Bosch lejetronic fuel injection system volvo owners club. Bosch superseded the djetronic system with the kjetronic and l jetronic systems for 1974, though some cars such as the volvo 164 continued. It has adaptation memory of and malfunction lamp bosch motronic hardware car x file opel ecu bosch motronic free download as pdf file. L jetronic the l jetronic is an electronically controlled injection system with airflow metering based on the air vane principle and electromagnetically controlled fuel injection into the intake manifold. Gasoline fuel injection system ljetronic bosch pdf download. 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. Gasoline fuel injection system ljetronic bosch pdf. Aug 11, 2014 gasoline engine management gasoline fuel injection system k jetronic technical instruction. Rough engine idle, speed adjustment idle, and exhaust gas test. The average system pressure on all k jetronic fuel systems should be 520 kpa. Gasoline injection systems overview 10 k jetronic system overview fuel supply 14 fuel metering 18 adapting to operating conditions 24 supplementary functions 30 exhaustgas treatment 32 electrical circuitry 36 workshop testing techniques 38 k jetronic since its introduction, the k jetronic gasoline injection system has pro.
Gasoline injection systems gasolineinjection systems carburetors and gasolineinjection sys representative examples are the various tems are designed for a single purpose. This following overview is a brief description of the system. Robert bosch gmbh, 2000 postfach 30 02 20, d70442 stuttgart. Testing unit in the car, trying to start the car after rebuild. 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. Ljetronic fuel injection systems for bmw e12s first fives. This page was last edited on 30 novemberat sequential fuel injection and knock control. Many of them use a fuel pump essentially identical to the carbureted fuel systems.
The electronically modified bosch ke also has this capability although it never achieved the popularity of the pure mechanical system. Fuel delivery system certain mechanical fuel injection systems also utilize a mechanical fuel pump, typically some early gasoline fuel injection systems. Prior to ljetronic, mechanical fuel injection systems had proven that directly injecting atomized fuel into the cylinder resulted in better engine operation. Fuel injection systems after the gasoline travel all the way from the tank, passing all the equipment before, it is deliver to the equipment that is responsible from mixing the fuel whit the air, and supplying the fuel to the engine. Kjetronic is different from pulsed injection systems in that the fuel flows continuously. The following describes the process of converting your fuel injection system to the later style bosch ljetronic with lambda control. 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. 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. Automotive equipment business sector, department for automotive services, technical publications khpdi2. Diagnostics and spare parts from a single source product. The l jetronic aod ils variants are electro nically controlled fuelinjection systems solenoidopersle 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.
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. Bosch licensed the concept to many automobile manufacturers. The biggest problem will be the engine leaning out at high rpm. Bosch kjetronic fuel injection manual boschtech12d. Ljetronic fuel injection technical troubleshooting article. This page was last edited on 20 decemberat in rover fitted lucas electronic fuel injection, which was based on some l jetronic patents, to the sseries engine as used in the model. Ljetronic, lhjetronic, and motronicasanintegratedenginemanagement system. Bosch fuel injection system understanding djetronic fuel injection an overview of bosch djetronic in jaguar v12s 19751980 an overview. An electric wiring diagram is included at the end of the manual to assist you in tracing cables and. L jetronic, lhjetronic, and motronicasanintegratedenginemanagement system. Fuel injection system the ke2 jetronic fuel injection system is fitted to turbocharged engines. If you plan to supercharger or turbocharge your vehicle using the stock l jetronic fuel injection system i can assure you it can be done with minimal work and expense. Petrol engines can use gasoline direct injection, where the fuel is directly delivered into the combustion chamber, or indirect injection where the fuel is. Many of them use a fuel pump essentially identical to the carbureted fuel system s.
So, technically, the engine only needs a 19 lbhr fuel injector to support 300 hp, but this will require that the injector is at nearly a 100% duty cycle in. Since its introduction, the kjetronic gasolineinjection system has pro. The fuel injection system consists of an electric fuel pump, fuel pressure regulator, fuel damper, fuel injectors, cold start injector, electronic control unit ecu, and airflow meter. L jetronic electronic control unit ecu, airflow sensor, system relay, fuel pump relay, lambdasond oxygen sensor, vacuum switch, electric fuel pump, coolant temperature sensor, fuel injectors, and the electronic control unit terminal for the constant idle systems cis if equipped. Gasoline fuel injection system l jetronic bosch pdf download this manual may contain attachments and optional equipment that are not available in your. Singlepoint fuel injection singlepoint throttlebody injection tbi fuel injection is the concept behind this electronicallycontrolled injection system in which a centrally located solenoidoperated injection valve mounted upstream from the throttle. Relocating the plate in the fi afc unit by mark strand. L jetronic principle with electronic mapcontrolled ignition. Electronic luellnjectlon systems the l jetronic aod ils variants are electro nically controlled fuelinjection systems solenoidopersle system is described in t booklet l jetronic in iha bosch technical instruclion series.
Pdf gasoline engine management systems and components. The object here is to assemble a fi system that is properly tuned, provides good driveability, low fuel consumption, and has minimal emissions. 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. Chapter of d jetronic articles by drdjet describes systematic fault finding troubleshooting and repair on your bosch fuel injection system. Licensing some of boschs ljetronic concepts and technologies, lucas, hitachi. You should understand this fuel injection system before you begin working on the vehicle.
Bosch fuel injector repair manual free pdf file sharing. Download file pdf l jetronic workshop manual saab l jetronic workshop manual saab bosch kjetronic fuel distributor seal replacement video to show how i replaced the seals in my mk2 golf 16v kjet fuel distributor. The system pressure of the k jetronic can not be reduced like an efi system when cleaning with our lb2912f flow meter. The ljetronic is an electronically controlled injection system with airflow. The complete system contains the following components. Kjetronic since its introduction, the kjetronic gasoline injection system has proved itself in millions of vehicles.
Examples home mechanical fuel injection volvo owners club. All enginerelated changes are recorded by a variety of sensors and processed in the electronic control unit. The gasoline engine management system electronically controls combustion parameters amounts of air and fuel and ignition timing to increase engine output and reduce emissions and fuel. Ljetronic the bosch ljetronic also called afcair flow controlled fuel injection was put into usspec type 4s in the last model year 1974. Lambda probe aggregated to the injection system, installed in the exhaust pipe. Fuel injection problems poll compiled by steve blackham. Bosch k jetronic fuel injection manual pdf document. These early motronic systems integrated the spark timing element with thenexisting jetronic fuel injection technology. Bosch digifant engine management system jetronic motronic. 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. Nov 21, 2009 gasoline injection systems gasoline injection systems carburetors and gasoline injection sys representative examples are the various tems are designed for a single purpose. Combining this direct injection theory with electronic sensors, valves.
Gasoline fuelinjection system kjetronic utcis application guide a2 unwiredtools nbsp. Full text of autbks see other formats technical referencesrepairing a side mirror. Mercedes 116 and 107 chassis models were built with both bosch djetronic and cis kjetronic fuel injection systems during their production life bosch k jetronic fuel injection manual pdf document bosch k jetronic fuel injection manual 1. Pdf the gasoline engine management system electronically controls combustion. The lejetronic system is electronically commanded and injects the fuel in the intake manifold. Detach the operational relay set from the relay block as well as from the safety appliance located under the steering tube. Please consult your local distributor for those items you may require. The d jetronic system developed by bosch in the early 1960s was the first massproduction electronic fuel injection system. Thank you very much for purchasing thefi system ecu electronic control unit fiis a fuel injection system for sm all displacem ent m otorcycle, and this system is not a simplified but a full functional system, as well as it of large displacement motorcycle. It features a lambda probe aggregated to the injection system, installed in the exhaust pipe. The l jetronic aod ils variants are electro nically controlled fuelinjection systems solenoidopersle pdf free download ebook, handbook, textbook, user guide pdf files on the internet quickly and easily.
The bosch ljetronic fuel injection system used in the porsche 912e is often. Bosch ljetronic l jetronic rx7 brought to you by the team at created date. The injection has as function to provide the amount of fuel exactly. En bosch gasoline direct injection bosch gasoline direct injection as the key to clean and economical engines. The bosch technical instruction booklet vdt ubp 7511b explains the ljetronic system in detail andwill increaseyour understanding of this system this will reduce repair times and facilitate the use of this. Small amount of air bypasses the throttle so the engine. Gasoline fuel injection system ljetronic bosch pdf download ssp 253 direct petrol injection system with bosch motronic med7 pdf download case bosch fuel injection equipment for 267 case diesel engnes repair service manual pdf download. Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector. However, with the ljetronic system our cars use, about 90% of the complexity deals with about 5% of the running. It wont be as good as a modern fuel injection system like motec, but it will work.
See pages 286292 for important safety, emissions and warranty information. L jetronic, lh jetronic, and motronicasanintegratedenginemanagement system. It differentiates from the le jetronic for having, in addition to the injection system, also the ignition system incorporated in the command unit. Prior to l jetronic, mechanical fuel injection systems had proven that directly injecting atomized fuel into the cylinder resulted in better engine operation. The l jetronic was the first massproduced, fully electronic fuel injection system. 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. Feb 12, 2019 bosch digifant engine management system jetronic motronic. Ljetronic established the principle of calculating the fuel quantity required.
Originally, volkswagen adapted the l jetronic for the type 4 air cooled 411 engines sold in the united states due to more stringent emissions and fuel consumption regulations. Some have heating elements to start operating faster. Bosch developed an electronic fuel injection system, called djetronic d for druck, german for pressure, which was first used on the vw 1600tle in 1967. Product information automotive gasoline systems diagnostics and. It was primarily based on patents that bosch licensed from the bendix corporation. Some, however, use a vane type fuel pump mounted directly to the injection pumpfuel distributor assembly. Ljetronic system air mass measurement n fuel injection system has to know mass of air n airflow meter provides air mass flow information u mass is calculated by volume flow and density f need device to determine flow air flap on airflow meter f need temperature to determine density temperature sensor in air flow meter afm 1.
This manual may contain attachments and optional equipment that are not available in your area. Haynes diagram is good, but owners manual shows more. The afc fuel injection system also contains a feedback system which measures oxygen content of exhaust gases and maintains the airfuel ratio at about 14. Ljetronic system air mass measurement n fuel injection system has to know mass of air n airflow meter provides air mass flow information u mass is calculated by volume flow and density f need device to determine flow air flap on airflow meter f need temperature to determine density temperature sensor in air flow meter afm 1 throttle plate 2 air flow meter with. Bosch superseded the djetronic system with the kjetronic and ljetronic systems for 1974, though some cars such as the volvo 164 continued. Bosch mono motronic fuel injection manual gasoline fuel injection system mono jetronic motronic is the trade name given to a range of digital engine control units developed by robert bosch fuel injection. Sep 16, 2019 stop wasting time on youtube and get serious. Ljetronic electronic fuel injection only 530i 528i.
If in doubt, spray break cleaner on pipes, hoses, injectors, intake manifold and map sensor. The mechanical fuel injection system has recently been overshadowed by modern electronic injection, which enables the use of lambda closed loop control. Now let us have a look how bosch ke jetronic fuel injection system can be diagnosed and repaired on an example of audi 100 2. Fi electronic fuel injection system electronic control unit. Gasoline fuel injection system ljetronic bosch pdf download this manual may contain attachments and optional equipment that are not available in your area. Home automotive books gasoline fuelinjection system ljetronic.
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