The function of an Electronic ignition system is to produce the spark to ignite the air-fuel mixture in a timely manner for maintaining the effective combustion
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 function of an Electronic ignition system is to produce the spark to ignite the air-fuel mixture in a timely manner for maintaining the effective combustion
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.
This slides are about inline injection pump and calibration of the pumps .The working of the pump is described in simple words and with examples of daily usable devices.
This slides are about inline injection pump and calibration of the pumps .The working of the pump is described in simple words and with examples of daily usable devices.
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.
A basic guide to Automotive Engineering. A must have for Automobile/Mechanical Engineers.
Includes all technologies like - Traction control, ABS, etc
CONTENTS:
1. Car body construction
2. Engines
3. Fuel Supply in Petrol & Diesel Engines
4. Engine related systems
5. Drive Train
6. Suspension & steering
7. For safety
8. Emissions
9. Electrical & HVAC systems
SHREE RAMKRISHNA INSTITUTE OF SCIENCE & TECHNOLOGY (2).pptxyahomithi
Fuel Induction Systems
Must deliver proper mixture of air and fuel to be burned efficiently
This preparation is to be carried out over entire engine operating regime.
It should also ensure smooth and reliable operation.
The fuel Induction systems for SI engine are classified
Carburetors.
Throttle body Fuel Injection Systems.
Multi Point Fuel Injection Systems
A carburetor is basically a device for mixing air and fuel in the correct amounts for efficient combustion. The carburetor bolts to the engine intake manifold. The air cleaner fits over the top of the carburetor to trap dust and dirt.
In this unit we will discuss three common types of carburetors. They are
Natural or side draft
Updraft
Downdraft
This carburetor is used where there is little space on top of the engine. The air horizontally into the manifold.
This type is placed low on the engine and use a gravity fed-fuel supply. In other words, the tank is above the carburetor and the fuel falls to it.
The principles of carburetion are presented so you may better understand the inner workings of a carburetor and how the other components of the fuel system function to provide a combustible mixture or air and fuel to the engine cylinders.
Carburetor parts are not expensive as that of fuel injectors, especially EFI, which would give you large savings.
With the use of carburetor you get more air and fuel mixture.
In terms of road test, carburetors have more power and precision.
Carburetors are not restricted by the amount of gas pumped from the fuel tank which means that cylinders may pull more fuel through the carburetor that would lead to denser mixture in the chamber and greater power as well.
At a very low speed, the mixture supplied by a carburetor is so weak that it will not ignite properly and for its enrichment, at such conditions some arrangement in the carburetor is required.
The working of carburetor is affected by changes of atmospheric pressure.
More fuels are consumed since carburetors are heavier than fuel injectors.
More air emissions than fuel injectors.
Maintenance costs of carburetor is higher than with fuel injection system.
MPFi is a fuel injection technique used in gasoline engines.Multi port fuel injection injects fuel into the intake ports of each cylinder's intake valve, rather than at a central point within an intake manifold like in spark plugs.
Single-point or throttle body injection.
Port or multi-point fuel injection.
Sequential fuel injection.
Direct injection
This is the basic principle of working of a MPFI. The power is produced in a petrol engine is by burning the fuel. ... At first, the petrol is allowed to mix with air. It is then ignited in a cylinder called as the combustion chamber
The primary difference between carburetors and fuel injection is that fuel injection atomizes the fuel by forcibly pumping it through a small nozzle under high pressure, while a carburetor relies on suction created by the air accelerated through a tube to draw t
MODERN DEVELOPMENT IN SUCTION PROCESS OF IC ENGINESgautam472
This review paper deals with the evolution of the general processes employed in the suction process of IC Engines. The suction process has evolved from the traditional use of carburettors to much more sophisticated systems like CRDi, MPFi, etc. used in modern days. In doing so, various parameters such as the volumetric efficiency and the turbulence, etc. inside the engine have to be considered. Additional processes such as supercharging and turbocharging are employed to improve these parameters. It is also highly desirable to vary the Air-Fuel ratio effectively according to the speed of the engine for better power output and mileage. Thus researchers have developed several ways over the years to achieve it. Recent research work being carried out in this field is in the areas of Pressure Wave Superchargers, Variable Geometry Turbochargers, Multiple Intake valves, Shrouded Intake Valves, Camless Engines etc. Many of these technologies have been employed in the industry such as the DTS-Si, TDi&i-vtec Engines.
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.
====================
Razin Sazzad Molla
13107010@iubat.edu
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Point function and Path function, quasi
static process, Equilibrium, Temperature (concepts, scales, international fixed points and
measurement of temperature), Constant volume gas thermometer and constant pressure gas
thermometer, mercury in glass thermometer.
This video includes:
Purpose of Data Science, Role of Data Scientist, Skills required for Data Scientist, Job roles for Data Scientist, Applications of Data Science, Career in Data Science.
How to Add Chatter in the odoo 17 ERP ModuleCeline George
In Odoo, the chatter is like a chat tool that helps you work together on records. You can leave notes and track things, making it easier to talk with your team and partners. Inside chatter, all communication history, activity, and changes will be displayed.
Delivering Micro-Credentials in Technical and Vocational Education and TrainingAG2 Design
Explore how micro-credentials are transforming Technical and Vocational Education and Training (TVET) with this comprehensive slide deck. Discover what micro-credentials are, their importance in TVET, the advantages they offer, and the insights from industry experts. Additionally, learn about the top software applications available for creating and managing micro-credentials. This presentation also includes valuable resources and a discussion on the future of these specialised certifications.
For more detailed information on delivering micro-credentials in TVET, visit this https://tvettrainer.com/delivering-micro-credentials-in-tvet/
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Thinking of getting a dog? Be aware that breeds like Pit Bulls, Rottweilers, and German Shepherds can be loyal and dangerous. Proper training and socialization are crucial to preventing aggressive behaviors. Ensure safety by understanding their needs and always supervising interactions. Stay safe, and enjoy your furry friends!
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
This presentation includes basic of PCOS their pathology and treatment and also Ayurveda correlation of PCOS and Ayurvedic line of treatment mentioned in classics.
2. WHAT IS
MPFI?
Multi Point Fuel Injection
The term MPFI is generally used to specify an
engine variant used in the petrol vehicles.
A small computerized system is used to control
the engine of the car.
A petrol car will have more than three cylinders.
The MPFI engine is abbreviated as the Multi point
fuel injection engine.
The MPFI engine got this name because of the
reason that each cylinder is having a fuel injector
installed near them. That is why they are called as
the Multi point fuel injection engine.
4. PRINCIPLE
BEHIND MPFI
At first, the petrol is allowed to mix with air. It is then ignited
in a cylinder called as the combustion chamber.
This combustion of the petrol produces a sufficient energy
to run the engine.
Carburetor used to mix the fuel and air in a fixed air-fuel
ratio. The fuel thus mixed in the carburetor is then given to
the combustion chamber where this mixture gets ignited.
The power thus obtained from the ignition of gas is used to
drive the engine.
The main disadvantage of the Carburetor is that the mixing
of fuel and air is not in the proper ratio which leads to the
wastage of fuel and the pollution is high.
5. As we said earlier that the MPFI engine is having a fuel
injector for each cylinder. A computer is used to
control each and every fuel injector individually.
The computerized system of the car consists of a
microcontroller. This microcontroller monitors each
fuel injectors and keeps on telling each injector about
the amount of fuel to be injected to the cylinder so
that the fuel wastage can be reduced.
WORKING OF MPFI
ENGINE
6. THERE ARE A
NUMBER OF
SENSORS USED IN
THE MPFI ENGINE.
The engine temperature of the
vehicle.
The speed at which the engine is
running.
The engine load.
The position of the accelerator.
The cylinder's air-fuel pressure.
The rate of exhaust.
7. The amount of fuel to be injected into the combustion chamber
is decided by analyzing the inputs given to the computerized
system of the MPFI engine.
In modern MPFI engines, a memory unit is additionally installed.
This will make the MPFI engine capable of storing the user
settings so that it can operate easily. The driving habits of a
driver can also be detected by this system so that the MPFI
system itself can change the predefined settings which suit the
user.
8. Each cylinder or the air-fuel mixing chamber is supplied with the precise and
uniform quantity of the air-fuel mixture.
Engine crank is not necessary in cold climatic conditions.
Good engine response to the throttle applied.
Accurate supply of the air-fuel mixture.
ECM technique is used to control the engine.
High fuel efficiency or mileage.
ADVANTAGES
OF MPFI
9. WHAT IS
CRDI?
Common Rail Diesel Injection
Common rail engines require a very short (< 10 seconds)
to no heating-up time, depending on ambient temperature,
and produce lower engine noise and emissions than older
systems.
Diesel engines have historically used various forms of fuel
injection. Two common types include the unit injection
system and the distributor/inline pump systems (See diesel
engine and unit injector for more information).
10. CRDI
Solenoid or piezoelectric valves make
possible fine electronic control over the
fuel injection time and quantity, and the
higher pressure that the common rail
technology makes available provides
better fuel atomization.
To lower engine noise, the engine's
electronic control unit can inject a small
amount of diesel just before the main
injection event ("pilot" injection), thus
reducing its explosiveness and vibration,
as well as optimizing injection timing and
quantity for variations in fuel quality, cold
starting and so on.
11. The pumps are cam driven, and injection pressure
was proportional to engine speed. This typically
meant that the highest injection pressure could
only be achieved at the highest engine speed and
the maximum achievable injection pressure
decreased as engine speed decreased. This
relationship is true with all pumps, even those used
on common rail systems. With unit or distributor
systems, the injection pressure is tied to the
instantaneous pressure of a single pumping event
with no accumulator, and thus the relationship is
more prominent and troublesome.
They were limited in the number and timing of
injection events that could be commanded during a
single combustion event. While multiple injection
events are possible with these older systems, it is
much more difficult and costly to achieve.
12. For the typical distributor/inline system, the start of injection
occurred and ended at a pre-determined pressure. Once the
pressure in the injector reached a pre-determined level, the
plunger would lift and injection would start.
In common rail systems, a high-pressure pump stores a reservoir
of fuel at high pressure — up to and above 2,000 bars (200 MPa;
29,000 psi).
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.
The fuel injectors are typically ECU-controlled. When the fuel
injectors are electrically activated, a hydraulic valve (consisting of
a nozzle and plunger) is mechanically or hydraulically opened and
fuel is sprayed into the cylinders at the desired pressure.
If the accumulator, pump and plumbing are sized properly, the
injection pressure and rate will be the same for each of the multiple
injection events.