Electronic fuel injection system electronic control unit instruction. 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. Automotive electronics consists of advanced sensors, control units, and mechatronic actuator making it increasingly complex. Efi equipped engines generally provide higher power and torque than a carbureted version of the same engine. 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. The efi is controlled by the ecu electronic control unit which interprets data from sensors that monitor the vital parts of the engine. Special tools which are required for system service are listed later in this section see table of contents. Application of an electronic fuel injection system to a single. 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. Pdf development of an electronic fuel injection system. Common pressure reservoir into which all the injector nozzles are connected. Modern automobiles use electronic fuel injection efi in their fuel delivery system in order to increase the efficiency. Todays impressively powerful vehicles are possible through direct fuel injection. Thank you very much for purchasing thefi system ecu electronic control unit.
The design involved replacing the existing cylinder head with one designed to incorporate the direct injection valves as well as a modified combustion chamber. New direct fuel injection engine control systems for meeting. Injection pressures during the whole process should be above 1200 bar for a good spray formation and airfuel. Pdf catalog leader in the pioneering and implementation of fuel injection systems mechanical fuel injection 866 4646553 electronic fuel injection 215 6434607.
Since introducing a direct fuel injection engine control system in 1997, the hitachi group has continued to. Figure 3system schematic sepi 4stroke electronic injection final manuscript page 7 of 22 siat26. Design and development of electronic fuel injection control system. 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. This paper describes two advanced electronic fuel injection systems for small vehicles which have recently become commercially available. 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.
Pdf advanced electronic fuel injection systemsan emissions. Fuel injection system 412 precautions in servicing when handling the fuel injection component parts or servicing the fuel injection system, observe the following points for the safety of the system. Electronic fuel injection efi is interesting tech, critical to the performance of a modern engine. The fuel pump pulls fuel from the gas tank, pressurizes it and forces it to the fuel injectors. The following characteristics of an injection system are desirable in achieving these goals. General be sure to relieve the fuel pressure while the engine is off. Pdf advanced engine performance diagnosis, fuel injection system,computer control system, sensors system find, read and cite all the. Diesel engine computer systems electronic unit fuel injection eui systemsrelying on data the oem loaded into the ecm, throttle position, engine and outdoor temperature, and even altitude, the computer system energizes and deenergizes the solenoids that control the. It is difficult to optimize power andor torque across a wide range of engine speeds with carburetors, whereas efi systems are capable of optimizing airfuel ratios and ignition timing over the whole range of operating speeds while at the same time compensating for other. Fuel injection is a system for mixing fuel with air in an internal combustion engine. In the modern world, automotive electronics play an important role in the manufacturing of any passenger car. This paper describes advanced electronic fuel injection system for small 4stroke vehicles. Principle and working of electronic fuel injection system.
Most intermittent faults are caused by faulty electrical connections or wiring. Principle of efi efi is an indirect, pressurized injection system with injectors operated by a solenoid. Conventional fuel injection system in twostroke engines. Pdf electronic fuel injection system electronic fuel. The functional objectives for fuel injection systems vary but all of them. Originally hated as computercontrolled carburetors, efi gained reliability in the 1980s and picked up performance in the 1990s. Pc common rail system 4th generation fie requirements evaluation sensitivity analysis of important injection parameters for the engine performance feature. The efi engines run more smoothly, with lower emissions and fuel consumption. Pressure pipe is connected to the injector solenoid valve. An electronic fuel injection system efi is a more complicated fuel system than a carbureted system. Electronic fuel injection systems for heavyduty engines. Fuel injection system an overview sciencedirect topics. All of the above analyzed pumpinline fuel injection systems.
Examples include the hydraulic electronic unit injector heui and the mechanically actuated electronically controlled meui systems by caterpillar, and a number of systems by cummins such as the accumulator pump system caps, quantum celect, hpi, and xpi injection systems. Electronic fuel injection systems hilborn fuel injection. Mechanical fuel injection bosch kjetronic, bosch k jetronic fig. The benefits of electronic fuel injection efi power4flight. An electronic fuel injection system was developed for a briggs. An efi system relies on injectors and a fuel pump to control fuel flow and to feed the engine. Efielectronic fuel injection systems at summit racing. The ecu uses this continuous flow of data to determine the appropriate injector pulse rate and throttle opening position. Many of them use a fuel pump essentially identical to the carbureted fuel systems. Poor mating of connector halves or terminals not fully seated in the. The fuel delivery system is responsible for fuel delivering at the engine.
A fuel pump sends the petrol to the engine bay, and it is then injected into the inlet manifold by an injector. A number of heavyduty diesel engine manufacturers have developed their own electronic fuel injection systems. 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. Electrostatic discharge damage electronic components used in control systems are often designed to carry very low voltage, and are very susceptible to damage caused by electrostatic discharge. 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. Its userfriendly software and easy function keys have allowed me to reach and pass my goals. 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. Electronic fuel injection system linkedin slideshare. Electronic fuel injection efi system explained merits. This injection system has been implemented in tvs 50. Common rail direct injection what is crdi technology. Advanced diesel electronic fuel injection and turbocharging. Electronic fuel injection seminar report, ppt, pdf for. Describe the operation of an electronic diesel fuelinjection system.
Part 2 fuel system operation fuel pump the electric fuel pump, located in front of the fuel. This research aimed to evaluate mainly on engineout emission of a single cylinder diesel engine on two conditions of fuel injection system. Take a technological leap forward with a new electronic fuel injection system from summit racing. The unit injection system integrates the injection pump and nozzle into a single module. Electronic fuel injection efi drove carburetors out of newcar production for good about a decade ago. Check out our complete catalogview flip catalogview. Fuel delivery system certain mechanical fuel injection systems also utilize a mechanical fuel pump, typically some early gasoline fuel injection systems.
When an intermittent fault is encountered, check suspect circuits for. In addition to this manual all special tools and test equipment as outlined herein are needed plus all service pertinent literature, the individual pump. Explain how to diagnose gasoline fuelinjection problems. Pdf sensors system,advanced fuel injection system,computer. Some, however, use a vane type fuel pump mounted directly to the injection pumpfuel distributor assembly. Explore electronic fuel injection with free download of seminar report and ppt in pdf and doc format.
Pdf advanced electronic fuel injection systems an emissions. Pdf this paper describes two advanced electronic fuel injection systems for small vehicles which have recently become commercially. Describe the operation of a diesel mechanical fuelinjection system. Yet we can actually trace efis roots back way before thento the systems developed by robert bosch in the late 60s and early 70s for volkswagen and other european carmakers. Advanced diesel common rail injection system for future. A servojet electronic fuel injection system was designed and manufactured for the cummins vta903 engine. Caution to reduce the chance of personal injury andor property damage, the following instructions must be carefully observed. Explain the differences between throttlebody,port and direct fuelinjection. An electronic control unit receives information in the form of electric signals from the sensors. The latter is the simpler of the 2 systems and controls the fuel rail to a constant pressure via a nonvacuum referenced regulator in the tank, which is typically set to 55 psi. Comparison of the fuel line pressure, injector needle lift and the in cylinder pressures of efi visavis mechanical fuel.
Fuel injection system functions and different parts. We carry many efi systems many selftuning and selflearningfrom the top players in engine performance, including msd ignition, edelbrock, holley, fast, accel, chevrolet performance, quick fuel, and more. Pdf development of an electronic fuel injection system for a 4. Banktobank electronic fuel injection engine management systems in the past three years of using the fast product formerly known as speedpro, there has not been a time where i wasnt a happy racer. Fi is a fuel injection system for small displacement motorcycle, and this. The system consists of a carb spacer plate with a fuel block and injector, an ecu, and a wide band o2 sensor. The following table is a guide to the fuel paths marked by each blue arrow in figure 6. 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. As with virtually any electronic system, intermittent faults in the abs system may be difficult to accurately diagnose.
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