CAREER POINT UNIVERSITY

KOTA RAJASTHANMAJOR ASSIGNMENT

PRESENTATION ON voice operated FUEL INJECtor

Presented byshivamuid- k11915Branch- mechanicalCOURSE-B.TECH (3RD YEAR)

GUIDED BYAmardeep kumarAsst. professorDEPT. MECH ENGG.

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

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.

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.

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.

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

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.

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

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.

FUEL INJECTOR WORKING

FUEL INJECTOR WORKING

Electronic Control System

Fuel Delivery System

Air Induction System

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.

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.

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.

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

Periodic cleaning removes varnish & other deposits

Pressurized canister dispenses cleaning solution

Must disconnect fuel pump!

Injector Cleaning

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

DISADVANTAGES

Costly. Need regular maintenance. ECU can be hacked.

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.

QUESTION

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