This is an excellent book containing a detailed description of the l jetronic fuel injection system. Using the lambda sensor together with additional equipment for the lambda closedloop control facility, the k jetronic can already comply today with the exhaustgas regulations of tomorrow. Kjetronic 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 kjetronic since its introduction, the kjetronic gasolineinjection system has proved itself in millions of vehicles. By club member john hall, who worked for volvo usa for many years. The bosch ljetronic also called afcair flow controlled fuel injection was put into usspec type 4s in the last model year 1974. Motronic med 7 direct petrol injection system will be used for the first time in the lupo fsi and golf fsi. Legitronic labeling software legitronic secure series. In addition to the pressure gauge and fittings shown in the picture, a tachometer, co meter and voltohmmeter are needed for testing the l jetronic system in the vehicle as described in this manual. The l jetronic aod ils variants are electro nically controlled fuelinjection systems solenoidopersle 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. Since this point, the kjetronic has now become particularly impor tant with regard to maintenance and repair. Bosch ke3 jetronic 539 89 injection system manual 328 mondial to read online or download as pdf. Mechanical fuel injection bosch k jetronic, bosch k jetronic fig. For those not familiar with bosch ljetronic fuel injection you may want to start with l jetronic seminar in pdf format. Gregs bosch ljetronic fuel injection idle adjustment, diagnostic and tune up page, latest revision sept.
The following table is a guide to the fuel paths marked by each blue arrow in figure 6. The l jetronic was a further development of the d jetronic found in the porsche 914 1. To search for the instruction manual and other documentation for your bosch appliance, simply enter the model number enr of your appliance below and well take you to the available documentation. Legitronic secure series labeling software, explains administrator and user features to assist in be 21 cfr part 11 compliance. When switch is closed throttle closed, fuel is cut until engine rpm drops below ecu. The fuel injection ecu is under the horizontal parcel shelf behind the seats. Home video course bosch ke3 jetronic 539 89 injection system manual 328 mondial read online available as pdf. It was primarily based on patents that bosch licensed from the bendix corporation. All you need for diagnostic tools is a fuel pressure gauge and a multimeter, and a manual. They have the potential to reduce fuel consumption by up to 15% compared to a similar engine with intake manifold injection. One of the most important parameters of the djet and any other fuel injection system for that matter.
When pressure is constant, as well as the injector orifice it is being metered through, the duration injector is open is the remaining variable by which fuel amount can be. Direct petrol injection system with bosch motronic med 7. In reality, the ljetronic system is very simple, very reliable, and easy to diagnose. Since the electric fuel pump supplies more fuel that is used by the engine, a valve in the pressure regulator opens and returns this excess fuel to the fuel tank. 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.
Bosch ljetronic fuel injection brandeis university. Tech articles and troubleshooting the bosch ljetronic systems for the alfa romeo spider. Please check the workshop manual to verify if the actual car is equipped with a system described in this manual. Using the lambda sensor together with additional equipment for the lambda closedloop control facility, the kjetronic can already comply today with the exhaustgas regulations of tomorrow. Sep 15, 2012 everyhing about bosch d jetronic some wrongly write djetronik fuel injection system equiped cars of all manufacturers from a as in auxiliary air valve via e las in ecu and m as in map sensor to z as in zero adjustment. If the inlet air temperature sensor fails its resistance tests, you cant service just the sensor. I personally own a vintage porsche 914, and this book really helped me understand what was actually going on behind the scenes of my fuel delivery system. C ge wc ujsiu coucl0116q agugplg qncjeq pi we welepa egkalua dnsuqch lus ugb e6lje0l logq b6lujte uj. 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. Plus a forum where drdjet and other experts help with competent advice and repair instructions.
This manual is designed to assist the technician unfamiliar with robert bosch fuel injection systems in locating faults in the ljetronic system, isolating. The bentely manual does an excellent job of explaining fi diagnostic procedures. The l jetronic principles were later adapted for use in the porsche 911 series models. 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. Velda has updated its privacy policy to provide you with more information about how velda protects your privacy, including information about how you can exercise your rights relating to data. In addition to the pressure gauge and fittings shown in the picture, a tachometer, co meter and voltohmmeter are needed for testing the ljetronic system in the vehicle as described in this manual. The le jetronic command unit receives various input signals, from the various sensors that send precise information about the instant engine operation conditions. Bosch ljetronic fuel injection manual volkswagen type2vanagon djetronic fuel injection pro training manual. 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. The pressure gauge kdep 1034 is the same unit used to test bosch kjetronic cis systems and reads from 06 bar pressure. 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. Chapter of d jetronic articles by drdjet describes systematic fault finding troubleshooting and repair on your bosch fuel injection system.
Bosch k jetronic fuel injection manual linkedin slideshare. Onsomel jetronic systems, the air temperature sen sor is visible in the air flow meter inlet. 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. Ljetronic fuel injection systems for bmw e12s first fives. Most people blame ignition system problems on the fuel injection and go on a parts. Ljetronic system throttle and idlewot switches idle switch is used for coasting fuel cutoff on later modelse12 79 81. Then, the command unit processes this information received and calculate the appropriate fuel injection time, through an electric signal. Your feedback helps us continuously improve your online experience.
Gregs bosch l jetronic fuel injection idle adjustment, diagnostic and tune up page, latest revision sept. Chapter 11, visual basics for applications, discusses the development facilities of an integrated development environment. A couple of velcro strips secure the front edge of this carpeted panel and a couple of hard to find screws hold the rear edge. Nov 21, 2009 today, it has been superseded by gasoline injection systems which thanks to electronics have been vastly im proved and expanded in their func tions. As of 25 may 2018, our policy complies with the european unions new general data protection regulation gdpr. 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. 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. This is an excellent book containing a detailed description of the ljetronic fuel injection system. Prior to ljetronic, mechanical fuel injection systems had proven that directly injecting atomized fuel into the cylinder resulted in better engine operation. The kjetronic is a mechanical system in which the fuel is continuously metered in accordance with the amount of air drawn in by the engine. 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 ljetronic fuel injection idle adjustment diagnostic.
Vw ljetronic fuel injection workshop manual pdf yumpu. If in doubt, spray break cleaner on pipes, hoses, injectors, intake manifold and map sensor. This manual will describe the kjetronics function and its particu lar features. The pressure gauge kdep 1034 is the same unit used to test bosch k jetronic cis systems and reads from 06 bar pressure. The d jetronic system developed by bosch in the early 1960s was the first massproduction electronic fuel injection system. Vw ljetronic fuel injection workshop manual author. This was a microsoft powerpoint document, presented at the 1999 e12 fall fest in virginia beach, va.
The bosch d jetronic is an electronical gasoline injection system which was introduced in 1967. These fuel injection systems were considered to be really reliable and trustworthy. Before troubleshooting, testing or adjusting the k jetronic fuel injection system, the ignition system and the mechanical system of the engine. Le is the german designation of the european version of their air flow meter, with lu being the designation. Vw ljetronic fuel injection workshop manual created date.
A thorough understanding of the various components is required before working on k jetronic fuel systems. The primary pressure regulator that is installed in the fuel distributor housing maintains a constant pressure in the fuel system of the kjetronic. To find the model number enr, check the rating plate of your appliance. Everyhing about bosch djetronic some wrongly write djetronik fuel injection system equiped cars of all manufacturers from a as in auxiliary air valve via e las in ecu and m as in map sensor to z as in zero adjustment. Approximately up until 1994 mechanical fuel injection systems have been installed on certain mercedes, audi, volkswagen, ford etc. Bosch le jetronic bmw copyright equiptech boschlejetronic thereismuchconfusionabouttheactualtypeofinjectionsystemfittedtomanybmwmotorcarsduringtheperiod1980to. If you wish to be contacted by us, please use our regular contact form here, contact customer support at 800 9442904, or chat online with a customer support representative. Gtv6 and milano, however if you own any car with bosch ljetronic injection the article will. The k jetronic is a mechanical system in which the fuel is continuously metered in accordance with the amount of air drawn in by the engine.
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