Common Rail Diesel Injection System

1. VISHWAKARMA INSTITUTE OF TECHNOLOGY
COMMON RAIL DISEL INJECTION SYSTEM
Guidance:- Prof. Dr. D. B. Hulwan Sir
Subject:- Hybrid And Electric Vehicles
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Sr No Name of Student Roll No. Gr. No.
1 Neha Deshpande 59 11920077
2 Shubham Deshtwad 61 11810380
3 Prajwal Dhore 63 11810226
4 Vaishnavi Dudhade 68 11920078
5 Furqan Gadwal 70 11920194

2. INTRODUCTION
 CRDI stands for Common Rail Direct Injection.
 The common rail system prototype was developed in the 1960s by Robert
Huber of Switzerland.
 CRDI means direct injection of the fuel into the cylinder of diesel engine
via a single, common line, called common rail which is connected to all
the fuel injectors.
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3. OPERATING PRINCIPLE
The solenoid or piezoelectric valves make possible fine
electronic control over the fuel injection time and quantity.
The higher pressure that the common rail technology
provides better fuel atomisation.
The engine electronic control unit can inject a small of
diesel just before the main injection event by using sensor.
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4. COMPONENTS OF CRDI
High Pressure Fuel Pump
Fuel Tank
Fuel Filter
Common Fuel Rail
Injectors
Engine Control Unit
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5. IMPORTANT COPMPONENTS
ECU Fuel Injector
Fuel Filter High Pressure Pump
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6. CONSTRUCTION
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7. WORKING
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8. MANUFACTURING PROCESS
3D Model
Manufacturing Drawings
Assembly in Solid works
Procurement Of Parts
Injector Body Machining on CNC
Testing and Quality Control of Individual Parts
Assembly
Testing of final Assembly
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9. ADVANCED CONTROL FUNCTIONS
Injector Quantity Adjustment
Pressure Wave Correction
Fuel Mean Value Adaption
Fuel Balance Control
Zero Fuel Calibration
Combustion Signal Based Control
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10. TRENDS IN DIESEL COMMON RAIL INJECTION
SYSTEM: INJECTORS
Piezo-Injector with Coaxial-
Vario-Nozzle
Hydraulically Amplified
Diesel Injector
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11. DESIGN OPTIMIZATION OF PIEZO-ELECTRIC
OPERATED FUEL INJECTORS
• Effect of spring characteristics on fuel injectors.
• Material used is ‘Hard drawn steel wire C’-High Carbon steel.
• Optimized spring design:
For engine speed:1200 rpm
Compression ratio:18
Thickness:0.8mm
Outerdiameter:4.8mm
Length:5.6mm
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12. ADVANTAGES OF PIEZOELECTRIC OPERATED
FUEL INJECTOR OVER SOLENOID OPERATED:
More fuel can be sprayed in one cycle than solenoid operated in
which max 3 time per stroke can be achieved.
Very high responsiveness of actuator & hence precise & accurate
injection control.
High combustion efficiency.
It provides feedback of minute fluctuations to ECU.
LIMITATIONS:
Expensive, hence not used in all vehicles.
Limited load bearing capacity of piezoelectric material due to more
dynamic loads.
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13. MANUFACTURERS OF CRDI FUEL INJECTORS:
1. Bosch-Solenoid & Piezoelectric operated.
2. Delphi-Solenoid & Piezoelectric operated.
3. Denso-Solenoid & Piezoelectric operated.
4. Siemens-Piezoelectric operated.
CARS USING PIEZO-ELECTRIC OPERATED FUEL
INJECTORS:
1. Ford Figo.
2. Ford Fiesta.
3. Renault Duster.
4. Toyota Etios.
5. Most high performance cars.
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14. ADVANTAGES
Enhances the power and performance of
engine.
Air mixes very uniformly with fuel.
Reduces noise and vibrations drastically.
Minimum wastage of fuel.
Maximum torque and power output.
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15. DISADVANTAGES
CRDi system is very complex and needs good kind
of skilled engineering work.
Can’t be used in all kinds of engines.
Cost of the spare parts is very high.
It demands very costly maintenance.
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16. CONCLUSION
Crdi engines no doubt costlier engines ,but saving
in the fuel can neutralize the cost of technology in
long run.
If one is buying a car with the CRDi engine , he or she
must keep in mind the that for what purpose he or she is
buying the car as it requires high maintenance cost.
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17. REFERENCES
https://carbiketech.com/wp-
content/uploads/2014/07/ECU-Crankit-01.jpeg
Ganesan- Internal Combustion Engine Book
https://www.youtube.com/watch?v=5AQ07-LF5JA
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18. THANK YOU
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