Common Rail Fuel Injection System (CRDI)

1. Mass Air Flow Sensor (MAFS)

2. Intake Air Temperature Sensor (IATS) #1

3. Boost Pressure Sensor (BPS)

4. Intake Air Temperature Sensor (IATS) #2

5. Engine Coolant Temperature Sensor (ECTS)

6. Camshaft Position Sensor (CMPS)

7. Crankshaft Position Sensor (CKPS)

8. Rail Pressure Sensor (RPS)

9. Lambda Sensor #1

10. Lambda Sensor #2

11. Exhaust Gas Temperature Sensor #1

12. Exhaust Gas Temperature Sensor #2

13. PM Sensor

14. DPF Differential Pressure Sensor (DPS)

15. Fuel Temperature Sensor (FTS)

16. Water Sensor

17. Injector

18. Fuel Pressure Control Valve (FPCV)

19. EGR Cooler Bypass Solenoid Valve

20. Rail Pressure Regulator Valve (RPRV)

21. Air Control Valve (ACV)

22. Variable Swirl Actuator (VSA)

23. Electric VGT Control Actuator

24. Electric EGR (VSA) Control Valve

● Low Pressure Fuel Circuit
Fuel Sender

Located in the fuel tank, the fuel sender measures the amount of fuel in the fuel tank.

Fuel Filter

Located between the low pressure fuel pump and the high pressure fuel pump, the fuel filter filters the fuel delivered from the fuel tank.

● High Pressure Fuel Circuit
1. High Pressure Fuel Pump

The high pressure fuel pump compresses fuel up to 2,000 bar and delivers the compressed fuel to the common rail.

2. Common Rail

Connected with the high pressure fuel pump and the injectors by the high pressure fuel pipes, the common rail stores the fuel compressed in the high pressure fuel pump. The ECM controls the fuel pressure in the common rail by using the rail pressure sensor and the rail pressure regulator valve installed on the common rail.

3. Injector

The injector injects the high pressure fuel stored in the common rail into the cylinder by the ECM control signal.

4. High Pressure Fuel Pipe

The high pressure fuel pipe is a channel in high pressure fuel circuit consisting of the high pressure fuel pump, common rails, and injectors. It is made of a steel tube that can withstand high frequency generated when the fuel pressure reaches the maximum pressure or fuel injection stops.

The difference in length between the common rail and each injector is compensated by slight or prominent bending in each length of tubing. Nevertheless, the injection lines should be kept as short as possible.

Яндекс.Метрика