This system replaces the electronic system of earlier years. Add to this the sheer weight of the 116s and their. Assuring you of quality and reliability at a cost effective price. 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. Using the kjet fuel pressure test kit notes from experience with 1979 volvo 244dl and a 1983 volvo 244ti turbo. Its wide use throughout the industry justifies its coverage in this manual.
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. Gasolineinjection systems overview 16 mmotronic engine management mmotronic. Approximately up until 1994 mechanical fuel injection systems have been installed on certain mercedes, audi, volkswagen, ford etc. System overview 18 fuel system 20 operatingdata acquisition 28 operatingdata processing 38. Bosch kjetronic fuel injection part 1 volvo owners club. Between the years 1973 and 1995, the highly reliable, mechanical multipoint injection system kjetronic was installed as original equipment in seriesproduction vehicles. Line or system pressure readings will help define a problem with the fuel delivery system such as the pumps and filter. The basic principle of operation is that the accelerator pedal controls the movement of 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. Bosch djetronic fuel injection manual pon27pypo040 idocpub. This definition appears rarely and is found in the following acronym finder categories. 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. Bosch licensed the concept to many automobile manufacturers. A thorough understanding of the various components is required before working on k jetronic fuel systems. 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. 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. Youve built a mechanical fuelinjection pump, from the days before digital engines. Kjet mechanical fuel injection depends on continuous regulation and variation of fuel pressure delivered to the injectors. Mechanical fuel injection bosch kjetronic, bosch k jetronic. What links here related changes upload file special pages permanent link page.
Prior to ljetronic, mechanical fuel injection systems had proven that directly injecting atomized fuel into the cylinder resulted in better engine operation. If i replace the preasure control unit, the line will end up being too short. 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. The fuel distribu tor allocates this fuel to the injection the kjetronic is a mechanically and valves of the individual cylinders. There are several variations of the technology offering technological development and refinement. Bosch kjetronic fuel injection part 2 volvo owners club. Boschs djetronic was the first massproduction electronic fuel injection. Fuel injection system the ke2jetronic fuel injection system is fitted to turbocharged engines. Fuel pressure testers free delivery possible on eligible purchases. Bosch k jetronic fuel injection manual pdf document. 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 jetronic thus provided impetus to the success of electronic systems. We found a pdf of how to disassemble and reassemble the wur, but of course this requires new bits to put in it. Jetronic fuel injection this ulde is designed to be used in con unction with robert bosch jetronic service anual.
The bosch djetronic electronic fuel injection system is composed of 3 major. Having trouble with bosch kjetronic cis bob is the oil guy. 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. Then tested and calibrated to manufacturers original specification. All information, illustrations and specifications con. Fuel injection system kjetronic naturally aspirated engines are fitted with the bosch kjetronic continuous fuel injection system. 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. Jetronic is a trade name of a fuel injection technology for automotive petrol engines, developed. Gregs bosch ljetronic fuel injection idle adjustment, diagnostic and tune up page, latest revision sept. Fuel tank the fuel tank contains a fuel gauge sending unit, a filler tube and a fuel pump. Gasoline fuelinjection system kjetronic gasolineengine management technical instruction published by. 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. Mechanical fuel injection bosch kjetronic, bosch k jetronic fig.
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. Ihe greatesl poss,ble amounl of s air would be desirable. It differentiates from the lejetronic for having, in addition to the injection system, also the ignition system incorporated in the command unit. Today, it has been superseded by gasoline injection systems which thanks to. It has the m110 engine fitted with bosch k jetronic fuel injection and it doesnt have an oxygen sensor. Bosch kjetronic cis mechanical fuel injection repair. Kjetronic fuel injection tester with case ta 33865. D some of these have thin spots from rubbing on other parts. Robert bosch automotive service djetronic fuel injection. Bosch ljetronic fuel injection brandeis university. 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. Bosch is the largest supplier of fuelinjection systems in the world.
Djet bosch d jetronic fuel injection acronymfinder. Cosworth dfv is a lucas fuel injection system model. Ljetronic fuel injection technical troubleshooting article. It features a lambda probe aggregated to the injection system, installed in the exhaust pipe. This manual is designed to assist the technician unfamiliar with robert bosch fuel injection systems in locating faults in the ljetronic system, isolating. Technical data sheets bosch k jetronic fuel injection. Bosch cis fuel injection age related issues with kent bergsma. If the vehicle has an automatic transmission, put into neutral c. This is accomplished by placing a zener diode across the pcm driver transistor or mosfet, as illustrated in fig. The following table is a guide to the fuel paths marked by each blue arrow in figure 6. Where can i buy the plastic fuel line material the preasure control line is. Combining this direct injection theory with electronic sensors, valves.
Robert bosch gmbh, 2000 postfach 3002 20, d70442 stuttgart. The fuel filter contains a paper element with a mean pore size of 10 m backed up by a fluff trap. 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. Tighter emission laws worldwide ensured that the electronic fuel injection finally prevailed. Chapter of djetronic articles by drdjet describes systematic fault finding troubleshooting and repair on your bosch fuel injection systemfehlersuche. 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. Jetronic controls fuel supply while the electronic ignition system provides optimal ignition control. In the program, the injection pump was replaced with the measured pressure at the junction between the pump and highpressure pipe. 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. The engines fuel requirements a sparkignition engine needs a particular airfuel ratio in order to operate. It has no fuel rail, but instead relies on the fuel distibut.