L jetronic system air mass measurement n fuel injection system has to know mass of air n airflow meter provides air mass flow information u mass is calculated by volume flow and density f need device to determine flow air flap on airflow meter f need temperature to determine density temperature sensor in air flow meter afm 1 throttle plate 2 air flow meter with. Description the bosch djetronic electronic fuel injection system is composed of 3 major subsystems. Ljetronic electronic fuel injection only 530i 528i. Ke3 jetronic pdf mercedes suggests that special tools are required to adjust the mixture on the bosch ke3 jetronic. You should understand this fuel injection system before you begin working. Youmayassociate offidle hesitationwithdjetronic, but its not uncommon for a misadjusted throttle switch to cause the same problem on ljet systems. Vw l jetronic fuel injection workshop manual created date. The bosch l jetronic fuel injection system used in the porsche 912e is often referred to as the air flow controlled or afc fuel injection system.
Bosch mono jetronic manual pdf epub conorjaylon since this point, the kjetronic has now become particularly impor tant. Lele2lu a 010902021 9705 3 system description system description general the lele2lu jetronic system is a development of the earlier bosch ljetronic fuel injection system. Bosch l jetronic fuel injection troubleshooting, maintenance. Jetronic manual pdf epub you want, because bosch mono jetronic manual pdf epub pdf is limited edition and the best seller in the years. Le is the german designation of the european version of their air flow meter, with lu being the designation. Report elba fiat bosch lejetronic please fill this form, we will try to respond as soon as possible. Detach the operational relay set from the relay block as well as from the safety. Wise people, i have scoured the internet and a few libraries for a circuit diagram of a bosch le2 or lu2 jetronic ecu circuit diagram without success. Bosch ke jetronic manual bosch kjetronic service manual bosch k jetronic manual mercedes bosch ke jetronic workshop manual bosch d jetronic fuel injection manual manual kjetronic l jetronic kjetronic le jetronic kjetronic deutsch kjetronic german bosch manual bosch manual she bosch fsa 740 using. Bosch ljetronic fuel injection troubleshooting, maintenance. Either bosch le or le2 may be fitted to bmw vehicles that.
The ljetronic was the first massproduced, fully electronic fuel injection system. Both 4 and 6 cylinder engines use le jetronic, with a number of minor differences between applications. Ljetronic fuel injection system the ljetronic is an electronically controlled fuel injection system which has the advantage of direct air flow sensing. In 1975 opel owners did get the initial older l jetronic. Elementary ljetronic, two lifewithlis morethanjust enginebackfire and damaged air flow sensors. Bosch le lu jetronic injection air flow meter cross. Bosch le jetronic bmw copyright equiptech boschlejetronic thereismuchconfusionabouttheactualtypeofinjectionsystemfittedtomanybmwmotorcarsduringtheperiod1980to. Read online bosch k jetronic service guide book pdf free download link book now. Combined ignition system and luel injection system molfonlc. Jun 27, 2016 but i belive and now my hypotesis starts, that if bosch manufactured l le jets for various vehicles, that the core of those units was the same. Ljetronic fuel injection technical troubleshooting article. Download bosch k jetronic service guide book pdf free download link or read online here in pdf. Bosch ke jetronic manual bosch k jetronic service manual bosch k jetronic manual mercedes bosch ke jetronic workshop manual bosch d jetronic fuel injection manual manual k jetronic l jetronic k jetronic le jetronic k jetronic deutsch k jetronic german bosch manual bosch manual she bosch fsa 740 using manual bosch freezer manual bosch.
The djetronic system uses constant fuel pressure and flow, so that only injection duration needs to be modified to control airfuel mixture. Bosch le2lu2 jetronic circuit cr4 discussion thread. Le is the german designation of the european version of their air flow meter, with lu being the designation of the us version, i. System overview 18 fuel system 20 operatingdata acquisition 28 operatingdata processing 38 operating conditions 42 integrated diagnosis 58 electronic control unit ecu 62 interfaces to other systems 64 mmotronic engine management modern electronics are opening up new perspectives in automotive design. The following table is a guide to the fuel paths marked by each blue arrow in figure 6. We have made it easy for you to find a pdf ebooks without any digging. The task of a fuel injection system is to supply precise amount of fuel to the combustion chamber at that particular moment.
In this unit the single pcb is surface mount on one side and leaded components on the other including two or three proprietry thick film hybrid modules. Description download elba fiat bosch lejetronic comments. The lejetronic system is electronically commanded and injects the fuel in the intake manifold. While new carburated engines were used in the european markets, vw adapted the ljetronic for the type 4 in the us due to more stringent emissions and fuel consumption regulations. After a few days, you receive the repaired airflow sensor which is covered by the bosch exchange parts warranty. The lejetronic command unit receives various input signals, from the various sensors that send precise information about the instant engine operation conditions. Jetronic controls fuel supply while the electronic ignition system provides optimal ignition control. Vw l jetronic fuel injection workshop manual author. Do you like to read and collect bosch mono jetronic manual pdf epub. Ljetronic system air mass measurement n fuel injection system has to know mass of air n airflow meter provides air mass flow information u mass is calculated by volume flow and density f need device to determine flow air flap on airflow meter f need temperature to determine density temperature sensor in air flow meter afm 1 throttle plate 2 air flow. Gregs bosch ljetronic fuel injection idle adjustment, diagnostic and tune up page, latest revision sept. 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. The l jetronic aod ils variants are electro nically controlled fuelinjection systems solenoidopersle jetronic in iha bosch technical instruclion series.
In 1975 opel owners did get the initial older ljetronic. Description download elba fiat bosch le jetronic comments. Originally, volkswagen adapted the l jetronic for the type 4 air cooled 411 engines sold in the united states due to more stringent emissions and fuel consumption regulations. Ljetronic the bosch ljetronic also called afcair flow controlled fuel injection was put into usspec type 4s in the last model year 1974. Bosch le lu jetronic injection air flow meter cross references part 2 le injection was used on opel 2. The airflow sensor is therefore a functional component of the kjetronic. Now let us have a look how bosch ke jetronic fuel injection system can be diagnosed and repaired on an example of audi 100 2. Obviously us opel owners never saw it as opel quit importing in 1975. The l jetronic aod ils variants are electro nically controlled fuelinjection systems solenoidopersle lele2lu jetronic system is a development of the earlier bosch ljetronic fuel injection system. L jetronic system fuel injectors n open when energized by ecu not continuous as k jetronic. The bosch d jetronic is an electronical gasoline injection system which was introduced in 1967.
Before troubleshooting, testing or adjusting the k jetronic fuel injection system, the ignition system and the mechanical system of the engine compression, valve timing, etc. Ljetronic fuel injection systems for bmw e12s first fives. A thorough understanding of the various components is required before working on k jetronic fuel systems. This seminar will describe the ljetronic system fitted on. The analogue brains primary function was to take readings from the air flow meter, and to control the fuel injection accordingly. The injection has as function to provide the amount of fuel exactly.
But i belive and now my hypotesis starts, that if bosch manufactured llejets for various vehicles, that the core of those units was the same. The fuel filter due to the extremely fine tolerances within the bosch k jetronic system, it is vital that the filter has excellent filtration. Lejetronic was the first engine management system for the e30 to feature an ecu. With the help of the electronic control unit a more precisive fuel metering is possible compared to conventional carburetors so that the more stringent emission standards could be matched. Breitling bentley special edition, british planning 50 years of urban and regional policy, and many other ebooks. Examples home mechanical fuel injection volvo owners club. Prior to ljetronic, mechanical fuel injection systems had proven that directly.
In 2012 bosch had already produced five times as many high pressure injection valves and pumps as in 2010. Report elba fiat bosch le jetronic please fill this form, we will try to. This manual can be viewed on any computer, as well as zoomed and printed, makes it easy to diagnose and repair problems with your machines electrical system. Mar 24, 2016 the l jetronic is an electronically controlled fuel injection system which has the advantage of direct air flow sensing. 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. Dec 28, 2016 bosch k jetronic cis explained duration. Bosch ljetronic l jetronic rx7 brought to you by the team at created date. All books are in clear copy here, and all files are secure so dont worry about it.
Bosch l jetronic l jetronic rx7 brought to you by the team at created date. The bosch d jetronic is an analog electronic control unit ecu developed in the sixties, when microprocessors were not jet available for general use, but this is not to say that the complex calculations crunched digitally by screaming fast arithmetic logic units alu of todays injection ecus, were not perfectly capable of being processed by. Jetronic is a trade name of a fuel injection technology for automotive petrol engines, developed and marketed by robert bosch gmbh from the 1960s onwards. K jetronic system overview fuel supply 14 fuel metering 18 adapting to operating conditions 24 supplementary functions 30 exhaustgas treatment 32 electrical circuitry 36 workshop testing techniques 38 k jetronic since its introduction, the k jetronic gasolineinjection system has proved itself in millions of vehicles. A computer controls the injection and ignition systems with reference to shared optimization criteria. Since remakes are not always economically feasible, airflow meters that are sent to us are assessed in the bosch plant and refurbished if necessary. Robert bosch ljetronic efi system using mostly common workshop tools. The ezk spark control is the system master, if engine rotation signals are not provided to the ezk, spark will not be generated and the ezk will not provide a turnon signal to the lh jetronic fuel injection system. Way more information than you ever wanted on how to fell a tree. There are several variations of the technology offering technological development and refinement.
Bosch licensed the concept to many automobile manufacturers. Detach the operational relay set from the relay block as well as from the safety appliance located under the steering tube. Ac switch system relay pressure regu lator fuel distribution. Then, the command unit processes this information received and calculate the appropriate fuel injection time, through an electric signal. Digital data processing and microprocessors make it possible to translate extensive operating. The le jetronic command unit receives various input signals, from the various sensors that send precise information about the instant engine operation conditions.
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