While this article is primarily intended as a fuel injection article, it will include testing information for some components of the ignition and other systems related to the motronic system. Self study program 842003 motronic me 7 engine pdf download. This can be bad not only for getting the car started, but it can rust important parts if goes through the fu. As the engine is called as fuel stratified injection it have greater influence on vehicle operation and performance. An arrow on the filter body indicates the direction of fuel flow. Ignition coil, ignition module, ht leads and 4 x spark plugs. They have the potential to reduce fuel consumption by. 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. One of the first things we learn in our motorcycle safety course are the letters finec which is the sequence of processes for starting up a motorcycle. Volkswagen has used a variety of fuel injection systems in production vehicles for over 30 years.
Learn about the components of a direct injection engine at howstuffworks. Medmotronic system memotronic system mmotronic system. Find out about diesel fuel injectors, the diesel furl injection process and the variables that affect diesel fuel injection. How to start a motorcycle fuel injected or carbed instructables. Bosch efi fuel injection systems d l lh k ke hp books pdf 30 4 mb engine repair manuals english en. This version of the system was integrated with body control module and antitheft system. Components of a direct injection fuel system the components of a direct injection engine differ from gasoline engines. Motronic fuel injection system, servicing pdf free download. Today we provide technology for fuel supply, fuel injection, air management, ignition, engine control, and exhaustgas treatment as well as endtoend. Pdf development of an electronic fuel injection system.
If you are trying to start your car and it will crank, but refuses to fire up the engine, then you may have water in your gas tank. Ecu to earth pin 20 so that the fuel pump will run. Modern automobiles and trucks use a fuel injection system to deliver the correct air and fuel mixture to be burned in the engine cylinders. These systems have proven to be supremely reliable and efficient. Today, it has been superseded by gasoline injection systems which thanks to. Today, many of the vehicles being used in electronic systems is advantageous in. Some, however, use a vane type fuel pump mounted directly to the injection pump fuel distributor assembly. Motronic multiport fuel injection mfi and ignition system. This dives right into replacing a mechanical fuel injection system on a 1981 vw diesel rabbit with a 1. Motronic fuel injection system, servicing safety precautions if special testing equipment is required during road test, note the following. Inlet manifold vacuum is measured using a pressure sensor located in, or connected to the intake manifold, in order to calculate the duration of fuel injection pulses. Gasoline direct injection key technology for greater.
Connector 3 1 injector cyl 2 output 2 injector cyl 5 output 3 purge valve output 4 sai valve solenoid output lev only 5 not used 6 fuel tank. Introductionin olden vehicles carburetors are used in a fuel injection system that blends air and fuel for an internal combustion engine by using the bernoullis principle. For other components of the injection and ignition system repair group 24. Ignition and injection functions are also activated. Everyone knows that you put fuel into the tank to keep the car running. In the motronic systems the throttlevalve sensor generally assumes the function of a secondary load sensor, supplementing one of the primary load sensors listed above. Page 1 of motronic fuel injection system, servicing safety precautions if special testing equipment is required during road test, note the following.
Digital data processing and microprocessors make it possible. They have the potential to reduce fuel consumption by up to 15% compared to a similar engine with intake manifold injection. To control the amount of fuel supplied to each cylinder to. The gasoline engine management system electronically controls combustion parameters amounts of air and fuel and ignition timing to increase engine output and reduce emissions and fuel consumption. For information on servicing and repairing the ignition part of the motronic. It is also employed as a primary load sensor in some isolated cases. The fuel system consists of a fuel tank which is mounted under the rear of the car, with an electric fuel pump immersed in it, a fuel filter, fuel feed and return lines, and the throttle body assembly which incorporates the single fuel injector and the fuel pressure regulator. The marriage of ignition and fuel injection is a natural fit because they are completely reliant on each other for proper engine operation. The tension of four different rotational speed sensors. Electronically controlled mechanical fuel injection. The injection system may include emechanical fuel pump, the fuel fine. View topic k jetronic diagrams the mk1 golf owners club. The fuel system is vital in storing and delivering the gasoline, or diesel, that an engine needs to run. By controlling both major systems in a single unit, many aspects of the engines characteristics such as power, fuel economy, drivability, and emissions can be improved.
This modification will have several injectors depending on the number of cylinders. A relay switched voltage supply is thus made to ecu pin 37, from terminal 87 of the main fuel injection relay. Land rover fuel injection systems 74 motronic nonadjustable ecm is adaptive voltage range 0. Direct petrol injection system with bosch motronic. Fuel metering and ignition are optimally coordinated with one another. As for the rest of the system, i learned a lot from this excellent tutorial on troubleshooting the motronic.
Land rover fuel injection systems fuel system outputs 67 fuel filter return type systems external 19871999 mounted on the chassis, near the passengerside rear wheel arch. Jetronic controls fuel supply while the electronic ignition system provides optimal ignition control. Diesel fuel injection diesel fuel injection systems can be tricky. Electronic fuel injection efi replaced carburetors back as the preferred method for supplying air and fuel to engines. In addition, there is an electronic control unit ecu and. An air flow meter also measures the volume of air entering the induction system. Diagnostics and spare parts from a single source product. Porsche 911 motronic engine management system overview 911. The throttle body integrates other components that in the motronic system are scattered around the engine, like idling actuator and butterfly potentiometer, among other.
Classification of injection systems a fuelinjection syystem is required to inject and atomize fuel in to the cylinder of ci engines. Only components relating to the ignition system are covered in this repair group. When failures do arise, they are generally easy to diagnose. How to get water out of a fuel system it still runs. Motronic multiport fuel injection mfi and ignition system ignition system, servicing notes. Replace a mechanical fuel injection system on 1981 vw rabbit diesel bosch ve. Motronic multiport fuel injection mfi and ignition system component locations, overviewdata link connector dlc located under knee bar, left side of steering wheel fuel pump relay position 6 on relay panel in drivers side footwell oxygen sensor o2s behind three way catalytic converter twc g with. In this case, a portion of the fuel is fed directly into the working cylinder. Originally, this system was called jetronic, but the name djetronic was later created as a retronym to distinguish it from. Pdf gasoline engine management systems and components. It gives the clear idea about how to work a fuel injection system.
Fuel injection systems diesel ruimanuelvieirapinto 1090039 sistemas automoveis anolectivo20092010 fuel injectionsystemsdiesel 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 systemsconstantly changing and evolving from the 1930s to the present system, the fuel system, to power the vehicles engine performance, fuel consumption and emission reduction or environmentally significant improvements in terms become. Mmotronic system memotronic system medmotronic system. For producing the required pressure for atomizing the fuel either air or a mechanical means is used. Direct petrol injection system with bosch motronic med 7. Before disconnecting any fuel line, depressurise the fuel system. The injection function of the motronic system is based on the well tried l jetronic system, although a number of refinements have improved operation. The system is designed to optimize the performance and efficiency of the engine. The motronic engine control module j220 for the ignition and fuel injection system is. Separate mixtureformation and ignition systems deal with parts of the problem. Ljetronic system fuel flow n fuel is pumped up to fuel rail and excess returned to tank n because so much fuel is circulated, filter is quite large. Other optimized electronic functions can also be included.
Operation of the fuel injection ignition the bosch motronic me2. This video is the working principle animation of electronic fuel injection system. Motronic med 7 operating modes there are four operating modes with this engine because of large variation in the control action of injection and ignition. If test and measuring equipment is operated from the passenger seat, the person seated. F l jetronic electronic fuel injection only 530i 528i f motronic computerized with ignition 535i 528e n most modern fuel injection systems are computerized. The system is based on the kjetronic mechanical system, with the addition of an electrohydraulic actuator, essentially a fuel injector inline with the fuel return. Motronic med 7 direct petrol injection system will be used for the first time in the lupo fsi and golf fsi. Motronic multiport fuel injection mfi and ignition system ignition system, repairing notes. The fuel injection system operates under high pressure, therefore before any maintenance work is to.
Fuel delivery system certain mechanical fuel injection systems also utilize a mechanical fuel pump, typically some early gasoline fuel injection systems. Oct 14, 2014 separate mixtureformation and ignition systems deal with parts of the problem. Porsche 911 motronic engine management system overview. Mar 25, 2021 bosch monojetronic system the monojetronic and motronic injection systems motronjc many features similar to those of the bosch lvariants, but are quite different from them. Mar 20, 2021 the motronic system takes fuel injection one step further, and incorporates an engine management system that also controls the ignition system. Motronic engine management system opens up new dimensions in gasoline direct injection. Motronic fuel injection system, servicing motronic mfi, servicing for information on servicing and repairing the ignition part of the motronic system repair group 28 note. Test equipment must always be secured to the rear seat and operated from there by a second person. From the first djetronic systems of the 1968, to the most current motronic system for 2000 and beyond, each system has always been on the forefront of technology. In 1990 bosch motronic fuel injection replaced ljetronic on the spider and 164 models.
For the other components of the fuel injection and ignition system. This system combines fuel injection, highestquality mixture preparation and the correct ignition timing to provide mutual support over the entire range of operating. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on youtube. Djetronic 19671979 analogue fuel injection, d is from german. A computer controls the injection and ignition systems with reference to shared optimization criteria. In addition, the intake manifold is installed extra starting the nozzle is controlled by the signal of the thermal relay. System maintenance residual fuel pressure will remain in the system lines long after the vehicle is used. Motronic med 7 direct petrol injection system will be used for the first time in the lupo fsi and. Motronic manifold injection motronic combines an injection system and an ignition system for engine management. The system supports sequential fuel injection and waste spark ignition. Bosch launched gasoline direct injection in 1951 and has remained at the cutting edge of the technology ever since. The engine control unit ecu may be either analog or digital, and the system may or may not have closedloop lambda control.
By controlling both major systems in a single unit, many aspects of the engines characteristics such as power, fuel economy, drivability. Pdf development of an electronic fuel injection system for. Megasquirt gallery focused on ms2e and ms3 for the bmw e30. Between the years 1973 and 1995, the highly reliable, mechanical multipoint injection system kjetronic was installed as original equipment in seriesproduction vehicles. Modernizing the ljet or motronic fuel injection version. Torque detection the fuel system is divided into a lowpressure fuel system and a high pressure fuel system. Data link connector dlc component locations, overview. Each of the primary nozzles is controlled individually emanagement unit. Worm clamps 19871990 oring and fitting 1991 early 1999 nonreturn type system. Your fuel injector can become clogged up with deposits left behind from fuel and its additives. Bosch l jetronic fuel injection troubleshooting, maintenance.
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. Many of them use a fuel pump essentially identical to the carbureted fuel systems. The motronic ignition point and injection duration are jointly processed by the ecu so that the best moment for ignition and fuelling are determined for every operating condition. It uses the sequential multiport fuel injection system, which injects fuel into each intake port of the cylinder head. G 1552 and selecting the address word for the engine electronics. Pdf electronic fuel injection system electronic fuel. Motronic what is the motronic fuel injection system. Pdf investigation of fuel injection system of internal. The motronic engine control module ecm j220 for fuel injection and ignition is equipped with diagnostic trouble code dtc memory. The fuel injection system motronic is a combined system with distributed injection, i.
Vehicle makes models and variants known or believed to be using this vehicle system, required. Since then, fuel injectors have been the primary means of getting gasoline into the engine cylinder so it can combust and you can drive. 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. Motronic is the trade name given to a range of digital engine control units developed by robert bosch gmbh commonly known as bosch which combined control of fuel injection and ignition in a single unit. While the general operating principles are the same, motronic offers more precise control over fuel and ignition events. The work of electronic fuel injection system is to supply air fuel mixture of optimize ratio to the combustion chambers under different driving conditions. This is because the motronic system ties into a lot of things, ignition, emission, even the 535is automatic cabin temperature control. The fuel pump relay is fed from the main relay, it should have a split pair of green wires with a violet stripe running to the fuel pumps. Repair group 24 the fuel injection and ignition system control. Vw ljetronic fuel injection workshop manual author. Only the components which specifically relate to the ignition system are dealt with here.
But have you ever stopped to think about how the fuel gets from the fuel tank into your engine. Components of a direct injection fuel system howstuffworks. The last carburetorequipped car came off the assembly line in 1990. Vw ljetronic fuel injection workshop manual created date. Motronic multiport fuel injection mfi system, components. Although fuel systems vary depending on vehicle model, their func.
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