It requires 01 drive, sod injects the luel continuously. Although gasoline fuel injection fi has been around just about as long as the automobile itself, it has always been a mysterious technology. Fuel injection systems diesel ruimanuelvieirapinto 1090039 sistemas automoveis anolectivo20092010 fuel injectionsystems diesel sistemas automoveis anolectivo20092010 1 basic diesel fuel systems 2 injection pumps 3 injectors 4 inline injection pump 5 radial rotary injection pump 6 electronic injection systems 7 bibliography. Mechanical fuel injection bosch kjetronic, bosch k jetronic fig. Bosch brings new energy to the powertrain this also applies to the constant further development of powertrain systems with gasoline port fuel injection. Today we provide technology for fuel supply, fuel injection, air management, ignition, engine control, and exhaustgas treatment as well as endtoend solutions for this drive system. Injector nozzle breakage and leakage problems were solved. These systems make the diesel engine at once quieter, more economical, more powerful, and lower in emissions. Mechanical fuel injection systems hilborn fuel injection.
A bosch fuel injection system which injects a steady stream of pressurized fuel into the intake manifold. 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. This paper describes advanced electronic fuel injection system for small 4stroke vehicles. Operation,diagnosis,and service 671 as a safety feature. Between the years 1973 and 1995, the highly reliable, mechanical multipoint injection system kjetronic was installed as original equipment in seriesproduction vehicles. Bosch injection valves as the leading fuel delivery developer, bosch has a range of gasoline injection valves made to the highest original equipment specifications. Motorcycle and modular applications hilborn fuel injection. Bosch mechanical gasoline fuel injection system pdf. There are several variations of the technology offering technological development and refinement. Today, it has been superseded by gasoline injection. A oneway check valve is also built into the pump outlet to prevent any fuel pressure in the lines or rail from bleeding back through the pump. Bosch has developed four individual approaches to improving gasoline port fuel injection.
Porsche 911 bosch mechanical fuel injection overview 911. With a long history of diesel fuel injection expertise and innovation, bosch engineers manufacture glow plugs. Gasoline direct injection key technology for greater. Mechanical gasoline fuelinjection system with lambda closed.
Robert bosch is exempt from liability, and reserves. They are critical to the performance of a modern engine management system and accuracy is vital for the effective running of the modern engine. They are the fuel injectors used to inject or spray gasoline directly or through intake manifold into the combustion chamber for further combustion by spark. How gasoline direct injection works bosch media service. Bosch has developed four individual approaches to improving gasoline portfuel injection.
It comprises nozzle holder assemblies with injection pressures up to 1,800 bar and mechanically controlled single pumps which are powered by the camshaft for the engines valve controller and are therefore referred to as pumps with external drive pf. Until about 1970 it was both rare and expensive, restricted to some aircraft applications. In 2012, roughly 60 percent of all newly manufactured vehicles. Fuel filter the fuel filter is a very important service item. In the 1950s this type of fuelinjection sys tem working with direct fuel injection also. Vw ljetronic fuel injection workshop manual author. From there it passes into the fuel distributor, which sends a burst of fuel to each injector, from where it is fired into the inlet port. All bosch fuel injectors released to the aftermarket are oe fit, form and function, and are produced to oe specifications.
From rennsport visit for more great performance information bosch mechanical fuel injection is a splendid, if not inexpensive, performance induction system. Bosch mechanical gasoline fuelinjection system with lambda closedloop control kjetronic isbn 1852260300. 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 consumption regulations. Hilborn fuel injection has been a leader in the design and implementation of mechanical fuel injection for over 65 years. If you have a full membership, then please login on the forums first, and then use the technical manual button to return to the manual.
For a much larger clearer image of the parts breakdown diagram click here bosch mechanical fuel injection pump assembly section. It was used on the 911s and 911e from 69 to 73 as well as the 73 carrera rs. While early porsche 911s used carburettors to regulate the airfuel mixture, changing emissions regulations at the end of the 1960s and the quest for greater power soon saw zuffenhausen turn to mechanical fuel injection on its iconic rearengined sports car. Bosch licensed the concept to many automobile manufacturers. 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. The main difference between carburetor and fuel injection. This was a speeddensity system, using engine speed and intake manifold air density to calculate air mass flow rate and thus fuel requirements. Gasoline port fuel injection bosch mobility solutions. 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. 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. Presently gasoline injection system is coming into vogue. Gasoline injection valves bosch automotive aftermarket. Fuel injection systems have a significant influence on the combustion process and hence a key role to play in improving engine fuel consumption and reducing noxious exhaust emissions. Covers all the bosch basic systems, porsche nonspecific.
The preheat, starting and postglow phases of a glow plugs operation affect not only the startup function, but the vehicles overall performance as well. Kejetronic a gasoline injection system must inject. Bosch mechanical gasoline fuel injection system pdf download. Gasoline direct injection key technology for greater efficiency and. The commonrail system with piezo injectors by bosch enables the flexible injection of fuel at pressures up to 2,700 bar. Sep 25, 2018 diesel fuel injectors required higher injection pumping than gasoline injectors as diesel is heavier than gasoline. The singlecylinder pump system has been a proven injection system for many years. Bosch mechanical fuel injector mfi tester and cleaning. The injection pump is an inline, plunger type, with an individual plunger and barrel pumping element for each engine cylinder. Originally, volkswagen adapted the ljetronic for the type 4 air cooled 411 engines sold in the united states due to more.
Pfi port fuel injection bosch port fuel injectors pfi have a robust design and are capable of using ethanol fuel e100. It is a converted diesel timed fuel injection pump coupled with port injection. Bosch mechanical fuel injection is a splendid, if not inexpensive, performance induction system. Electronically controlled mechanical fuel injection. In the 1950s this type of fuel injection sys tem working with direct fuel injection also.
Bosch port fuel injectors pfi have a robust design and are capable of using ethanol fuel e100. Electronic fuel injection 92 mechanical fuel injection 152 components 106 mechanical injector manifolds 46 blown engines 6 buick 1 chevrolet 409 1 chevrolet big block 2 chevrolet racesaver 3 chevrolet small block 8 chrysler 4 desoto 1 ford 8 motorcycle and modular applications 1 offerhauser 1 single throat. The following table is a guide to the fuel paths marked by each blue arrow in figure 6. This costeffective systems approach can reduce fuel consumption by as much. The system is based on the kjetronic mechanical system, with the addition of an electrohydraulic actuator, essentially a fuel injector inline with the fuel return. Oct 07, 2015 diesel fuel behaves differently from gasoline, but like most euro injection pumps, spica resembles a diesel unit. An overview fields of application 4 technical requirements 4 injectionpump designs 6 mechanicallycontrolled governed axialpiston distributor fuelinjection pumps ve fuelinjection systems 8 fuelinjection techniques 9 fuel supply and delivery 12 mechanical enginespeed control governing 22 injection timing 29. Gasoline injection systems port fuel injection systems.
The engine control unit ecu may be either analog or digital, and the system may or may not have closedloop lambda control. Nov 15, 20 bosch gasoline direct injection as the key to clean and economical engines. Some, however, use a vane type fuel pump mounted directly to the injection pumpfuel distributor assembly. Pdf electronic fuel injection system electronic fuel. Bosch launched gasoline direct injection in 1951 and has remained at the cutting edge of the technology ever since. If mixture formation is homogeneous, the hdev5 highpressure injection valve makes a major contribution to optimum, and thus fuel efficient, combustion. This system consists of the unit injectors, fuel manifolds, electronic pressure regulator, high pressure fuel pump, electronic control unit, wiring harness, and engine sensors. The robert bosch model pes 6mw injection pump is used on the international dt466c diesel engine. The triedandtested technology still features a high potential for the further reduction of fuel consumption and emissions and will keep to play an important role also in the future as. Injection pressures during the whole process should be above 1200 bar for a good spray formation and airfuel.
Access to restricted sections requires a full membership of the pagoda sl group. All the old model vehicle were equipped with carburetor for air fuel mixing and now im going to explain you electronic fuel injection system that has been. A servojet electronic fuel injection system was designed and manufactured for the cummins vta903 engine. Pdf gasoline engine management systems and components. The injection pump assembly incorporates mechanical. With a long history of diesel fuel injection expertise and innovation, bosch engineers manufacture glow plugs to withstand the rigorous demands of todays diesel engines. This tester will also work with older porsche and other european cars that used the bosch mechanical fuel injection system from the 1960s.
The following characteristics of an injection system are desirable in achieving these goals. Many of them use a fuel pump essentially identical to the carbureted fuel systems. 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. Fuel injection system an overview sciencedirect topics. Classification of injection systems a fuel injection syystem is required to inject and atomize fuel in to the cylinder of ci engines. For producing the required pressure for atomizing the fuel either air or a mechanical means is used.
Until about 1970 it was both rare and expensive, restricted to some aircraft applications, and to a handfull of exotic, high performance cars and racers. Vw ljetronic fuel injection workshop manual created date. Fuel injection system presented by raghvendra kumar pandey 10me123 national institute od technology, durgapur 10nov 1 2. Bosch launched gasoline direct injection in 1951 and has remained at the cutting edge of. Some, however, use a vane type fuel pump mounted directly to the injection pump fuel distributor assembly. Already in the 1950s, the mechanical fuel injection. Bosch mechanical fuel injector mfi tester and cleaning kit. Chevrolet introduced a mechanical fuel injection system, made. Advanced diesel electronic fuel injection and turbocharging.
The pump is beltdriven from the crankshaft at half engine speed. With port and direct gasoline injection, bosch combines gasoline direct injection with gasoline port fuel injection. Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector all diesel engines use fuel injection by design. Bosch gasoline systems bosch provides worlds best gasoline systems with latest innovative technologies and characteristic. Bosch offers a complete system comprising a highpressure pump, highpressure rail with injection valve, a large number of sensors, and an engine control unit. Porsche used various types of mfi on factory racing cars from 67 to 84. Our staff has over 75 combined years of mechanical injection experience, ranging from a basic 1 cylinder application to turbo charged v12 monsters, so we can design the ideal system for your racing application. The bosch fuel injector has a return rate of 1 part per million ppm, making bosch the industry benchmark. Many of them use a fuel pump essentially identical to the carbureted fuel system s. This kit will work on the fuel injectors from the 6. Kjetronic is a mechanical injection fuel injection system in. Crossreferencing oe bosch to bx bosch catalog electric motors 202014 catalog hydraulics 20142015 catalog motorvehicle sensors for lcv and trucks 20102011 catalog diesel fuel injection 201220 catalog fuel supply and control 20172018 catalog bosch diesel injection technology for commercial vehicles 20102011. Mechanical diesel injection components for large engines.
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