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. Swipe leftright or hover and click arrows to access all 6 images. This air mass meter is called hlm2 hitzdrahtluftmassenmesser 2 by bosch. Engine and obd diagnostic codes faq home volvo maintenance faq for 7xx9xx90 cars fuel injection and ignition diagnostic procedures in lhjetronic 2.
Jetronic is a trade name of a fuel injection technology for automotive petrol engines, developed and marketed by robert bosch gmbh from. The actual injected fuel quantity is regulated by controlling the injectors opening time with the pressureloss gradient through the valve being taken into account in calculations as a known quantity. I am writing this article specifically from the point of view of a u. This page was last edited on 30 novemberat sequential fuel injection and knock control. Ljetronic, lhjetronic, and motronicasanintegratedenginemanagement system. Ljetronic fuel injection technical troubleshooting article. Ljetronic principle with electronic mapcontrolled ignition. 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.
Fuel injection fundamentals porsche club of america. Our bosch fuel injection pumps workshop manuals contain indepth maintenance, service and repair information. 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. Feb 12, 2019 bosch digifant engine management system jetronic motronic. The l jetronic aod ils variants are electro nically controlled fuelinjection systems solenoidopersle jetronic when the engine is cold. All technical details taken directly from the manufacturer can be found in this manual bosch handbook k d l lh jetronic fuel injection. This success is a result of the advantages which fuel injection can offer when considering todays demands for economy, performance, and cleaner exhausts. The warmup regulator, also called the control pressure regulator, lowers the control pressure of the kjetronic when the engine is cold. Now let us have a look how bosch kejetronic fuel injection system can be diagnosed and repaired on an example of audi 100 2. B 230 f gasoline engine with fuel injection and cataly tic con erter system. Having recently sorted out a problem with mine, and hopefully understanding its.
Do you like to read and collect bosch mono jetronic manual pdf epub. L jetronic le jetronic kjetronic kjetronic deutsch kjetronic german manual kjetronic bosch ke jetronic manual bosch ke jetronic workshop manual bosch kjetronic service manual bosch k jetronic manual mercedes bosch d. It combines the l jetronic principle with electronic mapcontrolled ignition. It features a lambda probe aggregated to the injection system, installed in the exhaust pipe.
D jetronic fuel injection system is neither nuclear science nor magic, it is a simple system. L jetronic system throttle and idle control n throttle opens to allow more air to sucked in to engine n small amount of air bypasses the throttle so the engine gets air and will idle. Gregs bosch ljetronic fuel injection idle adjustment, diagnostic and tune up page, latest revision sept. We also repair other automotive control module types. 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. Ljetronic the bosch ljetronic also called afcair flow controlled fuel injection was put into usspec type 4s in the last model year 1974. Luftmassehitzdraht the hotwire anemometer technology used to determine the mass of air into the engine. We specialize in lhjetronic fuel injection and mass airflow meter maf repair. The lhjetronic was mostly used by scandinavian car manufacturers, and by sports and luxury. Ipd 108663 fuel pump relay 19821984 240 nonturbo with lhjetronic volvo 48657 0332209158. Since this point, the kjetronic has now become particularly important with regard to. The following table is a guide to the fuel paths marked by each blue arrow in figure 6. 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. 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.
Bosch djetronic, ljetronic, lhjetronic, lhmotronic, kjetronic and kejetronic fuel injection systems. A thorough understanding of the various components is required before working on k jetronic fuel systems. Jetronic, lhjetronic, and motronic as an integrated engine management system. Earlier volvo engine management systems had separate control units for fuel and spark. Originally, volkswagen adapted the ljetronic for the type 4 air cooled 411 engines sold in the united states due to more.
Mechanical fuel injection bosch k jetronic, bosch k jetronic fig. This little goody is a common culprit in kjet or cis problems, along with pumps, oneway valves, accumulators and fuel distributors. Detach the operational relay set from the relay block as well as from the safety appliance located under the steering tube. Diagnostics and spare parts from a single source product. Mar 24, 2016 the l jetronic is an electronically controlled fuel injection system which has the advantage of direct air flow sensing. This further deflects the control plunger in the fuel distributor and correspondingly supplies additional fuel.
Playing with your k jetronic warm up regulator, or wur. Bosch l jetronic l jetronic rx7 brought to you by the team at created date. 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. Bosch digifant engine management system jetronic motronic. Bosch handbook k d l lh jetronic fuel injection emissions certainly, there are many manual sellers in this area. This manual bosch handbook k d l lh jetronic fuel injection emissions technical instruction is suited for people who are interested in the technical details of this brand. Stefan aachen hebrews nt wright for everyone bible study guidesmaytag mhw5500fc 4 5 cu ft front load washer with freshred cross wsi manualjurnal penyakit jantung koroner dftoseland and. The task of a fuel injection system is to supply precise amount of fuel to the combustion chamber at that particular moment.
It combines the ljetronic principle with electronic mapcontrolled ignition. The warmup regulator is installed on the engine to absorb its heat. Continuous injection system found on european cars and volkswagen models assembled in the u. The bosch lhjetronic electronic fuel injection system became available on the b21flh engine in 1982 and on the b23flh in 1983. The first microprocessor in an automobile 1981 lhjetronic market launch.
Get free l jetronic workshop manual saab l jetronic workshop manual saab if you ally compulsion such a referred l jetronic workshop manual saab books that will have the funds for you worth, get the extremely best seller from us currently from several preferred authors. It differentiates from the lejetronic for having, in addition to the injection system, also the ignition system incorporated in the command unit. The first microprocessor in an automobile 1981 lh jetronic market launch. 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. Bosch ke3 jetronic 539 89 injection system manual 328 mondial to read online or download as pdf. Download file pdf bosch mono jetronic a2 2 manual the wire in the air mass sensor. Since their introduction, the jetronic fuel injection systems have proved themselves millions of times over under the harsh conditions of everyday driving.
The bosch lhjetronic electronic fuel injection system became available on the b21flh engine in 1982 and on the b23flh in. Bosch is a trusted source by many vehicle manufacturers, including volvo, and others for their superior quality to other oem suppliers and their long history or. The complete system contains the following components. Ljetronic electronic control unit ecu, airflow sensor, system relay, fuel pump relay, lambdasond oxygen sensor, vacuum switch, electric fuel pump, coolant. By being a smart visitor and when you come to our website you can read and download. 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. 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. Lhjetronic 19821998 digital fuel injection, introduced for california bound 1982 volvo 240 models. Fuel injection pumps bosch service repair workshop manuals. Gtv6 and milano, however if you own any car with bosch ljetronic injection the. Bmw engines all about the m50m52m54bosch motronic basic, motronic 1.
In this system, the injection command unit controls only the fuel system. B 230 f gasoline engine with fuel injection and cataly tic. The digital processing of numerous engine functions made this system unique. Fuel pump relay 19821984 240 nonturbo with lhjetronic. There is so much mystery surrounding the cis continuous injection system fuel system bosch has dubbed k jetronic, i wanted to try and make some sense of it for all porsche owners.
An air flow meter, located in the air intake chamber, converts angular movement of an air baffle plate into a voltage signal, which is sent to the control unit. In the le jetronic system, the injection valves spray the fuel simultaneously, what is to say, they are all driven at the same time. Bosch mono jetronic the fiat forum jetronic is a trade name of a fuel injection technology for. 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. How can i tell which version of bosch lh fuel injection is on. Bosch ljetronic l jetronic rx7 brought to you by the team at created date. Bosch licensed the concept to many automobile manufacturers. The bosch l jetronic fuel injection system is electronically controlled to regulate the fuel supply in relation to the air flow. These early motronic systems integrated the spark timing element with thenexisting jetronic fuel injection technology. The bosch lh jetronic electronic fuel injection system became available on the b21f lh engine in 1982 and on the b23f lh in 1983. It can be downloaded immediately without impediments in download. Bookmark file pdf bosch mono jetronic a2 2 manual temp sensor has 2. Bosch technical instruction l jetronic pdf manufactured by the company bosch presented for you in electronic format page size 586 x 829 pts rotated 0 degrees.
Ac switch system relay pressure regu lator fuel distribution. By club member john hall, who worked for volvo usa for many years. Today, it has been superseded by gasoline injection systems which thanks to electronics have been vastly improved and expanded in their functions. There are several variations of the technology offering technological development and refinement. Ljetronic fuel injection system the ljetronic is an electronically controlled fuel injection system which has the advantage of direct air flow sensing. The bosch ljetronic and lhjetronic luftmassenmesser hitzdraht is a pulsed injection type system. But please do not start to doubt their performance before you checked all prerequisites. Bosch handbook k d l lh jetronic fuel injection emissions technical instruction manual pdf download, bosch handbook k d l lh jetronic fuel injection emissions technical instruction factory repair manual, bosch handbook k d l lh. Bosch ljetronic and motronic fuel injection systems repair guide. Bosch handbook k d l lh jetronic fuel injection emissions. 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. The lejetronic system is analog, and therefore it does not keep in memory possible damage that may occur. In the lejetronic system, the injection valves spray the fuel simultaneously, what is to say, they are all driven at the same time.
The le jetronic system is analog, and therefore it does not keep in memory possible damage that may occur. Vw l jetronic fuel injection workshop manual author. Engine and obd diagnostic codes faq home volvo maintenance faq for 7xx9xx90 cars fuel injection and ignition diagnostic procedures in lh jetronic 2. Bosch l jetronic fuel injection troubleshooting, maintenance. The bosch singlepoint injection systems are called. Another excellent source of general info on the bosch injection system from the early d jetronic electronic to k jetronic mechanical constant injection all the way to the later variations of the motronic engine management with lambda exhaust sensing to allow the system to function closedloop, is the book.
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