Automotive equipment business sector, department for automotive services, technical publications khpdi2. My 85 qv may 85 has the late kjetronic with ecu, metering valve and damper, and throttle microswitch, cclip injector bungs. The fuel distribu tor allocates this fuel to the injection the kjetronic is a mechanically and valves of the individual cylinders. These fuel injection systems were considered to be really reliable and trustworthy. Ljetronic system throttle and idle control n throttle opens to allow more air to sucked in to engine n small amount of air bypasses the throttle so the engine gets air and will idle. Robert bosch gmbh, 2000 postfach 30 02 20, d70442 stuttgart. If that is the case, your ecu is okay and you should check fuel pump relais, cabling and the fuel pump itself. Kjetronic system overview the kjetronic 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. Approximately up until 1994 mechanical fuel injection systems have been installed on certain mercedes, audi, volkswagen, ford etc. Bosch cis fuel injected engine cold and hot start problems. 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. Bosch kjetronic and kejetronic mechanical fuel injection systems.
Commonly called continuous injection system cis in the usa. 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. Fuel management mixturecontrol unit airflow sensor. I am getting the specs from the haynes volvo 240 series service manual and volvo fuel injection. For the full background, youre going to need the bosch fuel injection and engine management manual. Golf mk1 volkswagen workshop manuals power unit k jetronic ignition system mixture preparation system, mechanical injection k jetronic injection system removing and installing control plunger engine code. The following table is a guide to the fuel paths marked by each blue arrow in figure 6.
Gasolineengine management gasoline fuel injection system kjetronic technical instruction published by. As with our fuel distributors, kmi service exchanged k jetronic warm up regulators are fully remanufactured and calibrated to manufacturers original specification on our purpose built test and calibration bench. By the way, only two companies, bosch and lucas, have developed almost all of the various fuel injection systems. Nov 21, 2009 the fuel distribu tor allocates this fuel to the injection the k jetronic is a mechanically and valves of the individual cylinders. Download mercedes benz bosch k jetronic manual book pdf free download link or read online here in pdf.
Mechanical fuel injection bosch k jetronic, bosch k jetronic fig. Gasoline engine management gasoline fuel injection system k jetronic technical instruction published by robert bosch gmbh, 2000 postfach 300220, d 70442 stuttgart. Troubleshooting symptoms kjetronic is a mechanical system. 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 system replaces the electronic system of earlier years. The bosch d jetronic is an electronical gasoline injection system which was introduced in 1967. Scribd is the worlds largest social reading and publishing site. Vw ljetronic fuel injection workshop manual author. 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 kjetronic fuel injection.
This synthesis, comprising the mechanical basic functions coupled with electronic adap tation and opti mization functions, is the kejetronic. In our experience, weve found that a slightly richer idle co provides the best idle and the best starting. Bosch l jetronic fuel injection troubleshooting, maintenance. 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. Vw ljetronic fuel injection workshop manual pdf yumpu. This site is like a library, you could find million book here by using search box in the header. It must be stressed that the implementation of this system by volvo on many of its cars, involves some modifications, according. Gasoline fuel injection system kjetronic gasolineengine management technical instruction published by. Between the years 1973 and 1995, the highly reliable, mechanical multipoint injection system k jetronic was installed as original equipment in seriesproduction vehicles. 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. The engines fuel requirements air fuel ratio excessair factor fuel management systems electronically controlled systems mechanical systems k jetronic fuel supply outline of system electric fuel pump fuel accumulator fuel filter primarypressure regulator fuel injection valve. How to tune and modify bosch fuel injection motorbooks workshop watson, b on.
This article covers kjetronic injection for e21 models, also injected e12 and early e28 5er. The technical instruction bookletfuel injection continuous injection system cisat the back of the manual describes the components and operation of the kjetronic fuel injection system in detail. This manual will describe the kjetronics function and its particular features. If the engine has a cold start injector it should be. Thats the explanation of fuel injection theory in a nutshell.
The warmup regulator, also called the control pressure regulator, lowers the control pressure of the kjetronic when the engine is cold. Cables on fuel pump can corrode or fuel pump can be worn. Read online mercedes benz bosch k jetronic manual book pdf free download link book now. A thorough understanding of the various components is required before working on kjetronic fuel systems.
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. Anyhow here is the link bosch kjetronic fuel injection manual. 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. Factory specification for base co is a duty cycle of 54%65% translated to a dwell reading of 4959 degrees. 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.
Since this point, the kjetronic has now become particularly important with regard to maintenance and repair. Bosch kjetronic overview mercedesbenz forum benzworld. Robert bosch gmbh, 2000 postfach 3002 20, d70442 stuttgart. K jetronic flooding even with correct fuel pressures 200 1979. The bosch ljetronic fuel injection system used in the porsche 912e is often referred to as the air flow controlled or afc fuel injection system. This further deflects the control plunger in the fuel distributor and correspondingly supplies additional fuel.
Kjetronic is the term used by bosch to describe a fuel injection system which features. 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. Gasoline fuel injection system ljetronic bosch pdf download this manual may contain attachments and optional equipment that are not available in your area. R02cr e b colqegu couivo\ aglase we guq ph ph ecn le logq coucvtloue eae16uj sqgble 10 cugua vqsblsqou ob6lguua couqguoue guq nuq6l bgl11cr1gl logq.
Other than on k jetronic, fuel pump relais normally is not a common source of failure. Rwd kjetronic flooding even with correct fuel pressures. Do not confuse the electric fuel pump with the injection pump. Please consult your local distributor for those items you may require. Bosch ke jetronic manual bosch k jetronic manual mercedes bosch kjetronic service manual bosch ke jetronic workshop manual bosch d jetronic fuel injection manual manual kjetronic kjetronic l jetronic le jetronic kjetronic deutsch kjetronic german bosch manual bosch manual she bosch fsa 740 using manual bosch gourmet 872 manual. The engines fuel requirements a sparkignition engine needs a particular air fuel ratio in order to operate. Today, it has been superseded by gasoline injection systems which thanks to. Heres a link to the mercedes source video about cleaning ciskjet injectors. 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 electric fuel pump is located underneath the rear floor panel. The bosch ke jetronic fuel injection system is fitted to escort rs turbo models and is a further development of the k jetronic system.
Bosch ke3 jetronic 539 89 injection system manual 328 mondial to read online or download as pdf. The fuel return line was also eliminated and a check ball installed in its place. Gasoline fuelinjection system kjetronic technical instruction. Pump element and control rack, bosch p pump piston a. With engine load and rmp increased, injector open times increase with airflow. Certain operating conditions make it necessary to correct the mixture accordingly. How to tune and modify bosch fuel injection motorbooks. Mechanical fuel injection bosch kjetronic, bosch k jetronic fig. Vw l jetronic fuel injection workshop manual author. Add to this the sheer weight of the 116s and their leisurely autos. All mercedesbenz fuel injected engines are equipped with electric fuel pumps. The main difference between the two types is that on the.
Bosch kjetronic continuous injection system mechanical fuel injection overview 15. Gasoline fuel injection system ljetronic bosch pdf. The kjetronic system was installed as original equipment in series production vehicles in the years 1973 through 1995. The bosch k jetronic, or continuous injection system cis, is a mechanicallybased fuel injection system that was used on the 911, 911 turbo, 924, 924 turbo, and 928 models during the 1970s and into the early 1990s. These are found on cars with the bosch cis fuel injection. It is the manual, including specs, and tuning information. Vw ljetronic fuel injection workshop manual created date. Since their introduction, jetronic fuel injection systems have proved. Gasoline engine management gasoline fuel injection system k jetronic technical instruction published by robert bosch gmbh, 2000 postfach 300220, d. E21 3er 323i models are equipped with the bosch kjetronic system, whereas e30 3er 320i and 325i models are fitted with the bosch ljetronic system. Ljetronic the bosch ljetronic also called afcair flow controlled fuel injection was put into usspec type 4s in the last model year 1974.
Bosch k jetronic fuel injection manual pdf document. Jetronic fuel injection service repair mercedes benz bosch k. Kjetronic fuel injection system kjetronic is a mechanically and hydraulically operated fuel injection pump, introduced by bosch gmbh in the year 1973. All books are in clear copy here, and all files are secure so dont worry about it. Technical data sheets bosch k jetronic fuel injection.
Fuel injection ceases when this helix edge passes the spill port in the pump cylinder. I have been working in the motor trade for almost 10 years years now, and have been working with kjetronic for 8 of them. Cis kjetronic fuel injection tester with quick couplers. Troubleshooting guide for kjetronic fuel injection. The kjetronic 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. Robert bosch model pes 6 mw fuel injection pump service manual form cges375 september, 1984 printed in united states of america.
Bosch kjetronic fuel injection part 1 volvo owners club. Bosch k jetronic fuel distributor quick look youtube. The longer injectors are open, the more fuel injected. Dec 25, 2014 chapter 5 of d jetronic article series by drdjet describes the electrically operated injection valve. Originally, volkswagen adapted the ljetronic for the type 4 air cooled 411 engines sold in the united states due to more stringent emissions and fuel. Bosch kjetronic fuel injection manual boschtech12d. This has probably already been shared, but i thought it was a cool find. Golf mk1 volkswagen workshop manuals power unit k jetronic ignition system mixture preparation system, mechanical injection k jetronic injection system checkingadjusting rest position and free travel of air glow meter plate engine code. 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. With ci fuel injection, the lower the duty cycle or dwell, the richer the idle fuel mixture. Bosch k jetronic mechanical fuel injection troubleshooter. How to tune and modify bosch fuel injection motorbooks workshop. Vw l jetronic fuel injection workshop manual created date. Bosch k jetronic fuel workshop service repair manual.
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