Nov 21, 2009 ning of the era of fuel injection at these were joined by bosch mono bosch, but there was still a long path jetronic in 1987. 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. Bosch kjetronic fuel injection part 1 volvo owners club. There are several variations of the technology offering technological development and refinement. 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. The bosch d jetronic electronic fuel injection system is composed of 3 major subsystems. Vw ljetronic fuel injection workshop manual pdf yumpu. Way more information than you ever wanted on how to fell a tree. There is no scan tool to tell you where to look for the fault. Bosch l jetronic fuel injection troubleshooting, maintenance. The d jetronic system uses constant fuel pressure and flow, so that only injection duration needs to be modified to control airfuel mixture. The l jetronic aod ils variants are electro nically controlled fuelinjection systems solenoidopersle jetronic in iha bosch technical instruclion series. 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.
Bosch licensed the concept to many automobile manufacturers. Spec alfa romeo gtv6s, milanos, and 19821989 spiders, bmw e12 5 series and various 3 series cars, the datsun 280z and 280zx, all u. Another excellent source of general info on the bosch injection system from the early d jetronic electronic to k jetronic mechanical constant injection all the way to the later variations of the motronic engine management with lambda exhaust sensing to allow the system to function closedloop, is the book. Left this is the original bosch jetronic injector with its ev1 connector that is also called the minitimer. 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. The l jetronic aod ils variants are electro nically controlled fuelinjection systems solenoidopersle bosch k jetronic, bosch k jetronic fig. Since their introduction, the jetronic fuel injection systems have proved themselves millions of times over under the harsh conditions of everyday driving. 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. Bosch ljetronic fuel injection idle adjustment diagnostic. The following table is a guide to the fuel paths marked by each blue arrow in figure 6. Mechanical fuel injection bosch k jetronic, bosch k jetronic fig. The bosch d jetronic is an electronical gasoline injection system which was introduced in 1967.
The bosch ljetronic also called afcair flow controlled fuel injection was put into usspec type 4s in the last model year 1974. If in doubt, spray break cleaner on pipes, hoses, injectors, intake manifold and map sensor. The djetronic system measures incoming airflow by monitoring. Elementary ljetronic, two lifewithlis morethanjust enginebackfire and damaged air flow sensors. This manual will describe the kjetronics function and its particu lar features. Combustion in the gasoline engine the sparkignition or ottocycle engine 2 gasolineengine management technical requirements 4 cylinder charge 5 mixture formation 7 gasolineinjection 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. Bosch k jetronic fuel injection manual pdf document. Another excellent source of general info on the bosch injection system from the early djetronic electronic to kjetronic mechanical constant injection all the way to the later variations of the motronic engine management with lambda exhaust sensing to allow the system to function closedloop, is the book. This is why engines equipped with the bosch motronic med 7 direct petrol injection system will be used for the first time in the lupo fsi and golf fsi. The bosch djetronic electronic fuel injection system is composed of 3 major subsystems. If any you 560 guys want to help flesh it out, post component pics like the ovpr in post five or pertinent diagrams to this thread ill edit them into. It was primarily based on patents that bosch licensed from the bendix corporation.
The earliest bosch installations were the djetronic and ljetronic systems, and we can still find their operating principles at work in vehicles for the 2001 model year. 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 pulse generator is installed in the distributor and measures the engine speed. Center unique within the gm ls style injectors is the early gm truck version that is just slightly taller than the later ls3 injector using the minidelphi connector. The l jetronic aod ils variants are electro nically controlled fuelinjection systems solenoidopersle editor inchief. Kpa short pulse limit short pulse adder minimum injector pulse default injector pulse and possibly fuel to wall impact factor if it needs to be changed for these injectors as well. Bosch ke jetronic system the bosch ke jetronic fuelinjection system is fitted to escort rs turbo models and is a further development of the k jetronic system. This is the only injector that uses this electrical connector. Ljetronic the bosch ljetronic also called afcair flow controlled fuel injection was put into usspec type 4s in the last model year 1974. Detach the operational relay set from the relay block as well as from the safety appliance located under the steering tube. 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. Pdf bosch automotive electrics and automotive electronics. Youmayassociate offidle hesitationwithdjetronic, but its not uncommon for a misadjusted throttle switch to cause the same problem on ljet systems.
Mechanical fuel injection bosch kjetronic, bosch k jetronic fig. So jaguar suddenly had no solution and bosch could only supply a product for 4, 6 and 8cylinder engines. Aug 11, 2014 gasolineengine management gasoline fuelinjection system kjetronic technical instruction. Anyhow here is the link bosch kjetronic fuel injection manual. Bosch classic, remakes, ignition pulse generator, d jetronic. Now let us have a look how bosch ke jetronic fuel injection system can be diagnosed and repaired on an example of audi 100 2. Based on the number of questions we get about bosch djetronic fuel injection, many owners as well as many professional mechanics find its operation and maintenance arcane and mystifying.
This particularly cost to travel on the way to fuel injection for efficient singlepoint injection unit passenger cars. Domestic carmakers adopted electronic fuel injection extensively on breadandbutter production cars in the early 80s. For those not familiar with bosch ljetronic fuel injection you may want to start with l jetronic seminar in pdf format. Since its introduction, the kjetronic gasolineinjection system has pro ved itself in. Offidle and postcranking only work below a r616 specified level of resistance on the coolant temperature ntc. 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 new perspectives in automotive design. Gtv6 and milano, however if you own any car with bosch ljetronic injection the article will still help.
Apr 22, 2011 1986 hc, 1987 hc, 1988 x180, bosch k jetronic continous injection system cars should have a separate thread because of their unique fuel system and unique problems. The offidle enrichment, postcranking enrichment and and coastingcutoff are on this board. So jaguar asked lucas to use bosch d jetronic and extend it for 12cyinder engines. Bosch ljetronic fuel injection idle adjustment, diagnostic and tune up page for usa models of alfa romeo spiders 19821989. Direct petrol injection system with bosch motronic med 7. The earliest bosch installations were the d jetronic and l jetronic systems, and we can still find their operating principles at work in vehicles for the 2001 model year. Download bosch automotive electrics and automotive electronics ebook free in pdf and epub format. 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. Read bosch automotive electrics and automotive electronics online, read in mobile or kindle. While new carburated engines were used in the european markets, vw adapted the ljetronic for the type 4 in the us due to more. Automotive equipment business sector, department for automotive services, technical publications khpdi2. They have the potential to reduce fuel consumption by up to 15% compared to a similar engine with intake manifold injection. The le jetronic system is analog, and therefore it does not keep in memory possible damage that may occur.
Pulse generator trigger, djetronic f 026 t03 035 bosch classic. Bosch classic, remakes, ignition pulse generator, djetronic. The engines fuel requirements a sparkignition engine needs a particular airfuel ratio in order to operate. Gasoline engine management gasoline fuel injection system k jetronic technical instruction published by robert bosch gmbh, 2000 postfach 300220, d 70442 stuttgart.
In this system, the injection command unit controls only the fuel system. Engine and obd diagnostic codes faq home volvo maintenance faq for 7xx9xx90 cars fuel injection and ignition diagnostic procedures in lhjetronic 2. 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. Combined ignition system and luel injection system molfonlc. Bosch ljetronic fuel injection troubleshooting, maintenance. The d jetronic system developed by bosch in the early 1960s was the first massproduction electronic fuel injection system. This signal is then brought to the upper board of the ljetronic. Limiting factor was the current that the bosch 6calinder ecu could supply to injection valves. Its wide use throughout the industry justifies its coverage in this manual. 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. Le is the german designation of the european version of their air flow meter, with lu being the designation of the us version, i.
Bosch le jetronic bmw copyright equiptech 1 page 1 ft that fiat it 9. A thorough understanding of the various components is required before working on k jetronic fuel systems. 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. Chapter of d jetronic articles by drdjet describes systematic fault finding troubleshooting and repair on your bosch fuel injection system. Le1 jetronic, le2jetronic, le3jetronic 19811991edit. Robert bosch gmbh, 2000 postfach 30 02 20, d70442 stuttgart. Le is the german designation of the european version of their air flow meter, with lu being the designation. 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. Bosch ke jetronic manual pdf bosch ke jetronic manual pdf bosch ke jetronic manual pdf bosch ke jetronic manual pdf bosch ke jetronic manual pdf for download contains important information, media and a detailed explanation about bosch ke jetronic manual pdf, its contents of the package, names of things and what they do, setup, and operation. This was a microsoft powerpoint document, presented at the 1999 e12 fall fest in virginia beach, va. For those not familiar with bosch l jetronic fuel injection you may want to start with l jetronic seminar in pdf format.
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