Fuel Injection System: Comparing How TBI, PFI or MPFI, GDI, Dual Injection Works?
Comparing How Different Fuel Injection Systems Work? PFI, GDI & Dual Injection
Types of fuel injection systems:
A fuel injection system is a vital component in a car's engine that delivers fuel to the combustion chamber. It is responsible for providing the right fuel to the engine at the right time to ensure efficient, accurate, and reliable operation, making it the preferred system in modern vehicles.
Single-Point or Throttle-Body Injection:
Single-point injection, or throttle body injection, uses a single injector in the throttle body to deliver fuel to all cylinders. The fuel is injected into the throttle body and mixed with air as it passes through the intake manifold and into the cylinders. It was commonly used in older vehicles and is now less common due to its limited precision and efficiency.
Port or Multipoint Fuel Injection:
Port or Multipoint Fuel Injection is also known as an indirect Injection system. In the port injection system, the fuel is injected into the intake port, rather than directly into the engine cylinder.
In a port fuel injection system, each cylinder has a fuel injector located in the intake port of the engine, which sprays fuel into the intake manifold just before the intake valve opens. The fuel mixes with the incoming air and is drawn into the cylinder when the intake valve opens.
Direct Injection:
In a Direct Injection system, fuel is injected directly into the combustion chamber of each engine cylinder, rather than into the intake valve, so that it looks like a diesel engine, where the injector will spray fuel directly into the cylinder. Direct injection is used in both petrol and diesel engines.
Typically, the fuel is injected during the compression stroke of the engine. This allows for better control over the fuel and air mixture and can result in improved engine efficiency and performance.
Dual Injection system:
Dual-injection systems use two different methods of injecting fuel into the engine: direct injection and port injection. It is commonly found in modern gasoline engines and is designed to Improve Engine Efficiency.
In a dual injection system, there are typically two types of injectors: a high-pressure direct injector and a low-pressure port injector. The direct injector injects fuel directly into the combustion chamber, while the port injector injects fuel into the intake port of the engine.
--- Time Stamp --
00:00 - Introduction
00:48 - Parts & Working of Fuel Injection
03:03 - Air-Fuel Ratio
04:31 - Carburator vs. Fuel Injector
07:09 - Throttle Body Injection (TBI)
08:33 - Port / Multipoint Fuel Injection (MPFI)
13:55 - Direct Injection System
18:39 - Dual Injection System
#fuelinjection #gdi
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Disclaimer:
This video is just for educational purposes only. We are not in the auto repair business nor publish automotive service manuals. This video is not reviewed or authorized by any vehicle manufacturer. This video is intended only as general guidance. Every system is slightly different, so refer to the owner’s manual of your vehicle for any specific information about your model. Remember that only proper service and repair procedures will ensure your car's safe and reliable operation.
Copyright Disclaimer:
Copyright Disclaimer under section 107 of the Copyright Act 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational, or personal use tips the balance in favor of fair use.
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Looking at GDI all i hear is some old mechanic saying "Endless money pit"
Carbon buildup on the valves
Hahaha. It's true because it is a flaw but some makers still use it without port injectors.
Not so if venting to atmosphere was permitted. Rolling non-smoke!
So far the best fuel injection explanation I have found thank you !!
American guy pronouncing it al-yu-min-ee-um. I dig it!
Beautiful explanation! thanks!
howzit! 0:12 I was really surprised to see the Russian carburetor PeCar K-151 because in my early days, I fixed them a lot. Thanks a bunch!
Sir Thanks For Information About Different Types Of Fuel Injection System 😊👍Thankyou Verymuch
6:56 actually, before I engine-swapped for a bigger engine, my 1984 Camaro had a carburetor that acted like fuel injection, but also acted like a carburetor at the same time. It had parts inside of it that regulated fuel-air mixture controlled by the ECM.
Ah, that was a crazy system
Forgot to add, crossfire injection
First comment from me. This video was most available to me. Good job. Thank you...
Most welcome 😊
😅
For me MPFI is the best system .
Great explanation. Thanks.
could you do a video covering various tunes? what tuning actually is? octane tunes? thanks!
Thanks for giving good knowledge of injection system of vehicle please make video on fiat quadra jet engine injection system.
well explained thank you.
Wow, I learned something on this. I never knew about the guided injection design. I feel kind dumb not knowing that after all this time.
Thank You so Much
Thanks from France 👏
Welcome!
Well done
Good information
Good explanation video of fuel injector.
Thank you!
Nice knowledge delivered
Good job 👏
Nice video for learning...
Very helpful vdo
This video is very good Brother
Back in the 80s European cars had Fuel Injection E-CIS Called K-Jetronic or CIS or Constant injection System, it wasn't a Sequential system, outdated by 1985 Where Some Top Line American and top line Japanese Cars used a Timed Sequential Port Fuel Injection System
Excellent vedio
Knowledgeable presentation. Thanks for preparing this good piece of knowledge
Good job
Thank you so much ... I have a gdi injection engine ( vw fsi) . I have converter it to start using cng gas but yhe car has refused running on gas. I ensured the gas inlets are very close to the engine block and yet I will not run on gas. Please guild me on what to do
At 15:27 - Petrol/gas fuel burns with a flame front, it does not explode. Diesel, on the other hand does explode, these engines are referred to as detonation engines.
compresion ignition in the usa
_"Diesel, on the other hand does explode"_ Maybe under water yes, but not in real life
Out of these types of injectors..which one is widely using now days in SI engine and CI engine??
Nice
Does the system have a fuel return line to the tank? in Dual Injection System
GDI is preferred by car manufacturers as part of planned obsolescence...unless you periodically maintain your vehicle--but that adds to greater co$t as well for parts and labor.
most moved to dual injection now
Goodjob👍👍👍
Can do one video for CA smog repair like how work co and
As said too many components,parts & their requirements,got a solution as follow:- 1)Either one or not more than two pistons engine. 2)Power problems can be achieved by making a choice for the size of the piston. 3) Position of engine fitment in car to get body balance ratio for getting the best performance from engine. 4)Research which type gives three qualities,reliability, performance & fuel consumption to the standard.
Do you have a video that explains how the old mechanical fuel injectors in diesel engines work?
Old mechanical diesel injectors work in a similar manner, instead of a electromagnetic coil, you had a camshaft press the injector, spraying fuel, more like a bottle of glass cleaner, you pull the trigger, a fine mist of it comes out.
@Keyaan Adeeb The old Detroit Diesel injection system worked like this. Then came the rail pump and then the Bosch VE pump designed for high-speed diesel engines.
Good 👍
Wouldn't simultaneous fuel injection be worse for fuel economy and emissions than sequential and batch because you're getting fuel delivery on strokes that aren't the intake stroke?
The batch injection would have the same problem. Only one cylinder is doing an intake stroke. Why would anyone inject fuel into more than one port at a time since the wiring and electronic control is not difficult?
Because that's what the huge gas corporations want everyone to think. More gas purcha$e from them..
I am assuming it changes torque or hp depending on cc of the cilinder and sequence. Maybe batch would improve torque, while sequential focuses on horse power , ?
What do you mean by simultaneous? The dual injection system operates at different rpms.
There's hardly an engine that works solely on simultaneous injection through all rpm. I have a car with Nissan engine QG18DE. It starts with simultaneous injection when the engine is cold, for about 20 seconds, and switches to sequential injection when engine rpm is above idling or engine temperature being communicated to the ECU shows the engine is adequately warm. So, simultaneous injection is for cold starting, then as the coolant temperature tells the ECU that there is a rise in engine temperature, the ECU switches fuel delivery to sequential injection.
Rely rely tank you
There are a few rather big mistakes in this video that should be addressed but its very wel Made. Better than I could do if being honest. But as a whole I don't think this video is done it needs corrections made
What about mechanical injection?
You missed the Ducted Fuel Injection, which is soon to change diesel engines.
Will the life of the injectors for the GDI sytem be shortened since it's directly in the firing sequence in the combustion chamber?
Not really, they're made to last.
@@dragospahontu The negative is that direct injection does not clean the intake manifold.
@@Mr_Glenn Not the intake manifold, the intake valve
2:48 How can the fuel pressure regulator increase the pressure by alowing more flow?? if its after the rail it should restrain the flow so there will be more pressure inside the rail...
Pressure regulator increase the pressure by allowing more flow from pump and restraint after rail.
How could the simultaneous be better than sequential??
Which cars use dual injection system?
suzuki swift
Corollas and Camrys and also Lexus. (Selected models on some)
Suzuki Fronx
newer ecoboost engines
Not sure why but it is. When will ai demand pay for work and copyright? Doesn't seem fair that the work for free.
too much adds but tnx
What is gdi
Gasoline Direct Injection
GDI = God Damn It
And some decided to get rid of complexity and try out everything working on electricity.
💯👌🙏🙏🙏🇮🇳
Ok so the efficiency is a humans fringe group demand of some sort of nebulous "protect the environment" factor that is and has been easily gamed. No one is monitoring the waste of such compliance. Still fun choosing 30 mpg or 16 mpg while driving and not caring about tossing the car to the junk pile prematurely without a care because someone more "caring" has made that decision for me and I'm guilty free. I'm pickle Rick!
Want to help teh erff? Stop continuing to fuel after the click at the pump. You're just damaging you charcoal canister prematurely. Who's tracking waste emission charcoal vapor canister disposal? This is dumb buuuuuut. Love the choice we are permitted to have for now.
I find mult port injection simpler and easy to maintain.too comlex an engine isnt good for maintanance.
"save fuel" at what cost to you? $300 every 7 years vs $2000 every 5 years to maintain?
dual injection is very reliable and gives not just efficiency but extra power. a NA 4 cylinder today is more powerful than a small block v8 of the 80s
2end
direct inj. was bigest BS for normal street cars, port is the best....about how much can drive a street car in high rpm , daily ? .....5% ? with a young stupid petrol head 10% ?
it also allows for smaller displacement engines even reduce cylinders for the same power output. A dual injection NA 4 cylinder will have about the same power as a v6 with just port injection. One less head gasket, two less camshafts, 8 less valves.
in the video in GDI the fuel is inject3d during intake, and the guy says its during compr3sion... whats right???
Nice