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i20N Smartstream Engine
- Thread starter Galerion
- Start date
I don't want to argue, but I'm not mistaken.. Smartstream is the name for new generation of engines and some gearboxes by Hyundai. The engines with DPFI are only naturally aspirated, DPFI meaning dual port fuel injection, so there are two port injectors per cylinder, no direct injection. Engines which combine port a direct injection are not available for the EU market.No sorry but your mistaken, it includes the 1.6 & 1.6T.
Argue with Hyundai about their Smart Stream engine configuration. This is the NEW smart stream engine with DPFI. The Smart Stream only comes with DPFI. It’s not configured as a GDI.
The older GDI, which is the Gamma II GDI engine configuration which was also a 1.6 & 1.6T.
NUFF said!
Lastly, you say the old 1.6T was named Gamma II - that is incorrect. Gamma II is the new 1.6T with CVVD and it is the engine that's found in i20N. Old one was just Gamma and it shares nothing with Gamma II. So the i20N's engine is 1.6T-GDi Gamma II SmartStream with 350 bar direct injection - just four direct injectors, nothing else.
Actually I do. The gearbox is based on M6CF3-1 which is used in other models, but significatly modified and improved.
It has the following modifications:
Selected gear sensor for the auto rev matching
Clutch and gearbox are strengthend to cope with the higher torque and launch control
Carbon friction material has been added between the 1st and 2nd gear
Modified synchroniser locks from 3rd to 6th gear
Gearbox case is smaller to reduce oil capacity
Gear ratios have been altered
The i30N gearbox has undergone simillar treatment and is also based on unit already used in other hyundais
thanks for the detailed info. So since the i20N uses direct injection, I take it then Intake valves will in time, have a build up of Carbon around them, especially now we have a GPF and EGR valve to force exhaust gases and carbon back into the inlet manifold. AFAIK the T-GDI has the injector directly in the middle of he cylinder head. rather than on the intake valve side, am I correct?
The injector sprays fuel over the intake valves, so that might help to keep them clean, but depends on the driving conditions, the injector doesn't always spray with the intake valve open, but rather just before TDC, of course only time will tell..
The high pressure (350bar) fuel system is much better for fuel atomization, allowing for higer combustion efficiency which means it helps minimise particulate matter.
Injector is not on top, it is placed just under the inlet ports as you can see in the pictures
The high pressure (350bar) fuel system is much better for fuel atomization, allowing for higer combustion efficiency which means it helps minimise particulate matter.
Injector is not on top, it is placed just under the inlet ports as you can see in the pictures
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If it’s spraying directly into the CYLINDER its’s GDI, not port injection. What is being shown is, and described is port injection being sprayed over the valves. There is a big difference.
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If you saying its GDI, then what your describing is port injection, ie being sprayed over the valves.The injector sprays fuel over the intake valves, so that might help to keep them clean, but depends on the driving conditions, the injector doesn't always spray with the intake valve open, but rather just before TDC, of course only time will tell..
The high pressure (350bar) fuel system is much better for fuel atomization, allowing for higer combustion efficiency which means it helps minimise particulate matter.
Injector is not on top, it is placed just under the inlet ports as you can see in the pictures
GDI gasoline direct injection is injected directly into the cylinder or combustion chamber. Not over the valves as you’ve specified. There’s a technical engineering difference between the two.
By what you are describing and showing, I don’t believe you understand the technical difference.
The valve is in the intake port Venturi. If the injector sprays over the back of the valve body, It’s port injection not GDI.
Love to see where this service diagram specifies this is for the smart stream i20N engine.
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If there is one injector in the intake port Venturi spraying over the intake valves and one in the cylinder, it’s DPFI, not GDI.
There can’t be a port injector for the intake valves and be a GDI.
There can’t be a port injector for the intake valves and be a GDI.
By ''spraying over valves'' i meant the injector spraying directly into the combustion chamber, but positioned in a way that the spray pattern touches the intake valve when open.
Here are the pics from the manual.. Happy? Or do you need more proof? You were wrong, no shame in admitting that
I admit the webpage describing the smarstream technology is a bit misleading.Attachments
It can’t spray over the valve or it’s a port injector. This is what your describing. The head is comprised of separate chambers above each combustion chamber. These chambers house the valves, seals, cam shafts, bearings, and a sundry head parts including the VVT.
They cylinders are separate from the cylinder head. The head sits on top of the cylinder to seal the combustion chamber and is in turn sealed by the valves. There’s is no way to make a port injector, GDI or vice versa.
When you inject fuel air mixture over any portion of the valves, it’s considered port injection, not gasoline direct injection to the cylinder. Engineering wise you can have either port injection and or direct injection but you can’t have one injector physically doing both. The engineering doesn’t work this way.
They cylinders are separate from the cylinder head. The head sits on top of the cylinder to seal the combustion chamber and is in turn sealed by the valves. There’s is no way to make a port injector, GDI or vice versa.
When you inject fuel air mixture over any portion of the valves, it’s considered port injection, not gasoline direct injection to the cylinder. Engineering wise you can have either port injection and or direct injection but you can’t have one injector physically doing both. The engineering doesn’t work this way.
By ''over the valve'' i mean what is shown in the first picture. Direct injector whose spray pattern is partly ''over the valve''. I think it is pretty clear what i mean. Now that we are clear on what engine is in the i20N and that it uses direct injection, let's end this argument.
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The bottom photo shows both port and direct injection which is DPFI. The top photo shows port injection only.
As I stated above in the post. You can have both, Port and direct injections, which is consistent with Dual Port Fuel Injection as Hyundai has explained with the smart stream technology. Or you can have either; Port Injection or Gasoline Direct Injection.
One injector can’t handle both tasks. This is the factual engineering.
What your stating is; port injection and claiming it’s GDI.
As I stated above in the post. You can have both, Port and direct injections, which is consistent with Dual Port Fuel Injection as Hyundai has explained with the smart stream technology. Or you can have either; Port Injection or Gasoline Direct Injection.
One injector can’t handle both tasks. This is the factual engineering.
What your stating is; port injection and claiming it’s GDI.
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DPFI is Dual Port Fuel Injection menaning there are two port injectors per cylinder (one for each valve in this case since it's a 16 valve engine). DPFI is not a combination of direct and port injection, that would be what is commonly know as dual fuel injection. The first picture from my previous post phexDI-002.jpg shows Direct injector which is what the i20N has. The second picture shows the differences between port and direct. Dual fuel injection(NOT DPFI !) would combine the two
Your also saying and displaying diagrams of the older Gamma II GDI which is clearly not the same engine that is pictured in the i20N. The i20N has the smart stream valve cover imprinted with the smart stream logi as well. This has been pictured in both video and by photo.
I own a GAMMA II 1.6T in my 2020 Kia GT N-Line. What you are picturing is the same engine in the photos you’ve posted.
Again show us where your photos correspond directly to the i20N not the older 1.6T Gamma II engine. Note- just because the service manual says 2022, it is VN most likely just an updated service manual edition and doesn’t signify it’s for the i20N.
The service manual will specifically note it for the a specific model car. This is what you need to show and demonstrate. Not that it is for a 1.6T Gamma II engine which it signifies.
I own a GAMMA II 1.6T in my 2020 Kia GT N-Line. What you are picturing is the same engine in the photos you’ve posted.
Again show us where your photos correspond directly to the i20N not the older 1.6T Gamma II engine. Note- just because the service manual says 2022, it is VN most likely just an updated service manual edition and doesn’t signify it’s for the i20N.
The service manual will specifically note it for the a specific model car. This is what you need to show and demonstrate. Not that it is for a 1.6T Gamma II engine which it signifies.
Yes it can be, because DPFI can have both a cylinder/combustion injector and intake port injector. I challenge you to do the research.
I still don’t believe you understand the differences. What you’ve shown is a; intake port port injector/over the valve. Rather there is one or two per valve, it’s still a port injector, not a direct injector to the cylinder.
The bottom line here is; the valves will be cleaned by a constant flow of fuel over them. There will be no carbon build up on them from crankcase blow by that contains ; fuel, oil & water vapor, which when heated cause carbon deposits. As in a GDI.
I’ve been persistent due to a missunderstanding of; port injection vs gasoline direct injection. The smart stream i20N is port injected, so it won’t possess any of the inherent issues that the current Gamma II GDI experiences.
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You almost need a sub thread for this engine discussion
Regardless of technology I have reasonable faith in hyundais tech helped by backed by the longer that average warranty. To me it's often a little contradictory what I actually want concerning engine. Being cautious towards the very newest technology while also wanting the best performance and efficiency (that tends to come with the newest).
Regardless of technology I have reasonable faith in hyundais tech helped by backed by the longer that average warranty. To me it's often a little contradictory what I actually want concerning engine. Being cautious towards the very newest technology while also wanting the best performance and efficiency (that tends to come with the newest).
Okay now i think you are playing daft.
Gamma II is SmartStream engine, the current one, not the old one. Photos from the manual correspond directly to the i20N, you can see on top bar there is i20N(BC3N) selected, it will only show info relevant to the model selected. Don't teach me how to use my service manual. I'm a trained Hyundai technician, have been for 6 years now.
You are saying this is not a direct injector?!
Gamma II is SmartStream engine, the current one, not the old one. Photos from the manual correspond directly to the i20N, you can see on top bar there is i20N(BC3N) selected, it will only show info relevant to the model selected. Don't teach me how to use my service manual. I'm a trained Hyundai technician, have been for 6 years now.
You are saying this is not a direct injector?!
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You almost need a sub thread for this engine discussion
Yes it has gotten out of hand a little
I'll let him post his bs, he doesn't know what he's talking about, or he doesn't want to accept the facts. I'll stop because this leads nowhere and it shouldn't be in this thread.
In actuality, dual porting tech is not new. The newest smart stream technology has to do more with the constant valve adjustment technology.
I have several services and they all indicate which model car they are associated with. I’ve asked you this consistently over the past posts.
Being a Hyundai Tech, then you’d know the difference in port injection over a GDI.Then again maybe not.
So, I’ll leave this here for others to mull over, and for you to associate one with the
Then simply show us where the i20N is equipped with the older generation Gamma II engine. Put one with the other, it’s a simple request and will indicate it in the service manual.
I have several services and they all indicate which model car they are associated with. I’ve asked you this consistently over the past posts.
Being a Hyundai Tech, then you’d know the difference in port injection over a GDI.Then again maybe not.
So, I’ll leave this here for others to mull over, and for you to associate one with the
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