Electronic control of a diesel engine allows fuelinjection parameters to be varied precisely for different conditions. This system consists of the unit injectors, fuel manifolds, electronic pressure regulator, high pressure fuel pump, electronic control unit, wiring harness, and engine sensors. Advanced diesel electronic fuel injection and turbocharging. How direct fuel injection systems work explained in 5 minutes. Each component in our efi kit is selected specifically for your application to deliver the results you are seeking. The diesel fuel injection system has undergone many changes over the years. Requirements of a diesel injection system the functional requirements of an injection system are listed below. Bypass circuit is a circuit, usually temporary, used. Pdf development of an electronic fuel injection system.
Take a technological leap forward with a new electronic fuel injection system from summit racing. New direct fuel injection engine control systems for. In a unit injector, the device is usually lubricated and cooled by the fuel itself. The speed of a diesel engine is controlled by the amount of fuel injected into the cylinders. A unit injector ui is a high pressure integrated direct fuel injection system for diesel engines, combining the injector nozzle and the injection pump in a single component. An electronic fuel injection system for a 4stroke, 16 cylinders, v configuratio n, medium speed, large bore locomotive diesel engine has been developed an d successfully retrofitted o n a. How a common rail diesel injector works and common failure. The injectors spray fuel into the engines intake valves through the intake port. Fuel filter the fuel filter is a very important service item.
This is the only means by which a modern diesel engine is able to satisfy the many demands placed upon it. Gas engine fuel systems are lower pressure, diesel engine fuel systems are high pressure diesel high pressure common rail hpcr system has an extra pump high pressure pump not found on most gas systems security classification 4. An electronic control unit helps to process the data from various sensors to optimize the fuel mixture principle of efi efi is an indirect, pressurized injection system with injectors operated by a solenoid. We, at engineered diesel, created this video to help our customers have a better understanding of how a common rail diesel injector works, which makes it easier to understand why they fail. The point or location of fuel injection is one way to classify a gasoline injection system. Fuel is sprayed into the top center of the intake manifold. With the increases in demands of precision of air fuel ratio control, electronic fuel injection is resorted to. The acceptably flexible and theoretically exact choice of injection begin and injection duration due to. Operation,diagnosis,and service 671 as a safety feature. In the program, the injection pump was replaced with the measured pressure at the junction between the pump and highpressure pipe. Bosch edc 16 is a torqueorientated engine management system which is featured for the first time in a diesel engine. Common rail electronic injection systems how diesel engines differ from gas engines contd.
New direct fuel injection engine control systems for meeting future fuel economy requirements and emission standards 194 variable valve system expanded phase and lift control nonthrottle use of freedom in injection control use of high power supercharging system fuel consumption co2 and emissions standards use of torque control by means of. Product marketing product training diesel injection systems. Some industrial diesel engines use multipoint fuel injection mpi similar to that used in most cars. Efielectronic fuel injection systems at summit racing. In a gasoline engine, the speed of the engine is controlled by the amount of air admitted into the carburetor or gasoline fuel injection systems. The repeatability of the fuel injection is what makes diesels so economical, and why their speed governing is so good in relation to fuel volume regulated petrol engines. Electronic fuel injection systems for heavyduty engines. As is the case with petrol engines, in the edc 16 system all torque demands are collected, evaluated and coordinated in the engine control unit. The unit injection system integrates the injection pump and nozzle into a single module.
As a holley certified dealer, hilborn fuel injection has the ability to. Electronic fuel injection systems hilborn fuel injection. Although many people consider diesels to be little more than agrarian chuggers, the fact that theyre often used in industrial settings for hours on end means that cost and public sentiment take a backseat to efficiency, durability and economy. The bosch continuous injection system cis is a hydraulictype fuel injection system which uses an air flow sensor, that is mechanically connected to a hydraulic valve, to control injection quantity. 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. The structure and properties of diesel fuel injection system directly influence the performance of diesel, and calculation and analysis are important methods to improve engine performance. Diesel fuel injection system, component layout caution. Diesels were some of the first engines to receive fuel injection. The control of engine emissions is an important global issue for on and offroad vehicles. Types of diesel fuel injection systems it still runs. Highpressure commonrail fuel injection system with. Previously, cars used to have a carburetor installed in them, but such cars are no longer on the market. Mpi systems utilize a single or dual fuel pumps to feed fuel injectors mounted in the intake port of the engine. Explore electronic fuel injection with free download of seminar report and ppt in pdf and doc format.
The fuel tank contains a fuel gauge sending unit, a filler tube and a fuel pump. Electronic fuel injection seminar report, ppt, pdf for. Recently, advancements in electronics and measurement technology have led to a substantial improvement of the fuel injection control, both in. Introduction of the fuel into the combustion chamber should take place within a precisely defined period of the cycle. Check out injection system basics as we take a closer look at what makes your diesel tick. In this method, the buildup of inject pressure and the process of injection will be totally separated.
A new electronically controlled fuel system is proposed for direct injection of natural gas in diesel engine. U9 diesel fuel injection systems for compression ignition. Checking fuel system for leaks page 236 diesel injection pump, general information page 2312 diesel injection pump static timing, checking and adjusting page 2314 max. High pressure injection delivers power and fuel consumption benefits over. It shows high injection pressures independent of the engine speed with acceptable fuel atomization also at the beginning and the end of each injection due to a relatively constant rail pressure.
Also explore the seminar topics paper on electronic fuel injection with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year mechanical engineering me or production automobile students for the year 2019 2020. Electronic injection system for natural gas in a diesel enginedevelopment and testing 890852. A servojet electronic fuel injection system was designed and manufactured for the cummins vta903 engine. Basic diesel engine operation diesel engine force air by the intake valve into the cylinder high compression ratio heats the air enough to ignite the fuel fuel is injected into the cylinder at high pressure the amount of fuel injected suits to the load and controls engine speed.
So, by analyzing the structure, math models and working process theory of the electronic control ppvi fuel injection system, this paper founds initial and improved simulation models of the diesel electronic. Today efi system is universally employed to achieve the desired objective. M1 compare the relative advantages and disadvantages of a conventional fuel injection system with a high pressure common rail system m2 compare two governor types used on modern automotive diesel engines in terms of their modes of operation and levels of sensitivity m3 evaluate and compare the diagnostic tests and repair strategies that can be. The system is composed by the fuel tank, the pipes, one or more fuel filters, a fuel pump that could be mechanical or electric and the fuel metering components such as the carburetor or fuel injection system.
Fuel injection systems are nothing new and have been around since the 1950s first being developed for aircraft which had problems using carburetors in flight maneuvers. Electronic fuel injection diagnosis and repair active codes are codes describing a condition that is currently present to alert the driver or service technician of abnormal parameters. A number of heavyduty diesel engine manufacturers have developed their own electronic fuel injection systems. The plunger pump used is usually driven by a shared camshaft. Mechanically, the diesel engine is similar to the gasoline engine. The system consists of a carb spacer plate with a fuel block and injector, an ecu, and a wide band o2 sensor. This constant strokevariable volume system was the basis for the original successful bosch pump, and forms the basis for probably 99% of injection systems. It is difficult to optimize power andor torque across a wide range of engine speeds with carburetors, whereas efi systems are capable of optimizing airfuel ratios and ignition timing over the whole range of operating speeds while at the same time compensating for other. Advanced diesel common rail injection system for future. We carry many efi systemsmany selftuning and selflearningfrom the top players in engine performance, including msd ignition, edelbrock, holley, fast, accel, chevrolet performance, quick fuel, and more. Gas engines can use gasoline direct injection, where the fuel is directly delivered into the combustion chamber, or indirect injection where the fuel is mixed with air before the intake stroke. Efi equipped engines generally provide higher power and torque than a carbureted version of the same engine. Common rail electronic injection systems diesel driveability.
All information, illustrations and specifications contained in this manual are based on the latest product. 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. Common rail systems by liebherr system integration intelligent system integration is the link between mechanical, hydraulic and electronic components. An electronically controlled fuel injection system for new. Bosch common rail diesel fuel injection system the evolution of the diesel injection systems from the old mechanicallycontrolled pumplinenozzle designs to the modern electronicallycontrolled unit injector and common rail designs has been driven by the need of achieving tighter control of injection parameters and lower emissions. See the bosch, siemens, and stanadyne pumps that make. Hilborn fuel injection offers a wide range of ir manifolds and blown efi systems for street rodding to full race competition. Crs 4 hydraulically amplified diesel injection system functions orail pressure up to 50 bar ohad injector with hydraulic pressure amplification osophisticated closed loop fuel metering control oinnovative, delivery controlled high pressure pump platform advantages. The benefits of electronic fuel injection efi power4flight.
In a multipoint injection system, each intake manifold has an injector. The lambda system is a feedback control capable of measuring airfuel ratios and. Highpressure commonrail hpcr injection system is a new method of oil supply for diesel engine, it is a closeloop system that contained with high pressure oil pump, pressure sensor and electronic control unit ecu. Actuator is a device that performs work in response to an electronic signal. Direct injection system, whereas the 4stroke system is a pi port injection system. The fuel injection control system dramatically affects the fuel efficiency and the emissions of diesel engines in agricultural vehicles 1,2. Electronic injection system for natural gas in a diesel. A singlepoint injection system, also call throttle body injection tbi, has the injector nozzles in a throttle body assembly on top of the engine. It consists of the solenoid controlled injectors interfaced with a metering valve under stepper motor control. There are two kinds of injection systems both deliver gasoline and diesel fuels, mechanical and. On the other hand, the fuel injection system has been around since the 1950s and electronic fuel injection efi was installed in european cars during the 1980s. The heui uses engine lubrication oil that is pressurized from 870 psi 6 mpa. The injection system is optimised for different emissions standards, low consumption or the highest engine performance.