How to understand, service and modify probst, c on. Somethingas simple as testing fuel pressures requires an under standing of howthe system controls fuel pressure and mixture. Wewill give you a brief overview of the system and its functions, then show you the tools and techniques that are required to test the. Product information automotive gasoline systems diagnostics and. Jetronic manual bosch ke jetronic workshop manual bosch k jetronic manual mercedes bosch k jetronic service manual bosch d jetronic fuel injection manual manual k jetronic k jetronic l jetronic le jetronic k. Electronically controlled systems the fuel is supplied by an electrically driven fuel pump which develops the pressure necessary for injection. In the case ofthe bosch cise fuel injection sys tem,thereis morethanmeets the eye. Cise, ke jetronic, fuel injection training created date.
Testing gas fuel injectors early bosch mfi fuel injection part 4 w kent bergsma duration. Since their introduction, jetronic fuel injection systems have proved. In bosch enginemanagement systems featuring electronic throttle control etc, the cylindercharge control subsystem determines the required inductionair. The task of a fuel injection system is to supply precise amount of fuel to the. Automotive equipment business sector, department for automotive services, technical publications khpdi2. 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. The bosch d jetronic fuel injection system was used by vw in the type iii in 1968. 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 k jetronic is a mechanical fuel injection system which injects continuously and which needs no form of drive whatsoever. The warmup regulator, also called the control pressure regulator, lowers the control pressure of the k jetronic when the engine is cold. Gasoline fuel injection system l jetronic bosch pdf download this manual may contain attachments and optional equipment that are not available in.
K jetronic system overview the k jetronic is a mechanically and hydraulically controlled fuel injection 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. Gasoline fuel injection system l jetronic bosch pdf download this manual may contain attachments and optional equipment that are not available in your. The electric fuel pump delivers more fuel electric fuel pump kje. Bosch djetronic fuel injection note s compilation swem. File type pdf bosch k jetronic fuel injection service repair manual bosch k jetronic fuel injection service repair manual bosch k jetronic cis explained bosch k jetronic fuel distributor quick look whilst ive got it out of the car i thought id give you a quick look at a. 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. Bosch l jetronic fiat fuel injected engines guide file type. This was the first electronic fuel injection system to be fitted to a production car. A computer controls the injection and ignition systems with reference to shared optimization criteria. This is how the moving part should look like in rest position. The d jetronic system uses constant fuel pressure and flow, so that only injection duration needs to be modified to control air fuel.
Kjetronic fuel injection system k jetronic is a mechanically and hydraulically operated fuel injection pump, introduced by bosch gmbh in the year 1973. The following table is a guide to the fuel paths marked by each blue arrow in figure 6. Sinds it is a horror story to replace this thing on a 8. L jetronic system fuel injectors n open when energized by ecu not continuous as k jetronic. For this reason, the wellproven k jetronic was retained as the basic injection system but. Since its introduction, the k jetronic gasoline injection system has pro ved itself in millions of vehicles. The l jetronic is an electronically controlled fuel injection system which has the advantage of direct air flow sensing. The bosch djetronic electronic fuel injection system is composed of 3 major. 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.
Description the bosch d jetronic electronic fuel injection system is composed of 3 major subsystems. Bosch k jetronic and ke jetronic fuel injection volvo owners club. The purely mechanical systems are not able to fulfill these stringent requirements. 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.
The bosch l jetronic fuel injection system is electronically controlled to regulate the fuel supply in relation to the air flow. Jetronic controls fuel supply while the electronic ignition system provides optimal ignition control. 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. Digital data processing and microprocessors make it possible. Between the years 1973 and 1995, the highly reliable, mechanical multipoint injection system k jetronic was installed as original equipment in seriesproduction vehicles. Understanding d jetronic fuel injection an overview of bosch d jetronic in jaguar v12s 19751980.
Bosch ke3 jetronic 539 89 injection system manual 328 mondial to read online or download as pdf. Bosch kjetronic fuel injection manual boschtech12d. The basic principle of operation is that the accelerator pedal controls the movement of the. A thorough understanding of the various components is required before working on k jetronic fuel systems. Robert bosch gmbh, 2000 postfach 30 02 20, d70442 stuttgart. E21 3er 323i models are equipped with the bosch k jetronic system, whereas e30 3er 320i and 325i models are fitted with the bosch l jetronic system. Section b2 fuel injection system k jetronic naturally aspirated engines are fitted with the bosch k jetronic continuous fuel injection system. 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 licensed the concept to many automobile manufacturers. The mechanical fuel injection system has recently been overshadowed by. This article covers k jetronic injection for e21 models, also injected e12 and early e28 5er.
Bosch kjetronic and kejetronic mechanical fuel injection systems. Gasoline injection systems, mechanical injection systems and electronic systems in particular, are the k jetronic system operates by better at maintaining air fuel mixtures injecting continually, without an exter within precisely defined limits, which nal drive being necessary. Cis fuel injection parts partsklassik classic parts for. Having recently sorted out a problem with mine, and hopefully understanding its. The k jetronic was used as original equipment in massproduced vehicles between 1973. 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. Bosch k jetronic mechanical fuel injection troubleshooter. The primary pressure regulator that is installed in the fuel distributor housing maintains a. Gasolineengine management gasoline fuel injection system k jetronic technical instruction published by. Fuel injection system the ke2 jetronic fuel injection system is fitted to turbocharged engines. 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. Bosch cis fuel injected engine cold and hot start problems duration.
Scribd is the worlds largest social reading and publishing site. This success is a result of the advantages which fuel injection can offer when considering todays demands for economy, performance, and cleaner exhausts. Playing with your k jetronic warm up regulator, or wur. 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. 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. There are several variations of the technology offering technological development and refinement. Gasoline fuel injection system ljetronic bosch pdf. Mechanical fuel injection bosch k jetronic, bosch k jetronic fig. File type pdf bosch l jetronic fiat fuel injected engines guide file type the bosch l jetronic system is used on all u. Most of the information i will use comes from course notes i have from attending the ford service training college at daventry on the bosch k jetronic fuel injection system. Continuous injection system found on european cars and volkswagen models assembled in the u. In engineering terms, the k jet has a very good mean time between failure, but a horrific mean time to repair.
The fuel system comprises a centrally mounted fuel tank, electricallyoperated fuel pump and bosch kjetronic or kejetronic continuous injection system. Primarypressure regulator, kjetronic bosch classic. Bosch k jetronic fuel injection service repair manual. This further deflects the control plunger in the fuel distributor and correspondingly supplies additional fuel. Bosch ke jetronic continuous injection system mechanical fuel injection overview part 1of 6 fuel injection system bosch cise 1986 fuel systems mercedesbenz cise electronic control system description the fuel injection system used on. This little goody is a common culprit in k jet or cis problems, along with pumps, oneway valves, accumulators and fuel distributors. The bosch l jetronic fuel injection system used in the porsche 912e is often referred to as the air flow controlled or afc fuel injection system. There is so much mystery surrounding the cis continuous injection system fuel system bosch has dubbed k jetronic, i wanted to try and make some sense of it for all porsche owners. I have been working in the motor trade for almost 10 years years now, and have been working with k jetronic for 8 of them. Bosch k jetronic fuel injection manual pdf document. 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. Today, it has been superseded by gasoline injection systems which thanks to.
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