Robert bosch gmbh, 2000 postfach 3002 20, d70442 stuttgart. In the program, the injection pump was replaced with the measured pressure at the junction between the pump and highpressure pipe. Cosworth dfv is a lucas fuel injection system model. The basic principle of operation is that the accelerator pedal controls the movement of the. Bosch ljetronic fuel injection brandeis university.
Djet bosch d jetronic fuel injection acronymfinder. Certain operating conditions make it necessary to correct the mixture accordingly. Where can i buy the plastic fuel line material the preasure control line is. Between the years 1973 and 1995, the highly reliable, mechanical multipoint injection system kjetronic was installed as original equipment in seriesproduction vehicles. The following table is a guide to the fuel paths marked by each blue arrow in figure 6. Fuel injection system the ke2jetronic fuel injection system is fitted to turbocharged engines. Gregs bosch ljetronic fuel injection idle adjustment, diagnostic and tune up page, latest revision sept. Approximately up until 1994 mechanical fuel injection systems have been installed on certain mercedes, audi, volkswagen, ford etc. Chapter of djetronic articles by drdjet describes systematic fault finding troubleshooting and repair on your bosch fuel injection systemfehlersuche. Gtv6 and milano, however if you own any car with bosch ljetronic injection the. Mechanical fuel injection bosch kjetronic, bosch k jetronic. The jetronic thus provided impetus to the success of electronic systems.
If the vehicle has an automatic transmission, put into neutral c. We found a pdf of how to disassemble and reassemble the wur, but of course this requires new bits to put in it. It has no fuel rail, but instead relies on the fuel distibut. A thorough understanding of the various components is required before working on k jetronic fuel systems.
The bosch djetronic electronic fuel injection system is composed of 3 major. Ke3 jetronic pdf mercedes suggests that special tools are required to adjust the mixture on the bosch ke3jetronic. 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 fuel injection part 2 volvo owners club. Bosch le jetronic bmw copyright equiptech boschlejetronic thereismuchconfusionabouttheactualtypeofinjectionsystemfittedtomanybmwmotorcarsduringtheperiod1980to. Youve built a mechanical fuelinjection pump, from the days before digital engines. The engines fuel requirements a sparkignition engine needs a particular airfuel ratio in order to operate. Its wide use throughout the industry justifies its coverage in this manual. It has the m110 engine fitted with bosch k jetronic fuel injection and it doesnt have an oxygen sensor. The main difference between carburetor and fuel injection system carburetorzfuel is atomized by processes relying on the air speed greater than fuel speed at the fuel nozzle, zthe amount of fuel drawn into the engine depends upon the air velocity in the venturi fuel injection systemzthe fuel speed at the point of delivery is greater than the air speed to atomize the fuel.
Add to this the sheer weight of the 116s and their. The engine is pretty young, as it only has about 60,000 kms. Kmi remanufactured kejetronic fuel distributors are carefully remanufactured by our technicians. Fuel pressure testers free delivery possible on eligible purchases. Bosch cis fuel injection age related issues with kent bergsma. All information, illustrations and specifications con. Jetronic controls fuel supply while the electronic ignition system provides optimal ignition control. Kjet mechanical fuel injection depends on continuous regulation and variation of fuel pressure delivered to the injectors. There are several variations of the technology offering technological development and refinement. Turn off air conditioning if fitted the average system pressure on all kjetronic fuel systems should be 520 kpa. Basically, kjetronic bosch cis continuous injection system is well known all around the world as a mechanical injection system that supplies fuel continuously to each of the 4 or 6 jet nozzles or. Jetronic is a trade name of a fuel injection technology for automotive petrol engines, developed. The fuel distribu tor allocates this fuel to the injection the kjetronic is a mechanically and valves of the individual cylinders.
Prior to ljetronic, mechanical fuel injection systems had proven that directly injecting atomized fuel into the cylinder resulted in better engine operation. This definition appears rarely and is found in the following acronym finder categories. Tighter emission laws worldwide ensured that the electronic fuel injection finally prevailed. Using the kjet fuel pressure test kit notes from experience with 1979 volvo 244dl and a 1983 volvo 244ti turbo. Fuel tank the fuel tank contains a fuel gauge sending unit, a filler tube and a fuel pump. D some of these have thin spots from rubbing on other parts. The fuel filter contains a paper element with a mean pore size of 10 m backed up by a fluff trap. Ljetronic fuel injection technical troubleshooting article. Bosch kjetronic fuel injection part 1 volvo owners club. 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. Line or system pressure readings will help define a problem with the fuel delivery system such as the pumps and filter. Robert bosch automotive service djetronic fuel injection. The design approach used by bosch for the ljetronic attempted to overcome some of the limitations found in previous fuel injection systems as well as to meet the.
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 type of high pressure fuel pump is denoted as a roller cell pump, with the fuel entering the pump and being compressed by rotating cells that force it through the pump at high pressure. This system replaces the electronic system of earlier years. Bosch kjetronic cis mechanical fuel injection repair. If i replace the preasure control unit, the line will end up being too short. Bosch is the largest supplier of fuelinjection systems in the world. 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. It differentiates from the lejetronic for having, in addition to the injection system, also the ignition system incorporated in the command unit. Bosch licensed the concept to many automobile manufacturers. What links here related changes upload file special pages permanent link page. Boschs djetronic was the first massproduction electronic fuel injection. This is accomplished by placing a zener diode across the pcm driver transistor or mosfet, as illustrated in fig.
Gasoline fuel injection system l jetronic bosch pdf gasoline fuel injection system l jetronic bosch pdf download this manual may contain attachments and optional equipment that are not available in your area owner manuals bosch home appliances click book now to see if you can book a service visit with a bosch technician or if a bosch. 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. The ljetronic was the first massproduced, fully electronic fuel injection system. Combining this direct injection theory with electronic sensors, valves. Gasolineinjection systems overview 16 mmotronic engine management mmotronic. 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 kjetronic system overview fuel supply 14 fuel metering 18 adapting to operating conditions 24 supplementary functions 30 exhaustgas treatment 32 electrical. Bosch djetronic fuel injection manual pon27pypo040 idocpub. 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. Then tested and calibrated to manufacturers original specification. Gasoline fuelinjection system kjetronic gasolineengine management technical instruction published by. Fuel injection system kjetronic naturally aspirated engines are fitted with the bosch kjetronic continuous fuel injection system. Fuel filter the fuel filter retains particles of dirt which are present in the fuel and which would otherwise have an adverse effect on the functioning of the injection system. Today, it has been superseded by gasoline injection systems which thanks to. Having trouble with bosch kjetronic cis bob is the oil guy.
Fuel injection electronic gasoline fuelinjection systems from the mid 1970s to the mid 1990s and later are all very similar in design and operation because they share a common beginning with robert bosch gmbh, a german company. Bosch k jetronic fuel injection manual pdf document. System overview 18 fuel system 20 operatingdata acquisition 28 operatingdata processing 38. This extra fuel cant be accurately controlled, so the engineer must adjust the energy held within the flyback voltage to control the closing rate of the injector. Kjetronic cis fuel system diagram shown below is a schematic diagram of fuel lines in a kjetronic as a whole with noise damper and drain line at the fuel accumulator. Jetronic fuel injection this ulde is designed to be used in con unction with robert bosch jetronic service anual. Ihe greatesl poss,ble amounl of s air would be desirable. History of fuel injection when rudolph diesel contracted with augsburg and krupp of germany in1893 to develop a moreefficient internal combustion engine, one of hisobjectives was to use as fuel the mountainous piles of powdered coalwhich.
Technical data sheets bosch k jetronic fuel injection. Kjetronic fuel injection tester with case ta 33865. Assuring you of quality and reliability at a cost effective price. Mechanical fuel injection bosch kjetronic, bosch k jetronic fig. It features a lambda probe aggregated to the injection system, installed in the exhaust pipe. Mixture control unit the task of fuel management is to meter, or allocate, the correct quantity of fuel which corresponds to the amount of air drawn in by the engine. This manual is designed to assist the technician unfamiliar with robert bosch fuel injection systems in locating faults in the ljetronic system, isolating.
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