The efii system is a complete electronic engine management system for lycoming engines. Engine usage available for consumer key on, engine not running. The following prepress solutions have been certified on the mercury rip architecture. It increases your uptime, saves you cash, reduces maintenance and starts so easy its hard to believe. Trace in blue the portion of the circuit below that could be at fault.
A fuel injector must spray fuel as a mist because its easier for your engine to burn. Electronic fuel injection system diagram and working. This makes the pump work loop of the engine cycle very small. Replace spark plugs and crank engine slowly to distribute oil. Corroded terminals or a weak battery, alternator or ignition system will not adversely affect your carburetor, but they will interfere with the precision functions of an efi system. An internal combustion engine ice is a kind of engine which produces work by a. During fuel injection into the engine compartment, turbulent flows occur, which. The high mount stop lamp does not work, but the stop lamps work fine. Gasoline engine efi electronic fuel injection fuel. This includes electronic fuel injection efi and high energy electronic ignition for all spark plugs. Feb 16, 2021 engine mechanics on a basic level fuel injection pumps take on a role similar to that of a carburetor.
Electronic fuel injection has become more and more common on smaller engines, and thats probably a good thing. It takes in all of the signals from the engine sensors to make cyclebycycle decisions on how much fuel and spark to provide the efi engine and when to do it. The ecu interprets this information and uses it to keep the car working. Efi system is a 12 vdc negative ground system, designed to operate down to a minimum of 6. The efii system is the same type of engine management that you would find on any modern automobile.
This means that the ecm primarily looks at the engine s speed and the intake manifolds air density in order to calculate the correct amount of fuel to inject. Multi point fuel injection or mpfi system working, advantages. You put engine into operation, turning a dial and changing various injection. Efi, or any fuel injection system, utilizes a special highpressure fuel deliver nozzle to inject an ultrafine mist of fuel into the engine. Trailblazer 325 gas or lp enginedriven welderac generator. Direct fuel injection was used in notable world war ii airplane en. If ignition is turned on and the engine is not started, after a period of time, the afr will start reading init until the sniper efi ecu sees an rpm signal. It includes everything youll need to get started tuning efi systems. View and download polaris 2007 sportsman x2 800 service manual online. The engine cooling system must have a working 140 f to 210 f thermostat. 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. The system shuts down the injectors intermittently in the event of an overheating engine in order for it to work cooler and therefore protect the head gaskets.
It has the ac compressor harness extended off the front drivers corner bottom right, the o2 sensor and oil level sensor harness extending off the front passengers corner bottom left, extends out of picture, the computer connection and interior green wiring connector left. Pdf on dec 31, 2017, abonyi sylvester e and others published performance of fuel. Kohler efi engines 26 and 28 hp save money by significantly reducing fuel consumption. This post will discuss what is electronic fuel injection system efi, its architecture, types, how it works, applications, advantages and disadvantages. This is true if your engine s malady is a carburetor that needs rebuilt or replaced, but efi is not a cureall for an engine that has problems. Installed the holley efi system about 6 weeks ago the only problem with the system is after i drive the car for say 30 minutes, turn off the engine then about 20 minutes later when i start to drive again it will not idle for a few seconds and i have to feather the throttle pedal to keep it running until it decides to run and idle on its on. Electronic fuel injection system electronic control unit instruction. Separation of the engine oil dipstick, oil filler cap, pcv hose, etc. Diesel fuel injector as installed in a man v8 diesel engine common rail.
Electronic fuel injection system efi architecture, types, applications. What i bolted on was the necessary parts from a 1989 fj62 using an engine harness from 1990. Basic diesel engine operationdiesel engine force air by the intake valve into the cylinder high compression ratio heats the air enough to ignite the fuelfuel is injected into the cylinder at high pressurethe amount of fuel injected suits to the load and controls engine speed. When you step on your gas pedal, your vehicles throttle valve which is a valve. Pdf performance of fuel electronic injection engine systems. The engines operation manual mentions that the correct propeller for your. Fuel injection resulted in torque and horsepower improvements at. Electronic fuel injection efi option uses up to 42 percent less fuel excel power option 2,400 watts 120 v, 20 a 60 hz pure sine power at all speeds battery chargecrank assist efi gasonly option battery charge 1224 v, 75 a crank assist 1224 v, 350 a with wire feeder. Pdf advanced electronic fuel injection systemsan emissions. With the mercury rip architecture, pdf print engine can scale up to drive highvolume production on a single press or across multiple presses. Uav28efi is a turnkey fuel injected engine system developed for small. A faulty efi system is often related to poor ly connected or corroded connectors.
Use our efi 24x and efi 58x product lines are the best to replace the troublesome lt1 optispark distributor. Electronic fuel injection efi is a highpressure fuel management system. Nov 23, 2015 a properly tuned efi system can disclose hidden problems your carburetor may have concealed. Trailblazer 302 trailblazer 275 dc processes description tig gtaw welding stick smaw welding mig gmaw welding flux cored fcaw engine driven welding generator. Pdf this paper describes two advanced electronic fuel injection systems for small vehicles which have recently become commercially available. Pdf electronic fuel injection system electronic fuel. C shows the basic principle of the two types of control. A07mh68ax, ay, az standard model only engine model.
Efi fuel system integrated product design built around offthe shelf automotive components. Efi contains engine sensors, a computer, and solenoid operated fuel injectors to meter and injects the right amount of fuel into the engine cylinders. For some reason, there are still people that think that efi can cure an improperlyrunning engine. The engine control module ecm constantly monitors and finetunes every single engine operating point thousands of times per minute. Standalone efi monitor software works through serial passthrough with any datalink. Please ensure you advise your repco authorised service centre if you are experiencing any particular fault or problem, as they are fully trained to carry out a complete efi service and restore your engine to its peak running condition using quality components from. In consumer tests, efi engines reduced fuel consumption by 25%30% compared to carbureted engines. Electronic fuel injection efi system explained merits and. Banktobank electronic fuel injection engine management. An electronic control unit uses sensors around the engine to deliver the precise amount of fuel the engine needs, improving response, efficiency and starting. Just like on todays cars, efi uses an onboard computer, injector nozzle and multiple sensors to to reliably deliver exactly the right amount of fuel to get the most performance and efficiency out of your engine.
Sportsman 700 efi general specifications category dimension capacity length 83 in. User manual for efi fuel systems pg engineered control. Once engine is started and closed loop is active, the afr should read close to the target afr in the handheld readouts. Direct injection system for a two stroke engine chalmers. The displacements of the engines can be in the range of 35cc up to 1200cc. Sometimes when you are tuning an engine that is already in a vehicle on a chassis dyno, a lot of strange things can happen that you should be aware of. Advanced speed governing with tps feedback advanced spark ignition timing for each fuel type. When disassembling the efi parts, note the location of the orings. Uses significantly less fuel than a carbureted engine, saving you time and cash at the pump.
Pink ignition wire must be connected to 12 volt switched ignition that receives power during crank and key on. This is a typical 19891993 mustang efi engine compartment wiring harness. For engines built before that time, or as a replacement, the incandescent mil is now listed in the accessories catalog under part no. If you want the adobe pdf print engine preferredoption in job properties to be selected by default for all pdf jobs, select use adobe pdfprint engine preferred for pdf jobs. Ken farrell of fitech let us know, make sure your surrounding systems are in good working order. While the auto industry has been enjoying the technology for decades, its not as common in smaller engines.
The fuel delivery system is responsible for fuel delivering at the engine. Fuel injection has recently become the main fuel delivery system used in automotive petrol engines. Change oil while engine is still warm from operation. Gasoline engine efi electronic fuel injection fuel system. The ecu interprets this information and uses it to keep the car working at its best. Once enabled in configure, a checkbox for adobe pdf print enginepreferred is available in job properties. Top brands like msd, flowmaster, hurst, accel and many more make up the industrys leading offering of enthusiastdriven products to deliver robust, complete performance solutions for builders, racers, and. It has now grown to 5 or more engine types and over 50 conversion kit options to suit your project. This kit replaces the oems carbureted fuel system completely, and it requires the minimum modifications of the engine. Oct 14, 2010 the efi system uses various sensors to detect the engine condition and vehicle running condition.
Please ensure you advise your repco authorised service centre if you are experiencing any particular fault or problem, as they are fully trained to carry out a complete efi service and restore your engine to its peak running condition using quality components from leading manufacturers such as aca, bosch, and injectronics. Mar 27, 2018 the electronic fuel injection system is a new innovation in gasoline engine, this system incorporates electronic computerizm to get the best fuel and air comparisons under all engine conditions. The center of the whole efi system, which controls the fuel map, is the engine control unit ecu. See the attached pdf file that contains print engine information as well as how to save a pdf out from a pc or mac for use with xfv6. It is important to determine if the misfire or lack of injector pulse is the result of an ecm strategy to save the engine from damage or an actual malfunction. Ecv630ecv749, cv735, cv26, cv745 service manual kohler engines. Once it finds what it likes, it tells the injector to remain open and spraying fuel for a given length of time. It is possible to receive this code if the engine has severely overheated above 280 f. Electronic fuel injection system efi architecture, types. This may occur if the temperature is below 30f or if the cts sensor is unplugged. Application of an electronic fuel injection system to a single.
Use our efi 24x and efi 58x product lines are the best to. And the engines exceed carbepa and international requirements for exhaust emissions. Im going to describe here what i did and the steps taken to make the conversion from carburetor to 3fe efi. Upon selecting the marine efi menu choice, the scan tool will establish communication with the engine s electronic control module ecm and automatically determine the type of module that is present. However, the efi system does not equip with carburetor. Jun 26, 2009 engine compartment and computer wiring. Closedloop electronic fuel injection control of the. The engine requires an airfuel mixture of approximately 14. Since then, fuel injectors have been the primary means of getting gasoline into the engine cylinder so it can combust and you can drive. Efi does exactly what it sounds like it injects fuel directly into an engine s manifold or cylinder using electronic controls. And the engine ecu calculates at the optimum fuel injection volume, and causes the injectors to inject the fuel. Mercruiser horn warning systems page 4 10 90898301003 june 2007 1995current 5. A carburetor is a device that blends air and fuel for an internal combustion engine.
If part replacement is necessary, the part must be replaced with one of the same part number or with an equivalent part. Fuel tank function is to contain of gasoline as a source of power from the vehicle. Electronic fuel injection efi system uses electrical and electronic devices to monitor and control engine operation. Rather than using a carburetor, which mixes fuel and air through a system of valves, a venturi tube, and suction, efi injects fuel directly into either the engine manifold or the cylinder. The stop lights do not work, but the high mount stop lamp works. Setting both to the adobe postscript 3 engine is an additional option. The last carburetorequipped car came off the assembly line in 1990.
Oct 28, 2009 all electronic fuel injection systems work in essentially the same way. The computer then compares that data to a stored map of fueling requirements. This course is designed to dispel the myths associated with electronic fuel injection. The basic principle of all carburettor design that when air flows over the end of a narrow. Banktobank engine management systems the fast banktobank system is the enthusiasts choice for an easy and affordable efi installation.
Trace in green the portion of the circuit below that could be at fault. Before working on engine or equipment, disable engine as follows. Check to make sure your check engine light is not on, or that it is on with the key on but the engine is not running. Find out how fuelinjection systems work and about the various configurations used in the cars today. Engine displacement 459cc engine type electronic fuel injection efi engine rpm 3600 recommended oil 10w30 sae 30 oil capacity qt l 1. Disconnection, looseness or cracks in the parts of the air induction system between the throttle body and cylinder head will cause air suction and cause the engine to run out of tune. The engineering and science behind how engines work can be fairly complicated, but on a very basic level their main purpose is to take a fuel, usually petroleum gasoline or diesel, and convert it into energy that can be harnessed to produce motion. Efi h 9 check engine bat 2 31c 15a dome ig 15a ig2 84a b1 c2 wb k gr 4 ac2 2 3g a22a, c1b a 3 21 o w psb 14 water temp. If you have any questions about this system or instruction manual, please contuct.
Certified to meet epacarb 2004 offroad large spark ignition engine emission requirements. In 2008, we pioneered one crank and cam signal solution for an engine to use the popular lsseries electronics. Electronic fuel injection replaces the need for a carburetor that mixes and fuel. Command pro enhance your performance with electronic. Fuel injection system for ci engines the function of a fuel.
The service procedures recommended and described in this service manual are effective meth. Jan 01, 1970 that work continues today through holleys marketleading efi products as well as through holleys family of bestinindustry brands. Efi engine managment manual pg engineered control solutions. Carburetors are good for performance, but due to their vague nature, they cant make great horsepower, get solid gas mileage, and pass an emission test, all with the same tune, they also had many mechanical parts that could become gummy over period. Outboard efi engines operate on the fuel injection strategy called speeddensity. Before disconnecting the fuel hose, release the fuel pressure. If system voltage drops below this level, operation of voltage sensitive components such as ecu, fuel pump, ignition coils, and injectors will be intermittent or disrupted, causing erratic operation or hard starting. Sensors located in the engine and throughout the rest of the vehicle send information to the ecu. All electronic fuel injection systems work in essentially the same way. The function of a fuel injection system is to meter the appropriate quantity of fuel for the given engine speed and load to each cylinder, each cycle, and inject that fuel at the. The efi system basically has the same diagrams as conventional fuel systems. Model issues regarding modification of fuel injector.
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