Principle and working of electronic fuel injection system. Sequential fuel injection with dis and idle air control wide band oxygen sensing individual cylinder fuel and spark control options included buick v6 30212311 30222311 sequential fuel injection with inductive pickup and twostage nitrous system capability 302200 30223200 sequential fuel injection with inductive pickup and twostage. Fuel injection definition of fuel injection by merriamwebster. As a holley certified dealer, hilborn fuel injection has the ability to. Electronic fuel injection seminar report, ppt, pdf for. In the typical gasoline fuelinjection system, an electric fuel pump provides a specified fuel flow at the required system pressure to one or more fuelinjection valves, or fuel injectors. Browse our selection of electronic fuel injection here at steve schmidt racing engines your trusted source for high performance racing engines, parts, and accessories. Between the years 1973 and 1995, the highly reliable, mechanical multipoint injection system kjetronic was installed as original equipment in seriesproduction vehicles. The ljetronic is an electronically controlled fuelinjection system. This manual is designed to assist the technician unfamiliar with robert bosch fuel injection systems in locating faults in the ljetronic system, isolating the. In the case of the l jetronic, the amount of air drawn in by the engine is directly measured by an airflow sensor.
History of fuel injection injection pumps the one feature common to all injection pumps from the earliest to the presenthas been the use of plungers to create the required injection pressure. A basic understanding of how components work will allow testing of nearly all parts of a fuel injection system. And, for the fuel pump system, we developed and employed a module integrating the fuel pump, pressure regulator, and. Between the years 1973 and 1995, the highly reliable, mechanical multipoint injection system kjetronic was installed as. The following guide primarily discusses multiport electronic fuel injection systems since it is the dominate system used in most performance and racing applications. On a conventional return system, the fuel is sent to the engine through the supply line, and the excess is returned via the mechanical fuel pressure regulator to the tank through the return line. As this subject is large and fairly comprehensive it has been broken into the following sections. Many of them use a fuel pump essentially identical to the carbureted fuel system s. Like a carburetor, it must provide the engine with the correct airfuel mixture for specific operating conditions. Electronic fuel injection seminar report, ppt for me. Gasoline fuel injection system ljetronic bosch pdf.
Fuel delivery system certain mechanical fuel injection systems also utilize a mechanical fuel pump, typically some early gasoline fuel injection systems. Thisis necessary due to the added complexity and increased power output of the engine, the system provides a higher degree of mixture strength control than that provided by the k jetronic system. Most modern fuel injection systems are computerized. Find out how fuelinjection systems work and about the various configurations used in the cars today. A reliable electronic gaseous fuel injection system was designed and built in order to control the engine and also for the evaluation of control strategies. Early pumps reliedupon packedglands to minimize the leakage of high pressure fuelpast the plunger. Find out how fuel injection systems work and about the various configurations used in the cars today. At given instant, the fuel is injected in a specific cylinder by a mechanically operated valve, by means of a push rod and rocker arm. Since their introduction, jetronic fuel injection systems have proved them. Electronic fuel injection steve schmidt racing engines. This paper describes advanced electronic fuel injection system for small 4stroke vehicles. Ljetronic fuel injection systems for bmw e12s first fives. Mechanical fuel injection bosch kjetronic, bosch k jetronic fig.
Ljetronic electronic fuel injection only 530i 528i. In the typical gasoline fuel injection system, an electric fuel pump provides a specified fuel flow at the required system pressure to one or more fuel injection valves, or fuel injectors. Because the fuel is compressible, pressure waves are formed in the system. In the case of the ljetronic, the amount of air drawn in by the engine is directly measured by an airflow sensor.
High pressure in the header forces fuel to each of the nozzle. Many of them use a fuel pump essentially identical to the carbureted fuel systems. An auxiliary air valve, cold start injector and thermotime switch aid in cold starting and operation. For the most part, motorcycles and carburetors have come to a parting of the ways. The ke2jetronic fuel injection system is fitted to turbocharged engines. The injector simply acts as a spray nozzle to break up the fuel into a fine spray it doesnt actually control the fuel flow. Electronically controlled fuelinjection systems are dealt with in detail in the publication electronically controlled fuel injection in the bosch technical. Most of the theory and operation of multiport systems is also applicable to throttlebody electronic fuel systems. 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.
Electronic fuel injection system linkedin slideshare. The ljetronic was the first massproduced, fully electronic fuel injection system. Sequential fuel injection with inductive pickup and twostage nitrous system capability wide band oxygen sensing and individual cylinder fuel and spark control options included 302211 30223211 sequential fuel injection with inductive pickup and idle air control 302300 30223300. The purpose of the fuel injection system is to deliver fuel into the engine cylinders, while precisely controlling the injection timing, fuel atomization, and other parameters. Chrysler offered electrojector on the 1958 chrysler 300d. An electronic control unit receives information in the form of electric signals from the sensors. Jan 10, 2016 a reliable electronic gaseous fuel injection system was designed and built in order to control the engine and also for the evaluation of control strategies. The following table is a guide to the fuel paths marked by each blue arrow in figure 6. Fuel injection systems throttle body injection style free. Some, however, use a vane type fuel pump mounted directly to the injection pump fuel distributor assembly.
Today, it has been superseded by gasoline injection systems which thanks to electronics have been vastly im. The injectors are one of two types, depending on the injection system. Thisis necessary due to the added complexity and increased power output of the engine, the system provides a higher degree of mixture strength control than that provided by the kjetronic system. The last carburetorequipped car came off the assembly line in 1990. The main types of injection systems include pumplinenozzle, unit injector, and common rail. The gasoline fuel injector is an electromagnetic solenoidoperated or mechanical device used to direct delivery of or to meter pressurized fuel, or both. Electronic fuel injection efi system explained merits and. Gasoline fuel injection system ljetronic bosch pdf download. Today, it has been superseded by gasoline injection systems which thanks to. The first commercial electronic fuel injection efi system was the electrojector developed by bendix corporation in 1957. An excess pressure valve relief valve is built into the pump gasoline and diesel fuel injection. The growing demand for fuel injection systems from emerging nations such as china and india will boost the asia pacific market for fuel injection system. Originally, volkswagen adapted the ljetronic for the type 4 air cooled 411 engines sold in the united states due to more stringent emissions and fuel consumption regulations. This manual is designed to instruct the technician unfamiliar with robert bosch fuel injection systems to locate faults in the system, isolate the component in.
These sensors are mounted at different parts of the engine. The ow at a given point of the injection system changes as a function of time. Vw l jetronic fuel injection workshop manual author. Some, however, use a vane type fuel pump mounted directly to the injection pumpfuel distributor assembly.
A modern gasoline injection system uses pressure from an electric fuel pump to spray fuel into the engine intake manifold. The electronic control unit is used to estimate the pulse width of the signal that would actuate the fuel injector and the start of fuel injection. The first system uses continuous injection where the fuel is squirted into the inlet port all the time the engine is running. Ljetronic system fuel injectors n open when energized by ecu not continuous as k jetronic. Since then, fuel injectors have been the primary means of getting gasoline into the engine cylinder so it can combust and you can drive. Fuel injection 4 barrel systems msd atomic hitech dont see what your looking for call 18009942272 msds atomic efi systems were designed with two goals.
Electronically controlled fuel injection systems are dealt with in detail in the publication electronically controlled fuel injection in the bosch technical. Take a technological leap forward with a new electronic fuel injection system from summit racing. Fuel injection system ppt free download faadooengineers. Bosch kjetronic fuel injection systems volvo owners club. Gt fuel is used to establish and perform the simulation model of fuel injection system for 16v265h diesel engine.
The quantity of the fuel metered should vary to met changing speed and load requirements of the engine ii. Between china and india, china is expected to be the biggest market for fuel injection systems owing to the formidable growth in the china automobile industry. Each component in our efi kit is selected specifically for your application to deliver the results you are seeking. As a holley certified dealer, hilborn fuel injection has the ability to sell holley efi at the same.
Hilborn fuel injection offers a wide range of ir manifolds and blown efi systems for street rodding to full race competition. Principle and working of electronic fuel injection system all modern vehicles are provided with a fuel injection system to convey fuel to the engine while reducing the amount of harmful emissions that a vehicle emits off. Principles gasolinediesel fuel systems od1620 lesson 1task 1 d. Gtfuel is used to establish and perform the simulation model of fuel injection system for 16v265h diesel engine. Please consult your local distributor for those items you may require. Prior to ljetronic, mechanical fuel injection systems had proven that directly. Compared with that of local locomotive fuel injection system, the performance. Also, for the injector, the fuel passage and electric wiring were integrated into a single part by the use of a cap. Electronic fuel injection article about electronic fuel.
Timing the injection of the fuel correctly in the cycle. Pdf electronic fuel injection system electronic fuel. Fuel injection system the ke2jetronic fuel injection system is fitted to turbocharged engines. Between china and india, china is expected to be the biggest market for fuel injection systems owing to the formidable growth in. When the fuel is not distributed evenly to all cylinders, the engine. 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. Porsche continued using this system on its racing cars into the late seventies and early eighties. The common rail fuel system has capability of multiple injections during a combustion cycle. Electronic fuel injection systems hilborn fuel injection. Since the engine is hot, this process heats up the fuel and thus increases evaporative emissions. When the fuel is not distributed evenly to all cylinders, the engine will run unevenly and power output will decrease. Conventionally, the injection system of a diesel engine comprises a pump, a highpressure pipe, and an injection valve. Fuel injection system, holley super sniper 650 hp, 4150 flange, selftuning, black throttle body, kit 3 part number. Fuel injection system the ke2 jetronic fuel injection system is fitted to turbocharged engines.
Mechanical fuel injection bosch k jetronic, bosch k jetronic fig. Mar 23, 2017 common rail injection system in this system, single fuel pump supplies high pressure diesel oil to common rail or header. The fall of the carburetor how fuel injection systems work. Pdf advanced electronic fuel injection systemsan emissions. Leader in the pioneering and implementation of fuel injection systems mechanical fuel injection 866 4646553 electronic fuel injection 215 6434607 home about hilborn. A fuel injector is a solenoid that opens and closes allowing fuel to pass through it.
Efielectronic fuel injection systems at summit racing. 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. In the event of a restricted fuel filter or line blockage, the pump is capable of producing pressures of 700 kpa 100 psi or higher. 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. Common rail injection system in this system, single fuel pump supplies high pressure diesel oil to common rail or header. This manual may contain attachments and optional equipment that are not available in your area. Accurately timed multiple injections keep combustion temperatures low, this process helps in fuel economy but mostly it is the key to. The l jetronic is an electronically controlled fuel injection system. The bosch ljetronic fuel injection system used in the porsche 912e is often referred to as the air flow controlled or afc fuel injection system. Thisis necessary due to the added complexity and increased power output of the engine. Multipoint fuel injection seminar report pdf ppt download. While a few carburetorequipped bikes are still on the market, the vast majority of street bikes are now equipped with some form of electronic fuel injection, which despite the complication it adds, is both a better way to go, and undeniably here to stay, protests from the luddites notwithstanding. Oct 28, 2009 for the most part, motorcycles and carburetors have come to a parting of the ways. Between the years 1973 and 1995, the highly reliable, mechanical multipoint injection system k jetronic was installed as original equipment in seriesproduction vehicles.
The electronic fuel injectors at each cylinder control the delivery and timing of the fuel injections. Figure 3system schematic sepi 4stroke electronic injection final manuscript page 7 of 22 siat26. Fuel injection system market global industry analysis and. Fuel injection definition is a usually electronicallycontrolled system for injecting a precise amount of atomized fuel into the cylinders or the intake airstream of an internal combustion engine. The computer controls how long the injector stays open or in some cases how quickly it opens and closes. Materials and specifications are subject to change without notice. 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. Vw l jetronic fuel injection workshop manual created date. Modern injection systems reach very high injection pressures, and.