Robert bosch gmbh, 2000 postfach 30 02 20, d70442 stuttgart. Jetronic manual mercedes bosch ke jetronic manual bosch ke jetronic workshop manual bosch k jetronic service manual bosch d jetronic fuel injection manual manual k jetronic k jetronic l jetronic le. Do not try to correct engine trouble by making simple adjustments to the idle speed or the idle mixture co. 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. It requires 01 drive, sod injects the luel continuously. I hope i have covered all the problem areas and lifted some of the mist surrounding this system. The complete system contains the following components.
Bosch k jetronic mechanical fuel injection troubleshooter. Gasoline fuelinjection system kjetronic pdf download. Product information automotive gasoline systems diagnostics and. Gasoline fuel injection system k jetronic pdf download.
Bosch k jetronic fuel injection manual pdf document. In this system, the injection command unit controls only the fuel system. D some of these have thin spots from rubbing on other parts. D jetronic was a precursor of modern common rail systems as it had constant pressure fuel delivery to the. This is the fuel injection system used throughout most of the mid80s to early 90s cars. The system in general is very reliable, and was only bested in 1984 by the introduction of the motronic engine management system that controls both ignition and fuel injection together.
Certain operating conditions make it necessary to correct the mixture accordingly. Mechanical fuel injection bosch k jetronic, bosch k jetronic fig. Bosch ke3 jetronic 539 89 injection system manual 328 mondial to read online or download as pdf. This system replaces the electronic system of earlier years. This little goody is a common culprit in k jet or cis problems, along with pumps, oneway valves, accumulators and fuel distributors. K jetronic is a mechanically and hydraulically operated fuel injection pump, introduced by bosch gmbh in the year 1973. Fuel system k jetronic lambdathis page is dedicated to checking and, if need be, adjusting your k jetronic lambda fuel injection system. The mechanical k jetronic, which had already proven itself as a multipoint fuel injection system, was therefore re. The dual exhaust pipes from the engine combine into a single pipe just. It is connected to a bimetal plate heater that is located inside and used to regulate the fuel pressure. System overview 18 fuel system 20 operatingdata acquisition 28 operatingdata processing 38. K jetronic fuel injection tester with case ta 33865. These fuel injection systems were considered to be really reliable and trustworthy.
Mar 02, 2012 understanding d jetronic fuel injection an overview of bosch d jetronic in jaguar v12s 19751980. There are several variations of the technology offering technological development and refinement. The engines fuel requirements a sparkignition engine needs a particular air fuel ratio in order to operate. Bosch kjetronic fuel injection part 1 volvo owners club. I have my k jetronic module completely removed and the fuel relay circuit still functions as it should. Approximately up until 1994 mechanical fuel injection systems have been installed on certain mercedes, audi, volkswagen, ford etc. The fuel relay circuit is completely independent of the k jetronic cpu.
Adjusting the control pressure regulator on the kjetronic. 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. Kejetronic is based on the mechanical basic system of kjetronic. This success is a result of the advantages which fuel injection can offer when considering todays demands for economy, performance, and cleaner exhausts.
It uses a higher pressure and has some other differences, but might well be of some similarity to the k, a lot of the manual deals which each component, and has. Combining this direct injection theory with electronic sensors, valves. Apart from minor alterations the basic principles of the hydraulics and mechanics used on the k jetronic system are unchanged on the ke jetronic system. Find great deals on ebay for k jetronic and bosch k jetronic. Having recently sorted out a problem with mine, and hopefully understanding its. 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. In engineering terms, the k jet has a very good mean time between failure, but a horrific mean time to repair. Materials and specifications are subject to change without notice. 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. Bosch k jetronic fuel injection service repair manual. In contrast to the intermittent type fuel injection, this system measures air volume through and air flow sensor and injects fuel continuously in front of the intake valves, regardless of firing position.
Pdf application of hybrid ics to the automotive electronics market. The kjetronic system was installed as original equipment in series production vehicles in the years 1973 through 1995. 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. Technical data sheets bosch k jetronic fuel injection. This video its no mine but i had to put in my channel due i want to help some people to fix the most common problem the poor acceleration in the. Then tested and calibrated to manufacturers original specification. I dont think there is a manual for the k fuel injection system, there is a separate one for the ke3 which i have, applies to a swiss market mondial 3.
Between the years 1973 and 1995, the highly reliable, mechanical multipoint injection system k jetronic was installed as original equipment in seriesproduction vehicles. It doesnt quite match the typical k jetronic diagram in the bosch k jetronic technical instruction book but it may be just a nomenclature difference. Tuning and adjusting cis fuel injection pelican parts. 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. Since its mechanical and has no electronic trigger at the injectors and no timing mechanism in the fuel distributor to fire the injectors, how does the system know when to squirt the fuel into the cylinder.
My theory is that the tach signal detection is actually within the fuel pump relay itself but it has been quite a while since i looked at this schematic. It has the m110 engine fitted with bosch k jetronic fuel injection and it doesnt have an oxygen sensor. The engine control unit ecu may be either analog or digital, and the system may or may not have closedloop lambda control. It is quite straightforward in its operation, providing diagnosis and testing is acrried out logically and one step at.
Gasolineengine management gasoline fuelinjection system kjetronic technical instruction. It has no fuel rail, but instead relies on the fuel distibut. Pdf in the last few years hybrids have been increasingly used in. Since their introduction, the jetronic fuel injection systems have proved themselves millions of times over under the harsh conditions of everyday driving. 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. Nov 21, 2009 the fuel distribu tor allocates this fuel to the injection the k jetronic is a mechanically and valves of the individual cylinders. Gasolineengine management gasoline fuel injection system k jetronic technical instruction. Especially fuel injection and ignition was my soecial interest since i bought my fist oldtimer in 2007, a mercedesbenz 450 sl from 1973. Video to show how to test and adjust the warm up regulator wur on a mk2 golf gti 16v kjet.
I followed my scientific curiosity to discover every special subject on boschs d jetronic and today i consider myself a specialist on that. 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. The fuel distribu tor allocates this fuel to the injection the k jetronic is a mechanically and valves of the individual cylinders. Prior to l jetronic, mechanical fuel injection systems had proven that directly injecting atomized fuel into the cylinder resulted in better engine operation. A thorough understanding of the various components is required before working on k jetronic fuel systems. Please consult your local distributor for those items you may require. Gasoline fuel injection system mono jetronic pdf995 bitbin. L jetronic fuel injection systems for bmw e12s peter florance. For more than ten years, porsche used the bosch k jetronic continuous injection system cis on all production 911s. The following table is a guide to the fuel paths marked by each blue arrow in figure 6. Using the k jet fuel pressure test kit notes from experience with 1979 volvo 244dl and a 1983 volvo 244ti turbo. As with our fuel distributors, kmi service exchanged k jetronic warm up regulators are fully remanufactured and calibrated to manufacturers original specification on our purpose built test and calibration bench. 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. The engine is pretty young, as it only has about 60,000 kms.
By contrast, in the surface carburetor, in which the fuel was heated by the. Assuring you of quality and reliability at a cost effective price. The bosch lh jetronic electronic fuel injection system became available on the b21flh engine in 1982 and on the b23flh in 1983. Genuine bmw e21 fuel injection pipe k jetronic 4th cylinder oem 531266608. This shop manual may contain attachments and optional equipment that are not available in your area. Anyhow here is the link bosch k jetronic fuel injection manual. View profile view forum posts private message view blog entries member join date jun 11th, 2007. Electronically controlled mechanical fuel injection. Automotive equipment business sector, department for automotive services, technical publications khpdi2. As you have probably already have noticed your k series has 2 if its a abs model 3 modules, rather difficult to troubleshoot compared to the old airhead bikes. In the mean time, lets strive to demystify what fi is, how vw does it, and how to keep our sciroccos running.
It is a euromarket 1979 280ge lwb with a manual transmission. K jetronic is the term used by bosch to describe a fuel injection system which features continuous injection. Im going to toss some links on here as sourdough starter. Djetronic was a precursor of modern common rail systems as it had constant pressure fuel delivery to the. The le jetronic system is analog, and therefore it does not keep in memory possible damage that may occur. Chapter of d jetronic articles by drdjet describes systematic fault finding troubleshooting and repair on your bosch fuel injection system. In 1988 this was upgraded to the new ke jetronic system with elements of electronic control added. 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 d jetronic system developed by bosch in the early 1960s was the first massproduction electronic fuel injection system. L jetronic is the term used by bosch to describe a fuel injection system controlled by the air flowing through a sensor.
The system consists of a carb spacer plate with a fuel block and injector, an ecu, and a wide band o2 sensor. 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. Jetronic controls fuel supply while the electronic ignition system provides optimal ignition control. The l jetronic was the first massproduced, fully electronic fuel injection system. I have a 25 pg pdf on the k jetronic system from bosch titled mechanical fuel injection system with lamda closedloop control k jetronic if anyone is interested. Kejetronic is based on the mechanical basic system of k jetronic. Sinds it is a horror story to replace this thing on a 8. L jetronic electronic control unit ecu, airflow sensor, system relay, fuel pump relay, lambdasond oxygen sensor, vacuum switch, electric fuel pump, coolant.
File type pdf bosch k jetronic fuel injection service repair manual bosch k jetronic fuel injection service repair manual bosch k jetronic cis explained bosch k jetronic fuel distributor quick look whilst ive got it out of the car i thought id give you a quick look at a. If in doubt, spray break cleaner on pipes, hoses, injectors, intake manifold and map sensor. Classic vehicles will take you on a journey through the history of fuel injection. Today, it has been superseded by gasoline injection systems which thanks to. The kjetronic is a mechanical system in which the fuel is. Vw l jetronic fuel injection workshop manual created date. Better yet would be to research, edit and post up a completly refined web page link of my own, aint got one yet. The testarossa when released in 1984 was fitted with the bosch k jetronic fuel injection system. Having trouble with bosch kjetronic cis bob is the oil guy. Kjetronic is a mechanical injection fuel injection system in. Playing with your k jetronic warm up regulator, or wur. Where can i buy the plastic fuel line material the preasure control line is.
This manual is written specifically for skilled service personnel and it is. Fuel pressure testers free delivery possible on eligible purchases. Gasoline injection systems overview 16 mmotronic engine management mmotronic. This is how the moving part should look like in rest position. K jet mechanical fuel injection depends on continuous regulation and variation of fuel pressure delivered to the injectors. F k jetronic 320i u electronic f l jetronic electronic fuel injection only 530i 528i f motronic computerized with ignition 535i 528e n most modern fuel injection systems are. Purely mechanical injection systems are unable to comply with these farreaching stipulations. Scribd is the worlds largest social reading and publishing site. R02cr e b colqegu couivo\ aglase we guq ph ph ecn le logq coucvtloue eae16uj sqgble 10 cugua vqsblsqou ob6lguua couqguoue guq nuq6l bgl11cr1gl logq. Replacing bosch jetronic with megasquirt efi mercedes.
It was primarily based on patents that bosch licensed from the bendix corporation. Fuel tank the fuel tank contains a fuel gauge sending unit, a filler tube and a fuel pump. 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 system is based on the k jetronic mechanical system, with the addition of an electrohydraulic actuator, essentially a fuel injector inline with the fuel return. Bosch licensed the concept to many automobile manufacturers. There is also a 12v power socket on the top of the cpr.
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