A modern gasoline injection system uses pressure from an electric fuel pump to spray fuel into the engine intake manifold. Ph explains find out how basic electronic fuel injection works and why the system superseded the classic carburettor by lewis kingston friday, january 19, 2018. The quantity of the fuel metered should vary to met changing speed and load requirements of the engine ii. Also explore the seminar topics paper on electronic fuel injection with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year mechanical engineering me or production automobile students for the year 2019 2020. Unlike carburetors, which rely on the vacuum created by the engine to draw fuel into the cylinders, fuel injection systems precisely deliver a consistent volume of fuel. Its the most universal type of electronic fuel injection system, but its not ideal for high performance engines.
The main difference between carburetor and fuel injection system carburetorzfuel is atomized by processes relying on the air speed greater than fuel speed at the fuel nozzle, zthe amount of fuel drawn into the engine depends upon the air velocity in the venturi fuel injection systemzthe fuel speed at the point of delivery is greater than the air speed to atomize the fuel. An electronic control unit receives information in the form of electric signals from the sensors. Depending on the particular system, the fuel is fired into either the inlet manifold or the inlet port via an injector. Carburetors were the goto fuel delivery system for many decades. Mar 07, 2020 in this way, by the use of mechanical petrol injection, the fuel is supplied to the engine cylinder via injector. The fuel filter is used to remove the impurities present in the fuel to avoid the disturbance during the flow. As we have discussed the petrol injection system, in the modern engines, in which the fuel injection system uses the sensors, a computer and a solenoid operated fuel injector to meter and inject the right amount of fuel into the engine cylinder called the electronic fuel injection system efi. But fuel injection has been around since the 1950s, and electronic fuel injection was used widely on european cars starting around 1980. In a car, the speed, the load, the altitude, the outside temperature. Automobile engineering report on electronic fuel injection system. Electronic fuel injection delivers much more accurate fuel delivery today, but it wasnt always so efficient.
More air is drawn into the engine once the cars in motion, so more fuel is needed from the injectors. Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector all diesel engines use fuel injection by design. The diesel engine is known as a ci compression ignition engine, while the gasoline engine is known as a spark ignition engine. Nov 24, 2015 modern cars use electronic fuel injection systems that are controlled by the ecu. Electronic fuel injection systems hilborn fuel injection.
This course is designed to dispel the myths associated with electronic fuel injection. Proflo 4 is not just a replacement for your carburetor, its a complete engineered system that provides the ultimate in performance, drivability and quality. Electronic fuel injection system offers complete flexibility in varying th e start of delivery of the fuel to obtain an optimum pressure curv e and low sm oke opacity 3. The rise of fuel injection was as predictable as the rise in popularity of cars themselves. Another mechanism is needed to deliver or spray the computed amount of fuel into each cylinder. In japan, the toyota celica used electronic, multiport fuel injection in the optional 18re engine in january 1974. Pdf development of an electronic fuel injection system. Understanding electronic fuel injection know your parts. By mapping the pump and the injector of 16v265h diesel engine, it comes to the conclusion of the structural parameters of the fuel injection system for electronic control unit pump. Fuel injection system after completion of this section the. Electronic fuel injection efi system use engine sensors, a computer and solenoid operated fuel injector to meter and inject right amount of fuel into the cylinders. Electronic fuel injection seminar report, ppt, pdf for. Currawong has a heavy fuel variant of its efi system that capitalizes on the precision fuel delivery performance of efi.
Fuel injection system an overview sciencedirect topics. Fuel injector cummins how liquid propane electronic fuel injection system works lpefi this video explains how the liquid propane electronic fuel injection system works lpefi built by bi. In trying to keep up with emissions and fuel efficiency laws, the fuel system used in modern cars has changed a lot over the years. Electronic fuel injection systems are a great way to meet these standards and vastly increase performances. Abstract the geometry of the diesel fuel injection nozzle and fuel flow characteristics in the nozzle significantly affects the processes of fuel atomisation, com. New direct fuel injection engine control systems for meeting. The heavy fuel system supports operation with jeta, jp5 and jp8 fuels. However, injecting it at the optimal moment and in optimal quantity is far from easy. Experimental study on the application of fuel injection. A highpressure electric pump is required to generate pressure so fuel will spray out of the fuel injectors when the injectors open. How engine cooling system works this video demonstrate how an internal combustion engine cooling system work. Mar 24, 2019 electronic fuel injection efi system use engine sensors, a computer and solenoid operated fuel injector to meter and inject right amount of fuel into the cylinders. Oct 28, 2009 all electronic fuel injection systems work in essentially the same way.
Pdf advanced electronic fuel injection systemsan emissions. We often receive inquiries from customers asking which aftermarket electronic fuel injection system is the best one. Injection pressures during the whole process should be above 1200 bar for a good spray formation and airfuel. If you like this presentation, dont forget to like. Principle of efi efi is an indirect, pressurized injection system with injectors operated by a solenoid.
A mechanical fuel pump that provides about 57 psi wont do the trick so youll need an electric fuel pump. Efielectronic fuel injection systems at summit racing. Injecting fuel into the fuel valve is a necessary process in any combustion engine. Common rail direct injection what is crdi technology. Electronic fuel injection systems require much more fuel pressure than a carburetor. Pdf this paper describes two advanced electronic fuel injection systems for small vehicles. Oct 19, 2018 electronic fuel injection systems require much more fuel pressure than a carburetor. Each component in our efi kit is selected specifically for your application to deliver the results you are seeking. Explore electronic fuel injection with free download of seminar report and ppt in pdf and doc format.
The system is composed by the fuel tank, the pipes, one or more fuel filters, a fuel pump that could be mechanical or electric and the fuel metering components such as the carburetor or fuel injection system. A modern fuel injection system technically includes some sort of a sensing mechanism to determine the correct amounts of fuel that need to be sprayed into the engines intake manifold. They were cheap to manufacture and easily adapted to new engines and higher power requirements. All information, illustrations and specifications contained in this manual are based on the latest product information available at the time of publication approval. Aug 20, 20 this video is the working principle animation of electronic fuel injection system. Electrical fuel pump draws the fuel from the tank through a filter and supplies the same to the injectors at a. How fuel injector works this video explains how gas patrol injector works. A fuel injector is a solenoid that opens and closes allowing fuel to pass through it. Fuel injection systems gasoline what is a fuel injection system.
An electronic fuel injection system for a 4stroke, 16 cylinders, v configuratio n, medium speed, large bore locomotive diesel engine has been developed an d successfully retrofitted o n a. The functions include control of the torque that arises in various. At the turn of 20th century, it was incredible for a vehicle to travel 60 miles per hour. Many modern cars come with electronic injection systems. A fuel pump sends the petrol to the engine bay, and it is then injected into the inlet manifold by an injector.
The system consists of a carb spacer plate with a fuel block and injector, an ecu, and a wide band o2 sensor. These systems use the electrical and electronic systems to monitor. Electronic fuel injection the story from carburetor to electronic fuel injection. Application of an electronic fuel injection system to a single. Modern cars use electronic fuel injection systems that are controlled by the ecu. The benefits of electronic fuel injection efi power4flight. The following characteristics of an injection system are desirable in achieving these goals. Edelbrock has been delivering the best combination of dyno proven electronic fuel injection performance for over 40 years. Mixing fuel this way allows for it to puddle and condense in the plenum of the intake manifold, a. Located in the exhaust system, these sensors detect the amount of unburned oxygen and fuel coming from the engine. Pdf development of an electronic fuel injection system for a 4.
Pdf automobile engineering report on electronic fuel. The fuel is to be stored in the fuel tank to supply it into the combustion chamber. Fuel return system closes and injection pump movementcauseshighpressure. In essence, these are almost the same as mechanical fuel injection systems except that they are not dependent on the amount of fuel and spring tension to open and close the valve of the injectors. Like a carburetor, it must provide the engine with the correct airfuel mixture for specific operating conditions. Today, it has been superseded by gasoline injection systems which thanks to. It includes everything youll need to get started tuning efi systems. How an engine works comprehensive tutorial animation. Between the years 1973 and 1995, the highly reliable, mechanical multipoint injection system kjetronic was installed as original equipment in seriesproduction vehicles. Fuel injector cummins how liquid propane electronic fuel injection system works lpefi this video explains how the liquid propane electronic fuel injection system works lpefi built by biphase. Kjetronic fuel injection system kjetronic is a mechanically and hydraulically operated fuel injection pump, introduced by bosch gmbh in the year 1973. The fuel mixes with the air passing through the inlet manifold or port and the fuel air mixture enters the combustion chamber. This video is the working principle animation of electronic fuel injection system. Nissan offered electronic, multiport fuel injection in 1975 with the bosch ljetronic system used in the nissan l28e engine and installed in the nissan fairlady z, nissan cedric, and the nissan gloria.
The crdi technology works in tandem with the engine ecu which gets inputs from various sensors. Once it finds what it likes, it tells the injector to remain open and spraying fuel for a given length of time. It gives the clear idea about how to work a fuel injection system. The fuel delivery system the fuel delivery system is responsible for fuel delivering at the engine. Like a carburetor, it must provide the engine with the correct air fuel mixture for specific operating conditions. Modern automobiles use electronic fuel injection efi in their fuel delivery system in order to increase the efficiency. Jan 19, 2018 ph explains find out how basic electronic fuel injection works and why the system superseded the classic carburettor by lewis kingston friday, january 19, 2018. The efi engines run more smoothly, with lower emissions and fuel consumption.
It is extremely difficult to operate a small engine on heavy fuel using carburetors, although attempts have been made by others to do this. File type pdf bosch electronic fuel injection systems shop manual understand and work with the fi practically this pdf will be solved sooner similar to starting to read. Take a technological leap forward with a new electronic fuel injection system from summit racing. Rather than steering our customers toward a particular system, we prefer to enable them to make an informed decision when selecting an aftermarket efi system.
Operation,diagnosis,and service 673 figure 297 the vacuummodulated pressure regulator controls system fuel pressure with a springloaded diaphragm. The diesel engine is known as a compressionignition engine, while the gasoline engine is a sparkignition engine. Design and analysis of electronic fuel injector of diesel engine t k s sai krishna, kasanagottu shouri, repala deepak kumar. Electronic fuel injection efi engine management electronic fuel injection efi engine management. Principle and working of electronic fuel injection system. Pdf development of an electronic fuel injection system for. Because of that, fuel pumps are a popular product line for shops to carry. Sep 25, 2018 the electronic control unit sends the electronic signal to the fuel injector with the help of the electronic connection, due to these electronic signals from the ecu the electromagnets inside the fuel injector got activated which in turn pushes the plunger outward results in opening of the nozzle and finally the spray of the fuel takes place. Carburetors were the goto fueldelivery system for many decades. The right is reserved to make changes at any time without notice.
The computer then compares that data to a stored map of fueling requirements. Fuel injection systems have a significant influence on the combustion process and hence a key role to play in improving engine fuel consumption and reducing noxious exhaust emissions. Whilst the precise fuel consumption reduction will vary from engine to engine and duty cycle to duty cycle, it is reasonable to expect a reduction in fuel consumption of 15% to 30% following conversion of a carbureted engine. The diesel fuel injection system is a major component of a properly operating engine. We showed you that, when a driver pushes his or her. Walbros eem tm injection system replaces the carburetor with a costeffective electronic fuel injection system. Electronic fuel injection system working this video is the working principle animation of electronic fuel injection system.
Some cars have multipoint fuel injection where each cylinder is fed by its own injector. What is multi point fuel injection mpfi system the mpfi is a system or method of injecting fuel into internal combustion engine through multi ports situated on intake valve of each cylinder. The former system is called multiport fuel injection and the latter is direct injection. Acces pdf electronic fuel injection system diesel engine can help you be a better. This design delivers the fuel into the air flow stream in the plenum similar to a carburetor. Ideal fuel injection system for many single and twin cylinder small engine applications. List of sensors that are used on efi engines it still runs. We carry many efi systemsmany selftuning and selflearningfrom the top players in engine performance, including msd ignition, edelbrock, holley, fast, accel, chevrolet performance, quick fuel, and more. The computer controls how long the injector stays open or in some cases how quickly it opens and closes. The ecu can adjust the amount of fuel injected into the engine to increase efficiency.
Electronic fuel injection system linkedin slideshare. Comparison of the fuel line pressure, injector needle lift and the in cylinder pressures of efi visavis mechanical fuel. An engine out of adjustment can cause excessive exhaust smoke, poor fuel economy, heavy carbon buildup within the combustion chambers, and short engine life. Hilborn electronic fuel injection hilborn fuel injection offers a wide range of ir manifolds and blown efi systems for street rodding to full race competition. Electronic fuel injection efi system explained merits and. All electronic fuel injection systems work in essentially the same way. When the f uel oil enters the cylinder, it will ignite because of the high temperatures. Bosch electronic fuel injection systems shop manual. Easy bolton design for lowest efi installation cost. A basic understanding of how components work will allow testing of nearly all parts of a fuel injection system.
The kjetronic pump requires no form of drive and one of its features is that it can meter the fuel as a function of the intake air quantity. An electronic fuel injection system was developed for a briggs. Fuel injection systems diesel ruimanuelvieirapinto 1090039 sistemas automoveis anolectivo20092010 fuel injectionsystems diesel sistemas automoveis anolectivo20092010 1 basic diesel fuel systems 2 injection pumps 3 injectors 4 inline injection pump 5 radial rotary injection pump 6 electronic injection systems 7 bibliography. The fuel system features components which are more intelligent in nature and controls them electrically electronically. The 1990 subaru justy was the last car sold in the united states to have a carburetor. It then calculates the precise quantity of fuel and timing of injection. Principle of efi efi is an indirect, pressurized injection system with injectors operated by.
These sensors are mounted at different parts of the engine. Introduction the purpose of this book is to provide the ordinary motorcycle owner with a better understanding of how modern fuel injection systems work in a motorcycle. This works much like the spray nozzle of a hose, ensuring that the fuel comes out as a fine mist. Electronic fuel injection, why it matters and how to.
Youll learn the different types of systems available, what components are needed and how each one works, and youll find out how injection and ignition systems operate and how to set. Gas engines can use gasoline direct injection, where the fuel is directly delivered into the combustion chamber, or indirect injection where the fuel is mixed with air before the intake stroke. Design and analysis of electronic fuel injector of diesel. File type pdf bosch electronic fuel injection systems shop manual understand and work with the fi bosch electronic fuel injection systems shop manual. Timing the injection of the fuel correctly in the cycle. Virtually every vehicle built since the late 1980s and early 1990s have been equipped with some type of electronic fuel injection.
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