Gasoline direct Injection. Related Books Free with a 30 day trial from Scribd. Related Audiobooks Free with a 30 day trial from Scribd. Wesley Edmond. Arjun Krishna. Amit Kumar Singh.
Elkarshofy Obeidi Elkarshofy. Angel Neyra , traficante at Latin-Rivals. September Za at Government. Show More. Views Total views. Actions Shares. No notes for slide. Electronic Fuel Injector 2. Fuel injection was in widespread commercial use in diesel engines by mid s. The direct injection was in employed in some notable designs like Benz, BMW. First gasoline injection system was developed by Bosch and introduced in in Mercedes Benz SL. Chrysler offered Electrojector on specific high performance models …the D, the D Arguably the first series cars equipped with an EFI system, but the early electronic components were not equal to the rigors of underhood service and were too slow.
Bosch called this LH-Jetronic system. These studies ultimately attributed a significant portion of air pollution to the automobile,. Continuous injection Central port injection Direct fuel injection The pump is typically located in or near the fuel tank. Like this presentation?
Why not share! Embed Size px. Start on. Show related SlideShares at end. WordPress Shortcode. Next SlideShares. Download Now Download to read offline and view in fullscreen. Download Now Download Download to read offline. Ayush Upadhyay Follow. Fuel Injection Systems. What to Upload to SlideShare. Related Books Free with a 30 day trial from Scribd. Dry: A Memoir Augusten Burroughs. Related Audiobooks Free with a 30 day trial from Scribd. Empath Up! Avijit Konar.
Suraj Shinde. Monil Patel. Sarvansh Mishra , Student at kccc at Student. Shubhesh Ranjan. Show More. Distributor system 2. Individual pump and nozzle system In-line 3. Common rail system 4. Unit injector system. Fuel pump after metering the required amount of fuel supplies it to a rotating distributor at the correct time for supply to each cylinder.
The number of injection strokes per cycle for the pump is equal to the number of cylinders. Since there is one metering element in each pump, a uniform distribution is automatically ensured. Individual Pump and Nozzle System — In this system, each cylinder is provided with one pump and one injector.
The plunger is fitted into the cylinder. Through ultra-precision machining, the clearance between the two portions is kept extremely small to ensure a tight seal even under high injection pressure and low speed conditions. The control pinion is fixed to the sleeve's upper edge. Thus, when the control rack moves side to side, this movement is transferred to the control pinion. This causes the control sleeve to rotate, then plunger also rotates at the same time.
When the top of the plunger reaches the upper edge of the feed port, it closes the feed port, pressurizing the fuel. However, the volume of fuel that is injected must be controlled according to the engine load.
This is accomplished by enabling the control rack to rotate the plunger, in order to vary the control groove position plunger's effective stroke , thus varying the volume of fuel. As indicated by the states of the plunger during rotation shown in below, the longer the effective stroke, the larger is the injection volume.
The valve slides vertically in the valve housing to perform the two functions described below. Reverse Flow Prevention Function If the plunger chamber and the nozzle are constantly open to each other, the time delay increases from the time the pump element starts delivering fuel until the nozzle starts injecting fuel, and affects the nozzle in shutting off the fuel injection when fuel delivery is shut off.
Retraction Function The valve moves further downward until the valve cone contacts the valve housing. The volume of the steel pipe increases in an amount that is equivalent to the downward movement of the valve. This causes the pressure in the steel pipe to decrease and improves the nozzle in shutting off the injection of fuel, thus preventing the nozzle from dripping fuel.
High pressure in the rail forces the fuel to each of the nozzles located in the cylinders. Each cylinder is provided with one of these unit injectors. The instant at which the solenoid valve is triggered is defines start of injection delivery. This action will cause the engine speed and injection rate to progressively fall until the engine stalls due to lack of fuel. This action will cause the engine speed and injection rate to progressively fall until the engine stops through lack of fuel. Without a governor, but with the throttle set, the load will either be heavy enough to cause the engine to lose speed or too light and the engine will gain speed.
Should the engine start to lose speed because of the load, it will continue to lose speed because of the injection pump characteristics. For the same reason if the engine speed increases due to lack of load, it will continue to increases. Engine speed never exceeds the maximum specified by the manufacturer, B.
Maintaining certain speed ranges, such as idle or speed range between low idle and high idle maximum speed is possible. Mechanical governor II.
Thus, point B moves to the right, and together with this movement, the guide lever fulcrum A also moves to the right. This movement is transmitted via the control lever to pull the control block towards the "fuel decrease" direction, Fig.
Inline injection pump governor thus decreasing the injection volume. The venturi is provided in the intake manifold of the engine. Therefore, a pneumatic governor system consists of a venturi and a governor. The atmospheric chamber is open to atmosphere or connected to the air cleaner housing, and the vacuum chamber is connected to the vacuum outlet port of the venturi.
The vacuum chamber contains the main spring, which pushes the control rack toward the "fuel increase" direction, via a diaphragm. For this reason, when the nozzle needs to be replaced, both the nozzle body and the needle must be replaced as a unit.
When this force becomes greater than the force of the pressure spring, the nozzle needle is pushed up by the fuel pressure and the needle separates from the nozzle body seat. This allows the nozzle to spray the fuel into the combustion chamber.
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