Apart from minor alterations the basic principles of the hydraulics and mechanics used on the kjetronic system are unchanged on the kejetronic system. The testarossa when released in 1984 was fitted with the bosch k jetronic fuel injection system. Bosch cis fuel injection age related issues with kent. Electronically controlled systems the fuel is supplied by an electrically driven fuel pump which develops the pressure necessary for injection. K jetronic was used for many years between 1974 and the mid1990s by bmw, lamborghini, ferrari, mercedesbenz, volkswagen, ford, porsche, audi, saab, delorean, and volvo. Whilst ive got it out of the car i thought id give you a quick look at a fuel distributor from a bosch ke jetronic or cis injection system. The engine is pretty young, as it only has about 60,000 kms. 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. Bosch kjetronic and kejetronic mechanical fuel injection systems. K jetronic fuel injection system, the ignition system and the mechanical system of the engine compression, valve timing, etc. 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. Gasoline fuel filter fuel filter injection the fuel filter retains par. By the way, only two companies, bosch and lucas, have developed almost all of the various fuel injection systems.
Today, it has been superseded by gasoline injection systems which thanks to. Bosch ljetronic and motronic fuel injection systems repair guide. The bosch ljetronic fuel injection system is electronically controlled to regulate the fuel supply in relation to the air flow. It is a euromarket 1979 280ge lwb with a manual transmission. This synthesis, comprising the mechanical basic functions coupled with electronic adap tation and opti mization functions, is the kejetronic. The mechanical k jetronic, which had already proven itself as a multipoint fuel injection system, was therefore re. Nov 21, 2009 supply system, there is always cool fuel fig. Kmi service exchanged k jetronic fuel distributors are carefully remanufactured by our technicians. Fuel injection system the ke2 jetronic fuel injection system is fitted to turbocharged engines. Prior to ljetronic, mechanical fuel injection systems had proven that directly injecting atomized fuel into the cylinder resulted in better engine operation.
Especially fuel injection and ignition was my soecial interest since i bought my fist oldtimer in 2007, a mercedesbenz 450 sl from 1973. 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. 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. Bosch k jetronic fuel injection manual linkedin slideshare. Then tested and calibrated to manufacturers original specification. The fuel system comprises a centrally mounted fuel tank, electricallyoperated fuel pump and bosch kjetronic or kejetronic continuous injection system. Bosch kejetronic system the bosch kejetronic fuelinjection system is fitted to escort rs turbo models and is a further development of the kjetronic system. It features a lambda probe aggregated to the injection system, installed in the exhaust pipe.
The bosch l jetronic fuel injection system is electronically controlled to regulate the fuel supply in relation to the air flow. The kjetronic is a mechanical fuel injection system from bosch. Chapter of djetronic articles by drdjet describes systematic fault finding troubleshooting and repair on your bosch fuel injection system. The only vehicle that runs a higher pressure than this is the porsche turbo carrara models from 1975 to 1979 which. What is most interesting is that lucas is more popular on the racing vehicles while bosch has developed those very first injection systems for diesel engines. Bosch kjetronic fuel injection manual boschtech12d. K jetronic fuel systems have an electric safety circuit which prevents the. I would prefer to just lift the system from one car and drop it in the other. Genuine porsche 911 197577 cis kjetronic fuel injection system complete used. Where can i buy the plastic fuel line material the preasure control line is. I followed my scientific curiosity to discover every special subject on boschs djetronic and today i consider myself a specialist on that. Kjetronic flooding even with correct fuel pressures 200 1979.
K jetronic depends on the depression of a plate to control the volume of fuel injected, hence the big round thing with tubes out of it. The electric fuel pump delivers more fuel electric fuel pump kje. If in doubt, spray break cleaner on pipes, hoses, injectors, intake manifold and map sensor. Assuring you of quality and reliability at a cost effective price. The fuel injectors have an opening pressure of between 3,8 bar.
Purely mechanical injection systems are unable to comply with these farreaching stipulations. Combining this direct injection theory with electronic sensors, valves. The ljetronic was the first massproduced, fully electronic fuel injection system. 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. Kjetronic 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. The l jetronic was the first massproduced, fully electronic fuel injection system. 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. Detach the operational relay set from the relay block as well as from the safety appliance located under the steering tube. 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 bosch s d jetronic and today i consider myself a specialist on that. Mechanical fuel injection bosch kjetronic, bosch k jetronic fig. The amount of air sucked in by the engine is controlled by a throttle valve and measured by an airflow sensor.
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. Bosch ke jetronic manual bosch k jetronic service manual bosch k jetronic manual mercedes bosch ke jetronic workshop manual bosch d jetronic fuel injection manual manual k jetronic l jetronic k jetronic le jetronic k jetronic deutsch k jetronic german bosch manual bosch manual she bosch fsa 740 using manual bosch freezer manual bosch. Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector all diesel engines use fuel injection by design. Beginning in 1982 for the spider, and 1981 for the gtv6, alfa adopted bosch ljetronic fuel injection. Having trouble with bosch kjetronic cis bob is the oil guy.
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. I can get my hands on a k jet 280se donor car as we speak but dont want to waste my time if the hardware is not usable. The kjetronic system was installed as original equipment in series production vehicles in the years 1973 through 1995. 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.
General information and precautions bosch kjetronic and. The mechanical kjetronic, which had already proven itself as a multipoint fuelinjection system, was therefore re. Chrysler used a continuous fuel injection system on the 19811983 imperial. Bosch kjetronic fuel injection systems volvo owners club. The green book has an adjustment not mentioned in haynes or charles probsts bosch fuel injection and engine management which is turning the mixture adjustment screw until fuel just begins to flow out of a fuel distributor. Between the years 1973 and 1995, the highly reliable, mechanical multipoint injection system kjetronic was installed as original equipment in seriesproduction vehicles. Commonly called continuous injection system cis in the usa. The most common automotive continuous injection system is bosch s k jetronic, introduced in 1974. 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. Between the years 1973 and 1995, the highly reliable, mechanical multipoint injection system k jetronic was installed as original equipment in seriesproduction vehicles. 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. Mechanical fuel injection bosch k jetronic, bosch k jetronic fig. Gasolineengine management gasoline fuel injection system k jetronic technical instruction published by. Automotive equipment business sector, department for automotive services, technical publications khpdi2.
The bosch fuel injection and engine management is a must have book for the serious automotive enthusiast or professional fuel injection theory is as important to your cars performance as are the wheels and suspension system. The mechanical fuel injection system has recently been overshadowed by. Popular with porsche, mercedes and vwaudi in the 80s. The fuel return line was also eliminated and a check ball installed in its place. Genuine porsche 911 197577 cis k jetronic fuel injection system complete used.
D some of these have thin spots from rubbing on other parts. Is the kjet back end hardware for a m110 the same as the m117 or is the fuel pump and accumulator different because one is for a v8 rather than the 6. Rwd kjetronic flooding even with correct fuel pressures. The average system pressure on all kjetronic fuel systems should be 520 kpa. Chapter of d jetronic articles by drdjet describes systematic fault finding troubleshooting and repair on your bosch fuel injection system.
Prior to l jetronic, mechanical fuel injection systems had proven that directly injecting atomized fuel into the cylinder resulted in better engine operation. Do not confuse the electric fuel pump with the injection pump. Since its introduction, the k jetronic gasoline injection system has pro ved itself in millions of vehicles. 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. Find great deals on ebay for k jetronic and bosch k jetronic. This is an inline pressure tester which indicates problem sources control pressure regulator, fuel distributors or other specific fuel. Troubleshooting symptoms kjetronic is a mechanical system. In 1988 this was upgraded to the new ke jetronic system with elements of electronic control added. Is the k jet back end hardware for a m110 the same as the m117 or is the fuel pump and accumulator different because one is for a v8 rather than the 6. The following table is a guide to the fuel paths marked by each blue arrow in figure 6. The kjetronic system was installed as original equipment in series. The only vehicle that runs a higher pressure than this is the porsche turbo carrara models from 1975 to 1979 which have a system pressure of 600 kpa.
General information and precautions bosch kjetronic and ke. Bosch kejetronic system description fuel injection. The ke2jetronic fuel injection system is fitted to turbocharged engines. Now let us have a look how bosch kejetronic fuel injection system can be diagnosed and repaired on an example of audi 100 2. The system is used in conjunction with a turbocharger on rs turbo models. These fuel injection systems were considered to be really reliable and trustworthy.
Bosch developed many more types of electronic fuel injection after d jetronic l jetronic, k jetronic, etc. Petrol engines can use gasoline direct injection, where the fuel is directly delivered into the combustion chamber, or indirect injection where the fuel is mixed with air before the intake. The average system pressure on all k jetronic fuel systems should be 520 kpa. Tthe photo obviously shows the system as fitted to a four cylinder cvh in an old escort but the principles of operation within this guide should be the same for its other applications wether capri 2. As with our fuel distributors, kmi service exchanged kjetronic warm up regulators are fully remanufactured and calibrated to manufacturers original specification on our purpose built test and calibration bench. Continuous injection system found on most late model european cars and volkswagen models assembled in the u. Cis can flood if the key is on and the air flow meter afm plate is lifted so the fuel pump runs, unless yours is rewired so it is on all the time. 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. 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. 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. Approximately up until 1994 mechanical fuel injection systems have been installed on certain mercedes, audi, volkswagen, ford etc. I can get my hands on a kjet 280se donor car as we speak but dont want to waste my time if the hardware is not usable.
The bosch d jetronic is an electronical gasoline injection system which was introduced in 1967. Robert bosch gmbh, 2000 postfach 30 02 20, d70442 stuttgart. Bosch k jetronic and ke jetronic fuel injection volvo owners club. All mercedesbenz fuel injected engines are equipped with electric fuel pumps.
The heart of this system is the airflow meter, which measures the amount of air being required by the engine. Usa spec cars featured even more electronic controls in an attempt by bosch ferrari to comply with the strengthening emissions control introduced in. Bosch k jetronic fuel injection manual pdf document. Mar 02, 2012 bosch k jetronic fuel distributor seal.
If i replace the preasure control unit, the line will end up being too short. Bosch k jetronic fuel distributor quick look youtube. Two papers were published in the bosch technical journal that gave overall descriptions of the d jetronic system. Bosch kejetronic system description free download as pdf file. 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 the quality of the exhaust gases emitted by the vehicle. With these systems, the fuel is delivered in a conventional manner from the fuel tank, via a rear mounted fuel pump, up to the fuel distribution unit. It has the m110 engine fitted with bosch k jetronic fuel injection and it doesnt have an oxygen sensor. Verify that these systems are in proper working order before proceeding further. The point not stressed in all this is that k jetronic is a mechanical injection system, although very late ones had o2 sensor input loop. The bosch djetronic is an electronical gasoline injection system which was introduced in 1967. 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.
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