VOICE OPERATED FUEL INJECTOR

1. CAREER POINT UNIVERSITY
KOTA RAJASTHAN
MAJOR ASSIGNMENT

2. Presented by
shivam
uid- k11915
Branch- mechanical
COURSE-B.TECH (3RD YEAR)
GUIDED BY
Amardeep kumar
Asst. professor
DEPT. MECH ENGG.

3. CONTENT
 Introduction
 Voice operated fuel injector
 History
 Types Of Fuel Injector
 Components Of Electronic Injection System
 Fuel Injector Working
 How The Injector Fires
 Injector Cleaning
 Advantages
 Disadvantages
 References

4. INTRODUCTION
 Fuel injection is a system for mixing fuel with air in an Internal Combustion Engine.
 It has become the primary fuel delivery system used in gasoline automotive engines,
having almost completely replaced carburetors in the late 1980s.
 With the advent of electronic fuel injection (EFI), the diesel and gasoline hardware
has become similar.
 Computers used to calculate fuel needs
 EFI very precise, reliable & cost effective
 EFI provide correct A/F ratio for all loads, speeds, & temp ranges.

5. Voice Operated Fuel Injector
 The project Voice Operated Fuel Injector is developed for injecting fuel to the
users vehicle by voice signal of the user is called Voice Operated Fuel Injector
System.
 This is user-friendly and easy to use. This project is good idea for Mechanical
and automobile engineering students.

6. HISTORY
 Frederic joined Forward gas engine in 1889 and do experiments in fuel injection.
 Fuel injection was in widespread commercial use in diesel engines by mid 1920s. The
direct injection was in employed in some notable designs like Benz, BMW.
 First gasoline injection system was developed by Bosch and introduced in 1955 in
Mercedes Benz-300 SL.
 Voice operated fuel control system has not been used till now.

7. Types of Fuel Injector
 Top Feed-Fuel enters from the in the top and exits the bottom.
 Side Feed-Fuel enters on the side on the injector fitting inside the
fuel rail.
 Throttle Body Injection-located directly in throttle body

8. Components Of voice operated fuel injector System
Electronic Parts
 LCD display unit
 Voice signal processing circuit
 Microphone
 Micro controller unit
 Valve circuit
Mechanical Parts
 Fuel tank.
 Fuel pump.
 Fuel filter and lines.
 Injector or injectors.
 Fuel rail.
 Pressure regulator.

9. About Voice Operated Fuel Injector
 Here we tell the required level of fuel (say 1 litre, 2 litre) to micro
controller through a transducer called microphone.
 We already know that microphone is one of the transducer device it
convert the incoming sound energy in to electrical energy, which is fed to
voice signal-processing circuit for analysing the incoming frequency
range. After that it is given to micro controller unit for controlling the
output valve circuit.
 The opening and closing time mechanism of output valve circuit is
depending on the voice signal, which is detected from the voice signal
processing circuit.
 Here LCD display is interfaced with micro controller for display the
required level of fuel that is same as what we told through the
microphone. So from the LCD display we can find the fuel output, which
is fed from output valve

10. ELECTRONIC CONTROL UNIT
 ECU determines precisely how much fuel needs to be delivered by the injector by
monitoring the engine sensors.
 ECU monitors engine operating parameters via various sensors.
 The optimum amount of injected fuel depends on conditions such as engine and
ambient temperatures, engine speed and workload, and exhaust gas composition.
 Monitoring temperature and other sensors etc.

11. FUEL INJECTOR WORKING

12. FUEL INJECTOR WORKING
 Electronic Control System
 Fuel Delivery System
 Air Induction System

13. Electronic Control System
 Comprises of various electronic parts including sensor.
 The sensor sends signal to the Electronic Control Unit.
 The ECU processes all these signal and send appropriate commands to the
injectors.
 The injector inject fuel as per the command.

14. Fuel Delivery System
 It consist of fuel tank, fuel pump, fuel filter, fuel delivery pipe, fuel
injector, fuel pressure regulator and fuel return pipe.
 Fuel is delivered from the tank to the injector by means of an electric fuel
pump. The pump is typically located in or near the fuel tank.
 Fuel is maintained at a constant pressure by means of a fuel pressure
regulator.

15. Air Induction System
 The air induction system consists of the air cleaner, air flow meter, throttle
valve, air intake chamber, intake manifold runner, and intake valve.
 When the throttle valve is opened, air flows through the air cleaner, through the
air flow meter (on L type systems), past the throttle valve, and through a well
tuned intake manifold runner to the intake valve.

16. How the Injector Fires
 The computer grounds the injector to turn it “pulse” -- “Pulse width”
 Pulses timed by crankshaft sensor (CKPS). And/or camshaft sensor (CPS).
 Three ways to fire the injectors:
1. Group
2. Gang injection
3. Sequential injection

17.  Periodic cleaning removes varnish
& other deposits
 Pressurized canister dispenses
cleaning solution
 Must disconnect fuel pump!
Injector Cleaning

18. Advantages
 Uniform Air/Fuel Mixture Distribution.
 Highly Accurate Air/Fuel Ratio Control Throughout All Engine Operating
Conditions.
 Excellent Fuel Economy With Improved Emission Control.
 Improved Cold Engine Start ability.
 Simpler Mechanics, Reduced Adjustment Sensitivity

19. DISADVANTAGES
 Costly.
 Need regular maintenance.
 ECU can be hacked.

20. REFERENCES
 “Automobile Electrical and Electronic Systems(Third edition)” by Tom Denton BA,
AMSAE, MITRE, Cert.Ed.Associate Lecturer, Open University.
 “Gasoline Fuel-Injection System K-Jetronic” by Dipl.-Ing. (FH) Ulrich Adler, Joachim
Kaiser, Berthold Gauder, Leinfelden-Echterdingen.
 “Service Procedures 2379-03-02-02 Copper Sleeve, Unit Injector,
Replacement(One)” by Volvo Trucks North America Greensboro, NC USA.
 “Service Procedures 2379-03-02-01 Unit Injector, Replacement D16 Engines” by
Volvo Trucks North America Greensboro, NC USA.