1. A Seminar Report
Study of
Common Rail Direct Injection
(CRDI)
By
Rudrakshi Janardan Jadhav
Guided by
Prof :- Badadhe R.B
DEPARTMENT OF MECHANICAL SANDWICH
ENGINEERING
VISHWABHARTI ACADEMY’S COLLEGE OF
ENGINEERING,
AHMEDNAGAR- 414201
(2022-2023)
2. VISHWABHARTI ACADEMY’S COLLEGE OF ENGINEERING
CERTIFICATE
This is certify that Ms. Rudrakshi Janardan Jadhav has
successfully completed the seminar entitled ‘Common Rail Direct
Injection’ under supervision, in the partial fulfilments of Bachelor Of
Engineering - Mechanical Sandwich Engineering Of University Of Pune.
Date :
Place: AHMEDNAGAR
Prof. Badadhe R.B prof. kharad B.N
Guide (H.O.D)
Internal Examiner Dr. Dhongade V.
3. Principal
Acknowledgement
I would like to express my deep sense of gratitude to Prof. Badadhe R.B. in Mechanical
Sandwich Engineering Department, for his valuable guidance, unreserved co operation and
suggestions extended at all stages of Seminar work
I am very much thankful to Prof. Kharad B.N. Head of Mechanical Sandwich Engineering
Department for providing necessary facilities and the cooperation extended during seminar
work.
I am very much thankful to Mrs. Dhongade V, Principal for sharing their knowledge,
support during the Seminar work.
I am also grateful to my all faculty members for their support and encouragement.
I am thankful to my Family. Friends and Classmates whose moral support encouraged
me a lot over the entire duration of seminar work
Finally, I acknowledge all those who have helped me directly or indirectly for the completion
of seminar work
Ms.Rudrakshi Janardan Jadhav
4. Content
SR NO INDEX PG NO
TITLE PAGE
CERTIFICATE
ACKNOWLEDGEMENT
INDEX
LIST OF FIGURES
ABSTRACT
1 INTRODUCTION
2 HISTORY
3 DESCRIPTION OF SYSTEM
4 PRINCIPLE OF CRDI IN GASOLINE ENGINE
5 DIRECT INJECTION SYSTEM
6 COMMON RAIL DIRECT INJECTION FEATURES
7 ADVANTGES
8 DISADVANTAGES
9 CRDI FUTURE TRENDS
10 CONCLUSION
11 REFERENCES
5. ABSTRACT
This paper deals with the study of Common Rail Direct Injection. Diesel engines are getting
more attention thanks to their low emissions and low fuel consumption. The working and
emissions of diesel engines are strictly shaped by the injection pattern and the induced air
quality. Employment of diesel engines along with mechatronic systems together with the
advent of common-rail injection systems, which facilitates the flexibility of injection control,
has helped diesel engine to gain favorability and decrease the level of pertinent emissions and
noise. Expansion of mechatronic systems in the case of common-rail system has lead to a
complex multi-stage development procedure. Common-rail technology is designed to improve
the pulverization process. Conventional direct injection diesel engines for each injection must
repeatedly generate fuel pressure but in case of Common Rail Direct Injection (CRDI) engines
the pressure is built up autonomously of the injection sequence and remains constantly
available in the fuel line. In this system the high-speed solenoid valves are regulated by the
electronic engine management which individually control the injection timing and the amount
of fuel to be injected for each cylinder as a function of the cylinder's genuine need. In short,
pressure generation and fuel injection are independent of each other. This is a considerable
upper hand of common-rail injection over conventional fuel injection systems as CRDI
expands the controllability of the individual injection processes and also refines fuel
atomization, which contributes the saving of fuel and reducing the emissions. Because of the
increasing concerns of engine emissions from diesel engines, Common Rail Direct Injection
CRDI system is developed, which offers unlimited possibilities to control fuel injection rate
and potential to meet stringent emission legislations. This report presents a study and
investigation of common rail direct injection, its construction, advantages and how it is a
greener system. Calls for lower fuel consumption, reduced exhaust gas emissions, and quiet
engines are making greater demands on the engine and fuel injection system. These demands
can only be met by a fuel injection system that atomizes fuel at the nozzle finely enough and
at high injection pressure. At the same time the injected fuel quantity must be very precisely
metered, the rate of discharge curve must have an exact shape, and pre-injection and secondary
injection must be performable. A system that meets these demands is the common rail fuel
injection system.
