Our bosch fuel injection pumps workshop manuals contain indepth maintenance, service and repair information. Introduction n this seminar will describe the l jetronic system. 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. The fuel filter contains a paper element with a mean pore size of 10 m backed up by a fluff trap. In 1990 bosch motronic fuel injection replaced ljetronic on the spider and 164 models. Download bosch k jetronic service guide book pdf free download link or read online here in pdf. Djetronic history and fundamentals history the djetronic system developed by bosch in the early 1960s was the first massproduction electronic fuel injection system. 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. If in doubt, spray break cleaner on pipes, hoses, injectors, intake manifold and map sensor. Scribd is the worlds largest social reading and publishing site. Searched and read just about every source and post on the l jetronic system and i have the pdf on the system replaced all fuel lines except center tunnel line replaced cold start valve previous one destroyed during removal of old fuel lines replaced fuel pump relay mounted under battery checked and confirmed injector ground attached on coil. The bosch l jetronic fuel injection system is electronically controlled to regulate the fuel supply in relation to the air flow. 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. While the general operating principles are the same, motronic offers more precise control over fuel and ignition events.
The le jetronic ecu contains a fuel map with an injector opening time for basic. Nissan offered electronic, multiport fuel injection in 1975 with the bosch l jetronic system used in the nissan l28e engine and installed in the nissan fairlady z, nissan cedric, and the nissan gloria. Ljetronic fuel injection systems for bmw e12s peter florance. 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. Vw ljetronic fuel injection workshop manual author. Bosch superseded the djetronic system with the kjetronic and ljetronic systems for 1974, though some cars such as the volvo 164 continued. Read online bosch k jetronic service guide book pdf free download link book now. 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. Combining this direct injection theory with electronic sensors, valves. Mechanical fuel injection bosch k jetronic, bosch k jetronic the fuel pump 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.
Bosch ljetronic and motronic fuel injection systems repair guide. Jetronic is a trade name of a fuel injection technology for automotive petrol engines, developed. Fuel injection pumps bosch service repair workshop manuals. All books are in clear copy here, and all files are secure so dont worry about it. Bosch l jetronic fuel injection troubleshooting, maintenance. Vw ljetronic fuel injection workshop manual created date.
Bosch l jetronic l jetronic rx7 brought to you by the team at created date. 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. Bosch l jetronic fiat fuel injected engines guide file type. Download file pdf l jetronic workshop manual saab l jetronic workshop manual saab bosch k jetronic fuel distributor seal replacement video to show how i replaced the seals in my mk2 golf 16v kjet fuel distributor. L jetronic electronic control unit ecu, airflow sensor, system relay, fuel pump relay, lambdasond oxygen sensor, vacuum switch, electric fuel pump, coolant temperature sensor, fuel injectors, and the electronic control unit terminal for the constant idle systems cis if equipped. The ljetronic is an electronically controlled fuel injection system which has the advantage of direct air flow sensing. Gasoline injection systems overview 16 mmotronic engine management mmotronic.
This manual is designed to assist the technician unfamiliar with robert bosch fuel injection systems in locating faults in the ljetronic system, isolating. Vw l jetronic fuel injection workshop manual author. The d jetronic system developed by bosch in the early 1960s was the first massproduction electronic fuel injection system. 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. Ke3 jetronic pdf mercedes suggests that special tools are required to adjust the mixture on the bosch ke3 jetronic. 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. Compared with ljetronic, the fuel injectors used by le jetronic have a higher impedance. Vw ljetronic fuel injection workshop manual pdf yumpu. Prior to l jetronic, mechanical fuel injection systems had proven that directly injecting atomized fuel into the cylinder resulted in better engine operation. 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. It was primarily based on patents that bosch licensed from the bendix corporation. Bosch licensed the concept to many automobile manufacturers. Ljetronic the bosch ljetronic also called afcair flow controlled fuel injection was put into usspec type 4s in the last model year 1974.
File type pdf bosch l jetronic fiat fuel injected engines guide file type the bosch l jetronic system is used on all u. Spec alfa romeo gtv6s, milanos, and 19821989 spiders, bmw e12 5 series and various 3 series cars, the datsun 280z and 280zx, all u. Home automotive books gasoline fuelinjection system ljetronic. L jetronic adventure injectors not firing pelican parts. Fuel filter the fuel filter retains particles of dirt which are present in the fuel and which would otherwise have an adverse effect on the functioning of the injection system. Bendix developed the basic idea of using an inductive element coupled to manifold vacuum as a. Today, it has been superseded by gasoline injection systems which thanks to. Bosch le jetronic bmw copyright equiptech boschlejetronic thereismuchconfusionabouttheactualtypeofinjectionsystemfittedtomanybmwmotorcarsduringtheperiod1980to.
Where to download d jetronic manual d jetronic manual understanding d jetronic fuel injection an overview of bosch d jetronic in jaguar v12s 19751980 an overview of bosch d jetronic as used in jaguar v12s from 1975 to 1980. There are several variations of the technology offering technological development and refinement. Since its introduction, the kjetronic gasolineinjection system has pro. Fuel tank the fuel tank contains a fuel gauge sending unit, a filler tube and a fuel pump. The complete system contains the following components. 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. In 1984 rover fitted lucas electronic fuel injection, which was based on some l jetronic patents, to the sseries engine as used in the 200 model. The l jetronic was the first massproduced, fully electronic fuel injection system. Page 20 l jetronic system diagram the next diagram is a schematic drawing of the complete l jetronics fuel injection system. 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. Vw l jetronic fuel injection workshop manual created date. The pump is capable of producing a pressure of 8 bar 120 psi with a.
Fuel injection fundamentals porsche club of america. 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. The repair manual is intended for owners of seat toledo, service stations and repair shops. Between the years 1973 and 1995, the highly reliable, mechanical multipoint injection system k jetronic was installed as original equipment in seriesproduction vehicles. The task of a fuel injection system is to supply precise amount of fuel to the combustion chamber at that particular moment. Combustion in the gasoline engine the sparkignition or ottocycle engine 2 gasolineengine management technical requirements 4 cylinder charge 5 mixture formation 7 gasoline injection systems overview 10 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. Fuel injection system fault finding ljetronic 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 switch. In japan, the toyota celica used electronic, multiport fuel injection in the optional 18re engine in january 1974. Chapter of d jetronic articles by drdjet describes systematic fault finding troubleshooting and repair on your bosch fuel injection system.