Hey guys.

 

Just thought i'd post this up in case anyone is interested!

 

For my final year project / dissertation I decided to investigate into how a blocked inlet manifold / intake system might affect the running of a diesel engine.

 

The way i'm going to do it is by inserting different sized blanking plates into the inlet tract, holes are36mm , 25mm and 5mm to see how the restricted air flow changes the performance.

 

I'm testing it on a 2.4 Duratorq engine and going to measure loads of parameters like fuel consumption, engine emissions, engine power, etc for each insert.

 

This is where the inserts are going to be located:

 

 

 

 

These are the proposed inserts I created in Solidworks

 

 

 

 

 

 

 

And these are the actual models I created in the Uni workshop today...

 

 

 

 

 

 

 

 

 

Should be conducting the experiment in a few weeks. Seriously can't wait to see the results!!

 

 

Anyway, just thought i'd post incase it's of interest of anyone.

Edited 23 January, 201412 yr by Dann2707

less sucky = less bangy. That's all you need to know. HTH

Sounds like my ex lol

less sucky = less bangy. That's all you need to know. HTH

Just print Lee's post out and hand it in. JD.

In all seriousness, good luck with it, will be a very technical read.

Does your university have an HPC system?

 

You project is something you could quite easily model with the right tools and then prove out, making it a more compelling write up.

Eg predict, simulate and then prove.

 

You say you're in Leeds, so which of the uni there are you at (if either)?

Does your university have an HPC system?

 

You project is something you could quite easily model with the right tools and then prove out, making it a more compelling write up.

Eg predict, simulate and then prove.

 

You say you're in Leeds, so which of the uni there are you at (if either)?

 

I haven't experience a HPC system. Can you elaborate on that matey?

 

The engine is being rigged up to the dynamometer this week and all the things measured are done on the computer. I'm not just going to drive the van if that's what you mean? haha

 

I'm at Huddersfield University

Won't the ECU complain and spoil your results by going into limp mode.

I haven't experience a HPC system. Can you elaborate on that matey?

 

The engine is being rigged up to the dynamometer this week and all the things measured are done on the computer. I'm not just going to drive the van if that's what you mean? haha

 

I'm at Huddersfield University

 

High Performance Computing facility (HPC facility).

 

Basically it lets you run complex simulations, such as large computational fluid dynamics models.

Systems can start small and grow.

 

I have to say I don't know the guys there personally, however this might be useful:

 

http://hpc.hud.ac.uk/

 

Feel free to drop me a PM if you have any HPC questions.

 

Won't the ECU complain and spoil your results by going into limp mode.

 

 

Hopefully not. I presume it would go into limp mode if the egr valve was stuck open and delivering excessive amounts of exhaust gas and no clean air but clean air will still be delivered, just a reduced amount!

 

I wonder if we could disable limp mode just incase though. Good point! 

Edited 23 January, 201412 yr by Dann2707

Looking at the HPC page at your uni, you'd be wanting to talk to them about "Fluent – Computational Fluid Dynamics (CFD)"

Hahahah that is so weird, check the PM I just sent you

Ha, that's kind of funny

 

Yep, you have it, exactly what you want to be using to model the system.

 

You could have a prediction, a simulation and what really happened, then if b and c don't match, you can write about why ( such as the ECU being a smart @$$ )

So I could insert the inserts into ansys, creating the flow domain to the same specification of the inlet tract and see how the results are similar / different to the actual test? 

Edited 23 January, 201412 yr by Dann2707

I suspect the air mass flow sensor will detect reduced flow for a given engine demand and trigger limp mode.

So I could insert the inserts into ansys, creating the flow domain to the same specification of the inlet tract and see how the results are similar / different to the actual test? 

 

 

Bingo...

The maf is situated well before the restricted insert Micmac

Will the insert(s) be going in AFTER the Mass Airflow Meter? If so I suspect you'll have a somewhat confused ECU!!! Could you be fooling it into thinking it's been transported to the Altiplano high in the Andes? 

 

We took a Fiesta 1.4tdci to Brittany some years ago, clouds of black smoke going up motorway hills, turns out the inlet hose BEFORE the air filter was collapsing in on itself when you revved hard; only found this out upon return to Blighty, fitted a later, stiffer replacement convoluted hose, problem solved.

 

Have seen Jags, Mondeos (and Land Rover Defenders?) that use the Ford 2L tdci do intermittent smoke puffs for no apparent reason.....

So I suspect it will smoke badly, or refuse to start, or conk out.....you could just ask an AA or RAC patrol to let them tell you what will happen, surely they come across some incredibly poorly-serviced engines, air filter casings with rags left in by technicians, that sort of thing!!!

If the insert is there, then it's going to restrict the air pulled in (As a filthy inlet would) and so the MAF is only going to register the restricted air flow and so adjust fueling.

They will be inserted after the MAF yes. Either way i'd imagine the restricted air is going to cause an air turbulence that will slow down the air travelling prior and after where the insert is located either way. That's the theory anyway! 

 

It's all learning anyway, I've seen EGR's that have been incredibly clogged up without triggering limp mode, just reduced power so hopefully this is going to re-create just that but give me quantitative data rather than "yep, cars slower than normal" haha

As the Pain Boys would say, there's only one way to find out!

Sounds interesting - be good to get a summary of the findings when done.

 

More interesting than my dissertation, that's for sure!

 

Edit - good luck!

Edited 23 January, 201412 yr by TriggerFish

Would an engine even start with a 5mm hole? And id be worried about the turbo carping the bed trying to force air threw it

I wouldn't suprise me if you blew the engine with the small hole resticter. The diesel engine runs on pure compresion once started and the glow plugs have shut off. the last thing you want is the bores filling with fuel and no air.

That's all to be found out

The technician said to me "this engine is yours. Do what ever you want to it, if it blows up it blows up. It's all in the name of research"

And when I told him the 5mm hole test will be interesting, he let out an evil laugh and said he can't wait to see what happens

When the the intake flap sticks on the 1.9 Diesel, when trying to start them it sounds as if they have no compression.  I do know from experience that the flap will stop a run away diesel engine, I had one that snapped a turbo shaft and it consumed most of its engine oil in seconds.