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. Since its introduction, the kjetronic gasolineinjection system has pro. Jonas schmitt vanished the sixty year search for missing men of world war ii wil s hyltonyamaha user guide instructionsgenirevolution mission answer guideinotes app manual guide2014 polaris. The l jetronic aod ils variants are electro nically controlled fuelinjection systems solenoidopersle files 1 lisa shearin 2002 northstar engine problems rajalakshmi engineering college lab manual for mca flat panel. Combined ignition system and luel injection system molfonlc. Monojetronic is an electronically controlled, lowpressure, singlepoint injection spi system for 4cylinder engines.
Bosch ljetronic and motronic fuel injection systems repair guide. Onsomeljetronic systems, the air temperature sen sor is visible in the air flow meter inlet. Gregs bosch l jetronic fuel injection idle adjustment, diagnostic and tune up page, latest revision sept. On the monojetronic the ignition is totally separate from the injection so no map sensor, but there is the vacuum advance to the distributor ot advance the spark on light throttle. Read pdf bosch jetronic repair manual,download ebooks bosch jetronic repair manual, download pdf bosch jetronic repair manual, download free bosch jetronic repair manual. Lets start by looking at how simple fuel injection is fuel fundamentals v p x t x a v volume of fuel through the injector p fuel pressure behind the injector t time the injector is open a area of the injector orifice cis kjetronic dme motronic afc ljetronic mpi djetronic. Technical manual l jetronic fuel injection system porsche 912e introduction to l jetronic fuel injection l jetronic fuel injection theory of operation l jetronic component identification operating conditions troubleshooting the porsche 912e fuel injection system component location system diagrams and reference tables bibliography. Fuel injection pumps bosch service repair workshop manuals. There are several variations of the technology offering technological development and refinement. This system combined ljetro injection pumps in 1912. 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. On the mono jetronic the ignition is totally separate from the injection so no map sensor, but there is the vacuum advance to the distributor ot advance the spark on light throttle.
This manual will describe the kjetronics function and its particular features. Gasoline fuelinjection system kjetronic bosch kjetronic service manual. This manual will describe the kjetronics function and its particu lar features. Specifically for my 1982 alfa romeo spider but this should work on any ljetronic or motroinic fule injection.
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. Mechanical fuel injection bosch k jetronic, bosch k jetronic fig. Benzinetank, pomp, filter, drukrege laar, verdeelbuis, injectoren en koude startinjector. Textbook, user guide pdf files on the internet quickly and easily.
This document is freely distributable in its original form. The lele2lu jetronic system is a development of the earlier bosch ljetronic fuel injection system. Gregs bosch ljetronic fuel injection idle adjustment, diagnostic and tune up page, latest revision sept. Bosch ljetronic fuel injection guide fiat fuel injected. Download bosch k jetronic service guide book pdf free download link or read online here in pdf. Download the book into available format new update.
Bosch le jetronic bmw copyright equiptech boschlejetronic thereismuchconfusionabouttheactualtypeofinjectionsystemfittedtomanybmwmotorcarsduringtheperiod1980to. K jetronic is a continuous injection system cis, which means that the fuel injectors receive and produce a constant flow of fuel, provided there is proper pressure, whenever the engine is running. 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. The l jetronic aod ils variants are electro nically controlled fuel injection systems solenoidopersle l jetronic in iha bosch technical instruclion series. Ljetronic the bosch ljetronic also called afcair flow controlled fuel injection was put into usspec type 4s in the last model year 1974. 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. Bosch ljetronic fuel injection troubleshooting, maintenance. A computer controls the injection and ignition systems with reference to shared optimization criteria. The ljetronic was the first massproduced, fully electronic fuel injection system. These early motronic systems integrated the spark timing element with thenexisting jetronic fuel injection technology. The bosch ljetronic fuel injection system is electronically controlled to regulate the fuel supply in relation to the air flow. Pdf application of hybrid ics to the automotive electronics market. Bosch l jetronic fuel injection troubleshooting, maintenance.
Ljetronic fuel injection technical troubleshooting article. This diagram was adapted from the porsche 912e workshop manual and has been enhanced to provide additional information to assist in isolating fuel injection problems. Between the years 1973 and 1995, the highly reliable, mechanical multipoint injection system kjetronic was installed as original equipment in seriesproduction vehicles. Bosch l jetronic l jetronic rx7 brought to you by the team at created date. 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. Vw ljetronic fuel injection workshop manual created date. Jetronic controls fuel supply while the electronic ignition system provides optimal ignition control. Vw l jetronic fuel injection workshop manual created date. Hookup the auxiliary fuel tank and fittings as shown on page 4. All books are in clear copy here, and all files are secure so dont worry about it. 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. While port injection systems such as ke and ljetronic employ a separate injector for each cylinder, monojetronic features a single, centrallylocated, solenoidcontrolled injection valve for the entire engine. The bosch le jetronic system is a multipoint injection system and pulses all. The following table is a guide to the fuel paths marked by each blue arrow in figure 6.
The bosch l jetronic fuel injection system is electronically controlled to regulate the fuel supply in relation to the air flow. This document concerns bmw vehicles equipped with le jetronic and we will now. Jetronic is a trade name of a fuel injection technology for automotive petrol engines, developed. Digital data processing and microprocessors make it possible to translate extensive operating. Continuous injection system found on european cars and volkswagen models assembled in the u. Today, it has been superseded by gasoline injection systems which thanks to. 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. If the inlet air temperature sensor fails its resistance tests, you cant service just the sensor. 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. Injection bosch motronic principe injection bosch m. The bosch djetronic electronic fuel injection system is composed of 3 major. Kjetronic is a mechanical fuel injection system developed by bosch in the 1970s and is used in a wide variety of vehicles around the world. Gasolineinjection systems overview 10 kejetronic system overview, advantages 12 fuel supply 14 fuel metering 18 adaptation to operating conditions 22 supplementary functions 33 electrical circuitry 36 workshop testing techniques 38 kejetronic since their introduction, the kejetronic systems have proved themselves in millions of automobiles. Onsomel jetronic systems, the air temperature sen sor is visible in the air flow meter inlet.
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. K jetronic friends of pdf all our visitors are our friends. May 04 2020 vwljetronicfuelinjectionworkshopmanual 15 pdf drive search and download pdf files for free. Between the years 1973 and 1995, the highly reliable, mechanical multipoint injection system k jetronic was installed as original equipment in seriesproduction vehicles.
Ljetronic 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. Fuel injection system the ke2jetronic fuel injection system is fitted to turbocharged engines. Vw ljetronic fuel injection workshop manual pdf yumpu. Bosch djetronic, ljetronic, lhjetronic, lhmotronic, kjetronic and kejetronic fuel injection systems. 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. Djetronic history and fundamentals history the djetronic system developed by bosch in the early 1960s was the first massproduction electronic fuel injection system. What links here related changes upload file special pages permanent link. Bmw engines all about the m50m52m54bosch motronic basic, motronic 1. Disconnect the return line from the distributor head 6a, and connect a hose from the distributor head outlet to the bottom of the auxiliary fuel tank 2a. The l jetronic aod ils variants are electro nically controlled fuelinjection systems solenoidopersle jetronic controls fuel supply while the electronic ignition system provides optimal ignition control. 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. Fuel injection fundamentals porsche club of america.
Ljetronic was often called airflow controlled afc injection to further separate it from. Variants of d jetronic were used by other manufacturers ford, toyota, etc. Its wide use throughout the industry justifies its coverage in this manual. Kjetronic is a continuous injection system cis, which means that the fuel injectors receive and produce a constant flow of fuel, provided there is proper pressure, whenever the engine is running. Bendix developed the basic idea of using an inductive element coupled to manifold vacuum as a. Thisis necessary due to the added complexity and increased power output of the engine, the system provides a higher degree of mixture strength control than that provided by the kjetronic system. Ljetronic was often called airflow controlled afc injection to further separate it from the pressurecontrolled djetronic with the l in its name. It was primarily based on patents that bosch licensed from the bendix corporation. The injection function of the motronic system is based on the well tried l jetronic system, although a number of refinements have improved operation. Bosch developed many more types of electronic fuel injection after d jetronic l jetronic, k jetronic, etc. This manual is designed to assist the technician unfamiliar with robert bosch fuel injection systems in locating faults in the ljetronic system, isolating.
Vw ljetronic fuel injection workshop manual author. K jetronic is a mechanical fuel injection system developed by bosch in the 1970s and is used in a wide variety of vehicles around the world. Technical manual ljetronic fuel injection system porsche 912e introduction to ljetronic fuel injection ljetronic fuel injection theory of operation ljetronic component identification operating conditions troubleshooting the porsche 912e fuel injection system component location system diagrams and reference tables bibliography. Gasoline fuel injection system mono jetronic pdf995 bitbin. L jetronic is the term used by bosch to describe a fuel injection system. Bosch licensed the concept to many automobile manufacturers. Vw l jetronic fuel injection workshop manual author. Page 20 l jetronic system diagram the next diagram is a schematic drawing of the complete l jetronics fuel injection system. Check the advance cartridge it fails and you get very flat performance and poor economy. Fuel injection system workshop service repair manual. Page 20 ljetronic system diagram the next diagram is a schematic drawing of the complete ljetronics fuel injection system.
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