Highpressure fuel is supplied to the fuel injector by the fuel pump. Electronic fuel injection system diesel engine keywords. Originally hated as computercontrolled carburetors, efi gained reliability in the 1980s and picked up performance in the 1990s. Principle and working of electronic fuel injection system. Fuel quality contamination i have been involved with diesel fuel injection all my working life and still find the topic of fuel and solutions controversial. The efi engines run more smoothly, with lower emissions and fuel consumption. Engine control module ecm brain of the electronic fuel.
Engine type electronic fuel injection efi engine rpm 3600 recommended oil 10w30 sae 30 oil capacity qt l 1. 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. Troubleshooting guide for diesel fuel injection systems with bosch inline fuel injection pumps tank empty or tank vent blocked fill tankbleed system, check tank vent. Vw ve pump diagnostic troubleshooting hard start insufficient fuel supply, replace fuel filter one or more glow plugs bad or not getting power worn drive shaft support bushings in pump from over tightened timing belt water in fuel air leaks on suction side of fuel system injection pump needs. Closedloop electronic fuel injection 20amp charging, regulated yellow oil cap and dipstick large filters air, oil, fuel hardened crank journals pto sideload sleeve bearing hydraulic valve lifters 12volt solenoid shift electric start dualelement air cleaner dual oil drains electronic ignition solenoid fuel shutdown oil sentry automatic.
Harley davidson delphi fuel injection problems part 1. Unit which interprets data from sensors that monitor the vital parts of the. These factors are based on the actual conditions and on the desired conditions at any given time during starting and operation. Engine acceleration or response poor cranking fuel pressure is low engine operating fuel pressure is low engine decelerates slowly. On diesel engines, fuel injection is a necessity, whilst on petrol engines fuel injection is.
Airfuel management as well as engine operational functions are performed by an embedded electronic control unit ecu. The fuel tank breather can sometimes be blocked causing a vacuum in the tank which in turn draws the fuel back to the tank. Fuel injection electronic gasoline fuelinjection systems from the mid 1970s to the mid 1990s and later are all very similar in design and operation because they share a common beginning with robert bosch gmbh, a german company. Efielectronic fuel injection systems at summit racing. Fuel pressure should be a constant 10 15 psi on a tbi fuel injection system and is typically around 12 psi. Principle of efi efi is an indirect, pressurized injection system with injectors operated by. Some of these are in our stalling nonstarting repair page. The efi system uses various sensors to detect the engine condition and vehicle running condition. Efielectronic ignition k100 2v troubleshooting disclaimer. Hondas programmed fuel injection pgmfi systems consist of three subsystems. This video is the working principle animation of electronic fuel injection system.
It gives the clear idea about how to work a fuel injection system. Advanced diesel electronic fuel injection and turbocharging. Installing a good ecu while a problem still exists elsewhere in the system. 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. Some of the vehicles are equipped with a multipoint type injection and others available in 198891 may be equipped with a dualpoint injection system. User manual for efi fuel systems pg engineered control. Modern automobiles use electronic fuel injection efi in their fuel delivery system in order to increase the efficiency. The ecm determines the timing, the injection pressure, and the amount of fuel that is delivered to each cylinder. Many of them use a fuel pump essentially identical to the carbureted fuel systems. Electronic fuel injection efi drove carburetors out of newcar production for good about a decade ago. Table of contents page contact list 3 engine management system overview 4 a ecm system components 7.
Todays impressively powerful vehicles are possible through direct fuel injection. To help our customers shop hasslefree, we have categorized our products. Engine performance troubleshooting tree cm554 electronic control system with caps fuel system this troubleshooting procedure should be followed for the following symptoms. Troubleshooting the fuelinjection system in the ford ranger can be a daunting task. Air in fuel system bleed fuel system, eliminate air leaks shut offstart device defective repair or replace fuel filter blocked. Electronic fuel injection is a great means of delivering fuel to an engine. This system consists of the unit injectors, fuel manifolds, electronic pressure regulator, high pressure fuel pump, electronic control unit, wiring harness, and engine sensors. 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. Introduction to fuel injection common service manual.
View online or download mercury 150 efi service manual. The problem with such constantflow mechanical injection systems is that the. Higher pressure than 15 psi indicates that there is. The lift pump produces a positive pressure, but of more importance, a solid column of fuel at the inlet of the injection pump. Electronic fuel injection system diesel engine author. We show you how to diagnose and repair your harley davidson motorcycles delphi fuel injection system when you have stalling problems from loss of fuel pressure. Afc fuel injection types 1 and 2 from november, 1974. This design delivers the fuel into the air flow stream in the plenum similar to a carburetor. Between the years 1973 and 1995, the highly reliable, mechanical multipoint injection system kjetronic was installed as original equipment in seriesproduction vehicles. Gasoline engine efi electronic fuel injection fuel. Bosch is the largest supplier of fuelinjection systems in the world. Always check to insure that you have the proper fuel pressure. Certain mechanical fuel injection systems also utilize a mechanical fuel pump, typically some early gasoline fuel injection systems.
Take a technological leap forward with a new electronic fuel injection system from summit racing. User manual for efi fuel systems pg engineered control solutions. Troubleshooting guide for engines with electronic fuel injection. Fuel pressure is critical to the operation of a fuel injection system. Part no 4790227 gb troubleshooting guide preliminary. 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. A servojet electronic fuel injection system was designed and manufactured for the cummins vta903 engine. Electronic fuel injection seminar report, ppt, pdf for. The bosch djetronic electronic fuel injection system is composed of 3 major. Electronic fuel injection efi is interesting tech, critical to the performance of a modern engine. If equipped with a fuel supply pump check for minimum of 23 psi fuel supply pump pressure. Troubleshooting guide for diesel fuel injection systems.
The efi is controlled by the ecu electronic control. Afc fuel injection training and troubleshooting manual. Troubleshooting cars with electronic ignition and fuel. The electronic control module ecm, or electronic control unit ecu, is a small. Shop for affordable electronic fuel injection systems developed using oemlevel components, walkthrough fitech fuel injection. I am not a professional but only a k100 enthusiast with good knowledge of the bike.
Its the most universal type of electronic fuel injection system, but its not ideal for high performance engines. Pdf sensors system,advanced fuel injection system,computer. Understanding how the system functions makes this system easier to diagnose and repair. Mixing fuel this way allows for it to puddle and condense in the plenum of the intake manifold, a. Most of the information contained is this document was not available anywhere on. And the engine ecu calculates at the optimum fuel injection volume, and causes the injectors to inject the fuel. Today, it has been superseded by gasoline injection systems which thanks to. Pdf advanced electronic fuel injection systemsan emissions. Chrysler cars with fuel injection all have electronic ignition which became standard in the mid1970s across the line. Where a carburetor uses mechanical methods to provide the required fueling, the fuel injection system relies on a set of sensors and a computer to calculate and deliver the fuel needs. Pdf automobile engineering report on electronic fuel. Our framemount inline pump kit comes with the fuel pump and many items. Injector nozzle breakage and leakage problems were solved. Some, however, use a vane type fuel pump mounted directly to the injection pumpfuel distributor assembly.
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