Electronic fuel injection systems use an electric fuel pump and pressure, rather than engine vacuum, to spray fuel into the engine intake manifold or combustion chambers. This allows for more precise fuel delivery and improved engine performance compared to carbureted systems. Modern systems are computer-controlled and use various sensors to monitor engine operating conditions and adjust fuel delivery accordingly through fuel injectors.
The heart of an automobile is its engine, and the heart requires a constant and ingenuous supply of blood, fuel in this case. There had been carburetors faithfully doing this holy work, but technology never seizes to move up. Therefore, the latest offering is the fuel injector for petrol engin es. Though it all started with a simple objective of supplying a controlled amount of fuel at proper intervals of time, it’s, as of now, not as simple as that. With emission norms getting stricter and changing trends in engine technology – high-speed engines, Variable displacement engines, Hybrid engines, etc – it became more and more of a necessity than a luxury to improve the fuel supply system.
Today’s fuel injection unit not only improves engine performance, but also helps in giving a cleaner exhaust that too with a increased fuel economy. The objectives can be attained using a microprocessor that directs the injector using a number of various input parameters. These parameters include manifold temperatures, throttle position, ignition timing, engine speed, load, and a lot more of other factors. The various strategically placed sensors measures these physical quantities and convey the same to the processor in electronic signals. The paper deals with the brief functionality and basic concept of operation of a modern fuel injector used in petrol engines.
The heart of an automobile is its engine, and the heart requires a constant and ingenuous supply of blood, fuel in this case. There had been carburetors faithfully doing this holy work, but technology never seizes to move up. Therefore, the latest offering is the fuel injector for petrol engin es. Though it all started with a simple objective of supplying a controlled amount of fuel at proper intervals of time, it’s, as of now, not as simple as that. With emission norms getting stricter and changing trends in engine technology – high-speed engines, Variable displacement engines, Hybrid engines, etc – it became more and more of a necessity than a luxury to improve the fuel supply system.
Today’s fuel injection unit not only improves engine performance, but also helps in giving a cleaner exhaust that too with a increased fuel economy. The objectives can be attained using a microprocessor that directs the injector using a number of various input parameters. These parameters include manifold temperatures, throttle position, ignition timing, engine speed, load, and a lot more of other factors. The various strategically placed sensors measures these physical quantities and convey the same to the processor in electronic signals. The paper deals with the brief functionality and basic concept of operation of a modern fuel injector used in petrol engines.
Do you know what is engine, how many types of engines are available now. How conversion of energy takes place from chemical energy to mechanical energy or useful work. Here engine classified according to their combustion, working stroke, arrangement of piston, fuel used for combustion and on the basis of ignition system. 4-stroke petrol engine and 4-stroke diesel engine are described briefly with all 4-strokes which are completed during power conversion process. 2-stroke engine or scooter engine is also described briefly with the complete details of combustion, charge( petrol,diesel ) filling process and how all 4 stroke process(suction, combustion,power stroke, exhaust) completed in 2 stroke engine.
The common rail fuel injection system is finding increasing use engines as it has the potential to drastically cut emissions and fuel consumption. This system provides control of many important parameters linked to the injection system. It has a wide range of applications, From small to heavy-duty engines.
An ignition system is a crucial part of internal combustion engines, which creates sparks to ignite the fuels in vehicles. Despites being used in a number of cars, it is used many other applications for example boilers operated on oil or gas.
Do you know what is engine, how many types of engines are available now. How conversion of energy takes place from chemical energy to mechanical energy or useful work. Here engine classified according to their combustion, working stroke, arrangement of piston, fuel used for combustion and on the basis of ignition system. 4-stroke petrol engine and 4-stroke diesel engine are described briefly with all 4-strokes which are completed during power conversion process. 2-stroke engine or scooter engine is also described briefly with the complete details of combustion, charge( petrol,diesel ) filling process and how all 4 stroke process(suction, combustion,power stroke, exhaust) completed in 2 stroke engine.
The common rail fuel injection system is finding increasing use engines as it has the potential to drastically cut emissions and fuel consumption. This system provides control of many important parameters linked to the injection system. It has a wide range of applications, From small to heavy-duty engines.
An ignition system is a crucial part of internal combustion engines, which creates sparks to ignite the fuels in vehicles. Despites being used in a number of cars, it is used many other applications for example boilers operated on oil or gas.
The presentation is discussing
1-Fuel Cycle when Car starts working
2-Design of fuel system (components)
3-Types of fuel System
4-Carburetor working at different Engine speeds
5-injection working at different Engine speeds
6-Which is preferable of fuel systems (advantage and disadvantage of different system)
introduction to premixed flame,its classification,laminar premixed flame,laminar premixed flame, structured of 1D premixed flame , various zones of premixed flame.
Theory and Design for Mechanical Measurements solutions manual Figliola 4th edDiego Fung
Figliola and Beasley’s 6th edition of Theory and Design for Mechanical Measurements provides a time-tested and respected approach to the theory of engineering measurements. An emphasis on the role of statistics and uncertainty analysis in the measuring process makes this text unique. While the measurements discipline is very broad, careful selection of topical coverage, establishes the physical principles and practical techniques for quantifying many engineering variables that have multiple engineering applications.
In the sixth edition, Theory and Design for Mechanical Measurements continues to emphasize the conceptual design framework for selecting and specifying equipment, test procedures and interpreting test results. Coverage of topics, applications and devices has been updated—including information on data acquisition hardware and communication protocols, infrared imaging, and microphones. New examples that illustrate either case studies or interesting vignettes related to the application of measurements in current practice are introduced.
This presentation gives the information about Screw thread measurements and Gear measurement of the subject: Mechanical measurement and Metrology (10ME32/42) of VTU Syllabus covering unit-4.
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Electronic fuel injection vs carburettorsSalman Ahmed
These slides give you an idea of the different types of fuel injection systems that have been used throughout time.
A comparison between carburettors and EFI has been also looked on.
This presentation was part of the course requirements of MEC 401 (Internal Combustion Engines) which I took in fall 2016. I made all the slides (participants in my group never works lol) and here I am uploading for the public if it can be of any help. Contact me for any info if needed.
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Razin Sazzad Molla
13107010@iubat.edu
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Quality and best engine provides better performance and boost our engines (vehicle's) efficiency. So it is better to follow a good engine management system.
Multi-point fuel injection system infuses fuel in to the intake valves of each cylinder. Sensors located in the vehicle's fuel engine system helps the control unit to determine when certain functions need to occur. Typical sensors used in multi-point fuel injection system are as follows:
PERFORMANCE OF ELECTRONIC FUEL INJECTION SYSTEM USING COMPRESSOR AND CONTROLLER sam_e_square
this ppt deals with the PERFORMANCE & WORKING OF ELECTRONIC FUEL INJECTION SYSTEM USING COMPRESSOR AND CONTROLLER.
in this case we are using compressor instead of fuel pump.
THIS PPT IS MAINLY BASED ON HOW THE ELCTRONIC FUEL INJECTION SYSTEMS IN DIFFERENT VEHICLES AND IN THIS WE HAVE DISCUSSED DIFFERENT TECHNIQUES IN DIFFERENT VEHIOCLEWS AND THEIR MODELS ALSO AND THEIR SYSTEMS ALSO IN THE VEHICLES AND THEIR COMPONENTS AND THEIR USES ARE ALSO MENTIONED IN THIS PPT SO IT IS USEFUL FOR BOTH MECHANICAL AND ELECTRONICS STUDENTS
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What Exactly Is The Common Rail Direct Injection System & How Does It WorkMotor Cars International
Learn about Common Rail Direct Injection (CRDi) - the revolutionary technology that has made diesel engines more efficient. Explore its workings, advantages like enhanced fuel efficiency and increased power output, along with drawbacks such as complexity and higher initial cost. Compare CRDi with traditional diesel engines and discover why it's the preferred choice for modern engines.
Why Is Your BMW X3 Hood Not Responding To Release CommandsDart Auto
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Core technology of Hyundai Motor Group's EV platform 'E-GMP'Hyundai Motor Group
What’s the force behind Hyundai Motor Group's EV performance and quality?
Maximized driving performance and quick charging time through high-density battery pack and fast charging technology and applicable to various vehicle types!
Discover more about Hyundai Motor Group’s EV platform ‘E-GMP’!
In this presentation, we have discussed a very important feature of BMW X5 cars… the Comfort Access. Things that can significantly limit its functionality. And things that you can try to restore the functionality of such a convenient feature of your vehicle.
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Discover the reasons why your BMW’s Active Steering malfunction warning might come on. From electrical glitches to mechanical failures and software anomalies, addressing these promptly with professional inspection and maintenance ensures continued safety and performance on the road, maintaining the integrity of your driving experience.
Comprehensive program for Agricultural Finance, the Automotive Sector, and Empowerment . We will define the full scope and provide a detailed two-week plan for identifying strategic partners in each area within Limpopo, including target areas.:
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We will also prioritize Industrial Economic Zone areas and their priorities.
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IBS monitors and manages your BMW’s battery performance. If it malfunctions, you will have to deal with an array of electrical issues in your vehicle. Recognize warning signs like dimming headlights, frequent battery replacements, and electrical malfunctions to address potential IBS issues promptly.
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Over the 10 years, we have gained a strong foothold in the market due to our range's high quality, competitive prices, and time-lined delivery schedules.
2. A modern gasoline injection system uses
pressure from an electric fuel pump to
spray fuel into the engine intake
manifold.
3. Like a carburetor, it must provide the engine
with the correct air-fuel mixture for specific
operating conditions.
Unlike a carburetor, however ,PRESSURE, not
engine vacuum, is used to feed fuel into the
engine .
This makes the gasoline injection
system very efficient
4. A gasoline injection system has several possible
advantages over a carburetor type of fuel
system.
Some advantages are as follows:
* Improved atomization. Fuel is forced into the intake
manifold under pressure that helps break fuel droplets
into a fine mist.
* Better fuel distribution. Equal flow of fuel
vapors into each cylinder.
* Smoother idle. Lean fuel mixture can be used without
rough idle because of better fuel distribution and low-
speed atomization.
5. * Lower emissions. Lean efficient air-fuel mixture
reduces exhaust pollution.
* Better cold weather drivability. Injection provides
better control of mixture enrichment than a
carburetor.
* Increased engine power. Precise metering of fuel
to each cylinder and increased air flow can result in
more horsepower output.
* Fewer parts. Simpler, late model, electronic fuel
injection system have fewer parts than modern
computer-controlled carburetors.
6. There are many types of gasoline injection
systems.
A basic knowledge of the different classifications :
* single- or multi-point injection
*indirect or direct injection
7. Single and Multipoint EFI Systems
Fuel injection systems classified by point of injection.
Single Point Fuel Injection (Throttle Body Injection - TBI)
Injector sprays
fuel from above
throttle valve.
ECU controls
injector opening.
Injector located inside
throttle body, sits on
top of inlet manifold.
Fuel in
Air in
Throttle valve
Injector
Inlet manifold
Throttle body
8. Single and Multipoint EFI Systems
Multipoint Fuel Injection
Injector located in each
branch of inlet manifold,
below throttle valve.
Injectors spray fuel
directly into each port.
ECU controls
opening of injectors.
Injectors
x 4, x6,
x8 etc.
Inlet manifold
Throttle valve
Fuel in
Air in
9.
10. A multi-point injection system, also called port injection, has an
injector in the port (air-fuel passage) going to each cylinder.
Gasoline is sprayed into each intake port and toward each intake
valve. Thereby, the term multipoint (more than one location)
fuel injection is used.
11. Overview of a computer-controlled high-pressure common
rail V-8 diesel engine
12. Electronic Injectors
• The injectors can survive the excessive temperature and
pressure of combustion by using the fuel that passes
through it as a coolant
13. • An indirect injection system
sprays fuel into the engine
intake manifold.
Most gasoline injection
systems are of this type.
• Direct injection forces fuel
into the engine combustion
chambers. Diesel injection
systems are direct type.
So Gasoline electronic
Direct Injection System
is Classified as : multi-point and Direct injection systems
14. Fuel System Diagrams and Schematics
Fuel System Block Diagrams - 1
Connection lines
Direction of
information
flow/control
System and
subsystem
blocks
Each block represents a
system.
Lines represent
connections between
systems.
Arrows represent direction
of flow.
16. Electronic control unit
• In automotive electronics, electronic control unit (ECU) is a
generic term for any embedded system that controls one or
more of the electrical systems or subsystems in a motor
vehicle.
• An engine control unit (ECU), also known as power-train
control module (PCM), or engine control module (ECM) is
a type of electronic control unit that determines the
amount of fuel, ignition timing and other parameters an
internal combustion engine needs to keep running. It does
this by reading values from multidimensional maps which
contain values calculated by sensor devices monitoring the
engine.
17. Working of ECU
Control of fuel injection: ECU will determine the quantity
of fuel to inject based on a number of parameters. If the
throttle pedal is pressed further down, this will open the
throttle body and allow more air to be pulled into the
engine. The ECU will inject more fuel according to how
much air is passing into the engine. If the engine has not
warmed up yet, more fuel will be injected .
Control of ignition timing : A spark ignition engine
requires a spark to initiate combustion in the combustion
chamber. An ECU can adjust the exact timing of the spark
(called ignition timing) to provide better power and
economy.
18. • Control of idle speed : Most engine systems have idle
speed control built into the ECU. The engine RPM is
monitored by the crankshaft position sensor which plays a
primary role in the engine timing functions for fuel
injection, spark events, and valve timing. Idle speed is
controlled by a programmable throttle stop or an idle air
bypass control stepper motor.
19. Common rail and Pressure sensor
The term "common rail" refers to the fact that all of the fuel
injectors are supplied by a common fuel rail which is
nothing more than a pressure accumulator where the fuel
is stored at high pressure. This accumulator supplies
multiple fuel injectors with high pressure fuel.
20. Fuel Injection System
Electronic Fuel Injection uses various engine sensors and control
module to regulate the opening and closing of injector valve.
•Fuel delivery system
•Air induction system
•Sensor system
•Computer control system
21. Fuel Delivery system
•Electrical Fuel Pump draws fuel from
tank and forces it into the regulator.
•Pressure Regulator controls the amount
of pressure that enters the injector and any
extra fuel is returned to the fuel tank.
•Fuel Injector is simply a coil or solenoid
operated valve.
•Spring pressure holds the injector closed.
•When engaged, the injector sprays fuel
into the engine.
Injector Pulse Width indicates the time each
Injector is energized (Kept Open).
22. Sensor System
•Monitors engine operating condition and reports this
information to ECM (computer).
•Sensors are electrical devices that change resistance or voltage
with change in condition such as temperature, pressure and position.
23. Engine Sensors
Oxygen Sensor measures the oxygen content in engine
exhaust.
•Mounted on the exhaust system before the
catalytic converter.
•Voltage out-put of O2 sensor changes with
the change in oxygen content of exhaust.
•Lean mixture decreases the voltage.
•Rich mixture increases the voltage.
•Signal is sent to ECM and the ECM changes the time that an injector
is open or close.
24. Engine Sensors
ThrottlePosition Sensor (TPS)
•Variable resister connected to the
throttle plate.
•Change in throttle angle =
change in resistance.
•Based on the resistance, ECM
richens or leans the mixture.
25. Engine Sensors
Engine Temperature Sensor
•Monitors the operating temperature of the engine.
•Exposed to engine coolant.
•Engine cold = Low Resistance = Rich Mixture
•Engine Hot = High Resistance = Lean Mixture.
26. Engine Sensors
Mass Air Flow Sensor (MAF)
•Measures the amount of outside air entering the engine.
•Contains an air flap or door that operates a variable resistor.
•Helps computer to determine how much fuel is needed.
27. Engine Sensors
Inlet Air Temperature Sensor
•Measures the temperature of air entering the engine.
•Cold air (more dense) = More fuel for proper AF ratio.
28. Engine Sensors
Crankshaft Position Sensor
•Detects engine speed.
•Changes injector timing and duration.
•Higher engine speed = More fuel
29.
30. Throttle Body Injection
•Uses one or two injectors.
•Injectors (pulse) spray fuel into the
top of throttle body air horn.
•Atomized fuel mixes with air and
drawn into the engine.
•Fuel pressure regulator is spring loaded
and is part of the housing.
• Fuel is being injected whenever
the engine is running, also called
CIS: Continuous Injection System.
31. EFI
EFI Multi port Injection System
•Injector is pressed into the runner(Port)
in the intake manifold.
•Injector sprays towards an engine
intake valve.
EFI Direct fuel Injection System
•Injectors are pressed into the
combustion chamber and spray fuel
directly into the combustion chamber.
• Each cylinder has it’s own
injector