The upper connection hose is attached to the fuel distributor. Kjet mechanical fuel injection depends on continuous regulation and variation of fuel pressure delivered to the injectors. The cpr is a device used for the enrichment of mixture during the engine warmup phase. It has the m110 engine fitted with bosch k jetronic fuel injection and it doesnt have an oxygen sensor. Line or system pressure readings will help define a problem with the fuel delivery system such as the pumps and filter. Bosch ke jetronic system the bosch ke jetronic fuel injection system is fitted to escort rs turbo models and is a further development of the k jetronic system. The ezk spark control is the system master, if engine rotation signals are not provided to the ezk, spark will not be generated and the ezk will not provide a turnon signal to the lh jetronic fuel injection system. Fuel injection system the ke2jetronic fuel injection system is fitted to turbocharged engines. This inline pressure tester indicates problem sources control pressure regulator, fuel distributors or other specific fuel injection components that may require replacing.
Bosch k jetronic continuous injection system mechanical fuel injection overview 15. The mechanical fuel injection system has recently been overshadowed by. 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. The banjo fittings in this image are from my junk box. Start the engine and bring up to normal running temperature. Especially fuel injection and ignition was my soecial interest since i bought my fist oldtimer in 2007, a mercedesbenz 450 sl from 1973. 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 k jetronic system. Interject k jetronic servicing and cleaning procedure 1.
Adjusting the control pressure regulator on the kjetronic injection system2. The key is to advance the timing to the peak power point. Chapter of d jetronic articles by drdjet describes systematic fault finding troubleshooting and repair on your bosch fuel injection system. Bosch le jetronic bmw copyright equiptech boschlejetronic thereismuchconfusionabouttheactualtypeofinjectionsystemfittedtomanybmwmotorcarsduringtheperiod1980to. This synthesis, comprising the mechanical basic functions coupled with electronic adaptation and optimization functions is the. The fuel is supplied by an electrically driven fuel pump which develops the pressure necessary for injection. Since their introduction, the jetronic fuel injection systems have proved themselves millions of times over under the harsh conditions of everyday driving. The 190e utilizes an electronically controlled version of the k jetronic injection system called ke jetronic cise. A computer controls the injection and ignition systems with reference to shared optimization criteria. It is a euromarket 1979 280ge lwb with a manual transmission. Electronically controlled systems the fuel is supplied by an electrically driven fuel pump which develops the pressure necessary for injection. 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. Chapter of djetronic articles by drdjet describes systematic fault finding troubleshooting and repair on your bosch fuel injection system. This development was a direct result of the advantages which are inherent in the injection of gasoline with regard to demands for economy of operation, high output power, and last but not least improvements to.
K jetronic is different from pulsed injection systems in that the fuel flows continuously from all injectors, while the fuel pump pressurises the fuel up to approximately 5 bar 73. Reparation et entretien des systemes dinjection dessence. 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. The technical instruction bookletfuel injection continuous injection system cisat the back of the manual describes the components and operation of the k jetronic fuel injection system in detail. Adjusting the control pressure regulator on the kjetronic. The k jetronic is a mechanical fuel injection system which injects continuously and which needs no form of drive whatsoever. I followed my scientific curiosity to discover every special subject on boschs djetronic and today i consider myself a specialist on that. Bosch licensed the concept to many automobile manufacturers. Today, it has been superseded by gasoline injection systems which thanks to electronics have been vastly im proved and expanded in their func tions. Apart from minor alterations the basic principles of the hydraulics and mechanics used on the kjetronic system are unchanged on the kejetronic system. The fuel is injected by solenoidoperated fuelinjection valves into the. Bosch kjet mixture setting posted on august 31, 2009 by larry fletcher comments off on bosch kjet mixture setting after assembly of the fuel system, run the fuel pump and depress the air flow sensor plate for a couple of seconds to bleed air out of the fuel distributor. This is the fuel injection system used throughout most of the mid80s to early 90s cars. Ils sont ouvert par le dme pas en continu comme dans le systeme kjetronic.
Classification des systemes d injection a essence 9 1 historique. 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. It requires 01 drive, sod injects the luel continuously. 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. Before troubleshooting, testing or adjusting the kjetronic fuel injection system, the. 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. These adjustments are intended to be followed by an. Check the system pressure and flow with the lb2912f. Bosch ke3 jetronic 539 89 injection system manual 328 mondial to read online or download as pdf. L jetronic system fuel injectors n open when energized by ecu not continuous as k jetronic. Troubleshooting symptoms kjetronic is a mechanical system. This system is a further development of the mechanically controlled cis system.
Bosch k jetronic fuel injection manual linkedin slideshare. If the inlet air temperature sensor fails its resistance tests, you cant service just the sensor. We found a pdf of how to disassemble and reassemble the wur, but of course this requires new bits to put in it. This is an inline pressure tester which indicates problem sources control pressure regulator, fuel distributors or other specific fuel injection components that may require replacing. Mechanical fuel injection systems first saw light of day at the turn of the century, however the following 100 years has seen the system evolve from a very basic and almost crude fuel delivery system, to the recent mass produced versions of the bosch k and ke jetronic. Minor running changes and improvements are made during production, but essential operation and service of the system remains alike on all vehicles equipped with the cis injection. Apart from minor alterations the basic principles of the hydraulics and mechanics used on the kjetronic system are.
The following table is a guide to the fuel paths marked by each blue arrow in figure 6. The testarossa when released in 1984 was fitted with the bosch k jetronic fuel injection system. There are several variations of the technology offering technological development and refinement. Using the kjet fuel pressure test kit notes from experience with 1979 volvo 244dl and a 1983 volvo 244ti turbo. Djetronic, kjetronic and ignition for classic cars. Kjetronic system overview the kjetronic is a mechanically and hydraulically controlled fuelinjection system which needs no form of drive and which meters the fuel as a function of the intake air quantity and injects it continuously onto the engine intake valves. Digital data processing and microprocessors make it possible to translate extensive operating. 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. The 190e utilizes an electronically controlled version of the kjetronic injection system called kejetronic cise. A thorough understanding of the various components is required before working on kjetronic fuel systems. Usa spec cars featured even more electronic controls in an attempt by bosch ferrari to comply. Mercedes suggests that special tools are required to adjust the mixture on the bosch ke3jetronic cise fuel injection, such as is used on the 198891 560 series motors.
The volume of air taken in by the engine is measured to determine the amount of fuel to inject. The engine is pretty young, as it only has about 60,000 kms. The details in this file refer to ke jetronic 19841987 on the us coupe and 4k the 1987. 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. Telechargez comme pdf, txt ou lisez en ligne sur scribd. Fuel injection system the ke2 jetronic fuel injection system is fitted to turbocharged engines. The essential difference between the two is mixture correction by means of electronically controlled correction functions cise. A thorough understanding of the various components is required before working on k jetronic fuel systems. These fuel injection systems were considered to be really reliable and trustworthy. In 1988 this was upgraded to the new ke jetronic system with elements of electronic control added. This success is a result of the advantages which fuel injection can offer when considering todays demands for economy, performance, and cleaner exhausts. The kjetronic system was installed as original equipment in series production vehicles in the years 1973 through 1995. 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.
Mechanical fuel injection bosch kjetronic, bosch k jetronic fig. On the photos 1 and 24 you can see how a control pressure regulator cpr looks like. Onsomeljetronic systems, the air temperature sen sor is visible in the air flow meter inlet. Bosch kejetronic system the bosch kejetronic fuelinjection system is fitted to escort rs turbo models and is a further development of the kjetronic system. Since this point, the kjetronic has now become particularly impor tant with regard to maintenance and repair. 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. Bosch developed many more types of electronic fuel injection after d jetronic l jetronic, k jetronic, etc.
The dedicated shade tree mechanic can do it, but needs to be wellinformed first. Classification des systemes dinjection a essence 9 1 historique. General information and precautions bosch kjetronic and. This manual will describe the kjetronics function and its particu lar features.
Kjetronic fuel injection system k jetronic is a mechanically and hydraulically operated fuel injection pump, introduced by bosch gmbh in the year 1973. K jetronic since its introduction, the k jetronic gasoline injection system has proved itself in millions of vehicles. The kjetronic is a mechanical fuel injection system which injects continuously and which needs no form of drive whatsoever. Bosch kjetronic fuel injection systems volvo owners club. Variants of d jetronic were used by other manufacturers ford, toyota, etc. I am also addressing the basic settings involved in adjusting the fuel mixture here. If in doubt, spray break cleaner on pipes, hoses, injectors, intake manifold and map sensor. Bosch l jetronic l jetronic rx7 brought to you by the team at created date. Kjetronic since its introduction, the kjetronic gasolineinjection system has proved itself in millions of vehicles. It is connected to a bimetal plate heater that is located inside and used to regulate the fuel pressure.
It should be more like a fine spray and less like a fountain. Apr 02, 2010 porsche 924 k jetronic injection system test. Mechanical fuel injection bosch k jetronic, bosch k jetronic fig. 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. Continuous injection system found on european cars and volkswagen models assembled in the u. The lower connection hose is attached to the pipe that is connected to the k jetronic fuel distributor control input. Home video course bosch ke3 jetronic 539 89 injection system manual 328 mondial read online available as pdf. Jetronic controls fuel supply while the electronic ignition system provides optimal ignition control. There is also a 12v power socket on the top of the cpr. Aug 31, 2009 bosch k jet mixture setting posted on august 31, 2009 by larry fletcher comments off on bosch k jet mixture setting after assembly of the fuel system, run the fuel pump and depress the air flow sensor plate for a couple of seconds to bleed air out of the fuel distributor.
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