The ongoing development of the control unit and the sensors has led from the d jetronic to the ljetronic, and resulted in this fuelinjection system becoming. While new carburated engines were used in the european markets, vw adapted the l jetronic for the type 4 in the us due to more stringent emissions and fuel consumption regulations. Bosch ljetronic and motronic fuel injection systems repair guide. Aug 18, 2019 ke3 jetronic pdf mercedes suggests that special tools are required to adjust the mixture on the bosch ke3 jetronic. I saw the pdf on this site for the conversion, thanks that will help, but i. Gasoline fuel injection system ljetronic bosch pdf download. Fuel injection system fault finding l jetronic fuel injection system engine difficult to start, or fails to start when cold probable cause corrective action cold start injector or thermotime switch faulty test cold start injector and thermotime. Ljetronic fuel injection systems for bmw e12s peter florance. The analogue brains primary function was to take readings from the air flow meter, and to control the fuel injection accordingly. Ljetronic fuel injection systems for bmw e12s first fives. Displaying manualsistemainyeccion l jetronic motoresautomovilescomponentesfuncionamiento. This type of high pressure fuel pump is denoted as a roller cell pump, with the fuel entering the pump and being compressed by rotating cells that force it through the pump at high pressure.
I just purchased it with the computer brain and manifold. 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. Haynes diagram is good, but owners manual shows more. Materials and specifications are subject to change without notice. The injection has as function to provide the amount of fuel exactly. Spec alfa romeo gtv6s, milanos, and 19821989 spiders, bmw e12 5 series and various 3 series cars, the datsun 280z and 280zx. This manual may contain attachments and optional equipment that are not available in your area. Kjetronic fuel injection system k jetronic is a mechanically and hydraulically operated fuel injection pump, introduced by bosch gmbh in the year 1973. 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. The following table is a guide to the fuel paths marked by each blue arrow in figure 6. Page 20 l jetronic system diagram the next diagram is a schematic drawing of the complete l jetronics fuel injection system. The l jetronic aod ils variants are electro nically controlled fuelinjection systems solenoidopersle jun 17, 2019 ke3 jetronic pdf mercedes suggests that special tools are required to adjust the mixture on the bosch ke3 jetronic.
Download file pdf l jetronic workshop manual saab l jetronic workshop manual saab bosch kjetronic fuel distributor seal replacement video to show how i replaced the seals in my mk2 golf 16v kjet fuel distributor. Bosch l jetronic fuel injection idle adjustment, diagnostic and tune up page for usa. Unlike k jetronic, this system took readings from sensors around the engine and made its fuelling accordingly. 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. However, with the ljetronic system our cars use, about 90% of the complexity. Jetronic is a trade name of a fuel injection technology for automotive petrol enginesdeveloped and marketed by robert jetrnoic gmbh from the s onwards. L jetronic is the term used by bosch to describe a fuel injection system controlled by the air flowing through a sensor.
Vw ljetronic fuel injection workshop manual pdf yumpu. Above all popular belief it takes these modules quite a bit to go bad. The d jetronic controlled by intakemanifold pressure. In this system, the injection command unit controls only the fuel system. Fuel injection pumps bosch service repair workshop manuals. Robert bosch ljetronic efi system using mostly common workshop tools.
Bosch l jetronic l jetronic rx7 brought to you by the team at created date. Introduction n this seminar will describe the l jetronic system. Digital data processing and microprocessors make it possible to translate extensive operating. Bosch l jetronic fuel injection troubleshooting, maintenance. Hesselman engines use the ultra lean burn principle. Bosch licensed the concept to many automobile manufacturers.
The technical instruction bookletfuel injection con tinuous injection system cisat the back of the manual describes the components and operation of the kjetronic fuel injection system in detail. Ljetronic electronic fuel injection only 530i 528i. Considerable fuel enrichment is required for a period of time after a cold start. Before troubleshooting, testing or adjusting the k jetronic fuel injection system, the. Gtv6 and milano, however if you own any car with bosch ljetronic injection the article will still help you. I am pretty lost as to all the connections, especially to the manifold itself.
Gasoline fuel injection system ljetronic bosch pdf. It was primarily based on patents that bosch licensed from the bendix corporation. If your bike is a abs model in the tail section is the abs control unit. 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. Small amount of air bypasses the throttle so the engine gets air.
Spec alfa romeo gtv6s, milanos, and 19821989 spiders, bmw e12 5 series and various 3 series cars, the datsun 280z and 280zx, all u. 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. Ljetronic fuel injection system the l jetronic is an electronically controlled fuel injection system which has the advantage of direct air flow sensing. Xep publishing file id f541c9d50 by agatha christie hence the name l jetronic the l stands for luft the german word for air in 1990 bosch motronic fuel injection replaced l jetronic on. Pdf application of hybrid ics to the automotive electronics market. Bosch developed an electronic fuel injection system, called djetronic d for druck, german for pressure, which was first used on the vw 1600tle in 1967. Mechanical fuel injection bosch k jetronic, bosch k jetronic fig. File type pdf d jetronic manual d jetronic manual understanding djetronic fuel injection an overview of bosch djetronic in jaguar v12s 19751980 an overview of bosch djetronic as used in jaguar v12s from 1975 to 1980. The k jetronic pump requires no form of drive and one of its features is that it can meter the fuel as a function of the intake air quantity. Bosch digifant engine management system jetronic motronic. Today, it has been superseded by gasoline injection systems which thanks to. Bendix developed the basic idea of using an inductive element coupled to manifold vacuum as a. Feb 12, 2019 bosch digifant engine management system jetronic motronic. Specifically for my 1982 alfa romeo spider but this should work on any l jetronic or motroinic fule injection.
Gregs bosch l jetronic fuel injection idle adjustment, diagnostic and tune up page, latest revision sept. The l jetronic was the first massproduced, fully electronic fuel injection system. Vw ljetronic fuel injection workshop manual author. Please consult your local distributor for those items you may require. Bosch l jetronic fiat fuel injected engines guide file type. If the inlet air temperature sensor fails its resistance tests, you cant service just the sensor. Our bosch fuel injection pumps workshop manuals contain indepth maintenance, service and repair information. Vw ljetronic fuel injection workshop manual created date. Bosch le jetronic bmw copyright equiptech boschlejetronic thereismuchconfusionabouttheactualtypeofinjectionsystemfittedtomanybmwmotorcarsduringtheperiod1980to. Bosch ljetronic fuel injection troubleshooting, maintenance. For the first 30 seconds, up to 60% additional fuel will be provided to. Fuel injection fundamentals porsche club of america. A computer controls the injection and ignition systems with reference to shared optimization criteria. The first one is under the fuel tank is the ignition control unit icu, under the seat is is the fuel injection control unit l.
Online library bosch l jetronic fuel injection free manual bosch l jetronic fuel injection free manual bosch l jetronic fuel injection 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. Gasoline fuel injection system mono jetronic pdf995 bitbin. The task of a fuel injection system is to supply precise amount of fuel to the combustion chamber at that particular moment. Prior to l jetronic, mechanical fuel injection systems had proven that directly injecting atomized fuel into the cylinder resulted in better engine operation.
Volkswagen adapted the ljetronic for the type 4 air cooled 411 engines sold porsche 912e workshop manual and has been enhanced to provide additional. In the le jetronic system, the injection valves spray the fuel simultaneously, what is to say, they are all driven at the same time. 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 bosch l jetronic fuel injection system is electronically controlled to regulate the fuel supply in relation to the air flow. Combining this direct injection theory with electronic sensors, valves. Can anyone provide a pdf or file on the jetronic fuel injection. File type pdf bosch l jetronic fiat fuel injected engines guide file type the bosch l jetronic system is used on all u. Bosch ke jetronic continuous injection system mechanical fuel injection overview part 1of 6 fuel injection system bosch cise 1986 fuel systems mercedesbenz cise electronic control system description the fuel injection system used on all mercedesbenz gasoline engine vehicles uses. Bosch djetronic fuel injection troubleshooting and repair djetronice explained by pierre hedary part 1 this video is about djetronice explained part 1. Singlepoint fuel injection singlepoint throttlebody injection tbi fuel injection is the concept behind this electronicallycontrolled injection system in which a centrally located solenoid operated injection valve mounted upstream from the.
Djetronic history and fundamentals history the djetronic system developed by bosch in the early 1960s was the first massproduction electronic fuel injection system. However the components of other cars using ljetronic will. A thorough understanding of the various components is required before working on k jetronic fuel systems. Jetronic controls fuel supply while the electronic ignition system provides optimal ignition control.
Robert bosch this manual is designed to assist the technician unfamiliar with robert bosch. Motronic, featuring digital processing for numerous engine functions. 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. Approximately up until 1994 mechanical fuel injection systems have been installed on certain mercedes, audi, volkswagen, ford etc. Ljetronic the bosch ljetronic also called afcair flow controlled fuel injection was put into usspec type 4s in the last model year 1974. 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 k jetronic dme motronic afc l jetronic mpi d jetronic. If the vehicle has an automatic transmission, put into neutral c. The lejetronic system is electronically commanded and injects the fuel in the intake manifold. Bosch ljetronic overview checking your ke jetronic fuel pressures this video is. A thorough understanding of the various compo nents is required before working on kjetronic fuel systems. The ljetronic was the first massproduced, fully electronic fuel injection system.
The l jetronic aod ils variants are electro nically controlled fuel injection systems solenoidopersle l jetronic in iha bosch technical instruclion series. Ke3 jetronic pdf mercedes suggests that special tools are required to adjust the mixture on the bosch ke3 jetronic. The le jetronic system is analog, and therefore it does not keep in memory possible damage that may occur. This page was last edited on 30 novemberat sequential fuel injection and knock control. This manual describes the troubleshooting and repair of vehicles with the.
Continuous injection system found on european cars and volkswagen models assembled in the u. Between the years 1973 and 1995, the highly reliable, mechanical multipoint injection system k jetronic was installed as original equipment in seriesproduction vehicles. Sep 18, 2019 ke3 jetronic pdf mercedes suggests that special tools are required to adjust the mixture on the bosch ke3 jetronic. Onsomel jetronic systems, the air temperature sen sor is visible in the air flow meter inlet. 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.
In a fuel injection system the entire operation is based on the amount of air entering the. Before checking any other part of the system, this sensor. Mechanical fuel injection bosch kjetronic, bosch k jetronic. Cis kjetronic fuel injection tester with quick couplers tool aid. Direct fuel injection was used in notable world war ii airplane engines such as the junkers jumo 210, the daimlerbenz db 601, the bmw 801, the shvetsov ash82fn m82fn.
Bosch superseded the djetronic system with the kjetronic and ljetronic systems for 1974, though some cars such as the volvo 164 continued. There are several variations of the technology offering technological development and refinement. L jetronic the bosch l jetronic also called afcair flow controlled fuel injection was put into usspec type 4s in the last model year 1974. Le jetronic was the first engine management system for the e30 to feature an ecu. Combined ignition system and luel injection system molfonlc. 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. The d jetronic system developed by bosch in the early 1960s was the first massproduction electronic fuel injection system. Ljetronic fuel injection technical troubleshooting article. K jetronic is the term used by bosch to describe a fuel injection system which features continuous injection. 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. The ljetronic is an electronically controlled fuel injection system which has the advantage of direct air flow sensing. These early motronic systems integrated the spark timing element with thenexisting jetronic fuel injection technology. The ongoing development of the control unit and the sensors has led from the djetronic to the ljetronic, and resulted in this fuelinjection system becoming.
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