Need To Help Four Stroke Combustion Engine on 3D model

Hi,

I’m making a training tool/website to help people learn about engineering, but I’ve got a bit of a problem. I was working on 3D model of an engine and labelling parts etc. but there is one piece whose function I do not known (see below image).

I’ve asked around but no one I know seems to know what it is. The second below image is a close-up.

This is what I do know:

• Lit is belt driven so it turns (possibly centrifugal filter?).
• The pulley is small so it turns fast.
• There seems to be a connection to the lube oil sump.
• There are jubilee clips so it is easy to remove (which again points to some sort of filter).

So, does anyone know what it is? Item ‘2’ on the below image is for a lube oil filter (probably, informed guess), so why would they have a secondary filter on the suction side of the lube oil system (assuming that it is a filter and it is related to the lube oil system)?

The model can be found at the link below, it is interactive so you can zoom in to get a better look etc.

http://www.3d-knowledge.com/full-screen-four-stroke-combustion-engine.html

LINK
Any help is welcomed!!!

Edited By JasonB on 11/02/2017 10:17:21

Edited By JasonB on 11/02/2017 10:18:37

Hi Jon,

There are some odd things about this engine model. I think the big canister at the side of the engine, with the small pulley on the front, is intended to represent a belt drive oil pump. To support this idea: In the side view the oil suction line is shown going from the sump to a point midway down the big canister, and there's another line next to it that may be the oil supply line. I've never seen an engine laid out quite like this but that does not mean it isn't so, or it could just be artistic licence of whoever laid the engine CAD model. Maybe this engine has a large secondary oil filter (maybe centrifugal as you mention) built around the oil pump which would usually be much smaller than the shown canister.

It might be wiser to find a CAD model of a simpler more conventional engine for your website, if you're teaching the basics. If you could find a fuel injected non turbo 4 cyl gas engine as found in many small cars, the student would be able to find a real one under the hood of many common cars to compare it with.

They'd be looking a while to find a real one exactly like your CAD model I think, unless it's a commercial truck engine - I don't see those much. JD

Hi Jon,

Item 2 in your link is an Oil/Lubrication filter and Item 3 is a fuel filter. Click on the item numbers in the model and a description is displayed.

Paul.

The pictures aren't showing, but from your description of its position and appearance I think you're referring to the alternator.

<edit> Ah! picture is there now, yes, it is the alternator.

Neil

Edited By Neil Wyatt on 11/02/2017 10:22:37

Comments removed

Edited By Paul Lousick on 11/02/2017 10:32:32

If you read teh opening post it is Jon that has labled the parts, but he needs to know what the item I pointed to in pink is. I'd say a pump

Air conditioning Pump ?

martin

I'd go with Neil's alternator but I don't recall seeing an alternator with an oil feed going through it. Still it is a bit of an up-market engine to start with as a learning aid and of course you can't see the really interesting bits like pistons, con-rods, crankshafts and the like!

John

Edited By Journeyman on 11/02/2017 10:53:18

I'd go for aircon compressor or power steering pump.

Well, item 23 (pipe connecting the sump to that item is labelled oil suction pipe connecting the sump to the lubricating oil pump or words to that effect. So I guess it is the oil pump although it looks a bit big for that.

Russell.

It has studs on the back, and there's no sign of anything else that could be the alternator.

It's huge if its the oil pump, oil pumps are small high-pressure things, not big low pressure things. and the inlet/outlet seem to be misplaced for a pump,

Surely the oil pickup should be inside the sump, and oil pumps are usually pretty much within the block.

I think it's an oil cooled alternator. Rare breed.

Neil

Item 23 seems to be a pipe that runs between the sump and the item in question.

If you click on item 23 it says: "Lubrication Oil Suction Pipe. The suction pipe connects the sump and lubrication oil pump (suction side)"

So I would say it's a lubrication oil pump. If you look at the other pipe from the item in question, it seems to go to the side of the bock, maybe feeding oil galleries.

Regards

David

Begs the question "Is it a real engine?" Possible an illustration only. All the small (car) engines I've seen have an internal oil pump driven directly off the crankshaft.

John

Edited By Journeyman on 11/02/2017 11:31:21

But the labels have been put on by the OP who doesn't know what it is, so we can't rely on what the labels say.

The original model (with internals) is here:

www.cgtrader.com/3d-models/vehicle/part/diesel-turbo-engine-with-interior-parts

It's the first hit if you put 3D model V6 engine into google images. It's also on some other 3D sites.

Looking at the level of detail I guess it's not an actual engine. There's a complete lack of fixings and six separate cylinder heads is unusual for a real engine, although some parts are modelled well otehrs are very simplified. (no valve guides.

So it may just be artistic licence.

John & Neil, I have to agree that it doesn't look like a real engine.

David

As it's not a real engine, then its pretty useless as a training aid, so perhaps Jon you should start again?

Jon - some of the other points of that engine look a bit odd as well - 4 valves but only 2 push rods per cylinder with the vales actuated in pairs by a bridge piece that the rocker arm bears on. As you said, if the cylindrical part is the oil pump then external drive seems very odd (what happen if the belt breaks or comes off - it's been known?) and unless the engine is very low revving would be going a a heck of a speed with subsequent high power consumption just to push the oil round, as well as the possibility of inducing foaming in the oil - which you don't want.

You could be in danger of showing your would be learners some dodgy engineering I think.

That 3D model costs $350 - $450 to buy; if it's been bought, I doubt it will be replaced in a hurry.

Neil

Separate cylinder heads are common on lorry / truck engines. And the various oil filters etc look typical for a commercial vehicle (CV) engine.

The clue's in the description which contains German misspellings. Sure enough, if you take a gamble and check out "Mercedes Benz V6 diesel truck engine", you seem to come up trumps It looks like a copy of the OM 421 A engine which is the V6 version of a family of modular construction. I notice the Mercedes symbol has not been modelled!

Murray

It's not an oil pump then. They either have gear pumps (8-shaped) or round rotor pumps, but the round ones are fitted directly on the crankshaft.

usual place for an alternator seems to be on top.

I can't seen any pictures of engines with anything fitted where that cylinder is on the 3D model.

Neil