.............. 1-43