Need diesel intake silencer for bobcat skid steer loader

[earthwerks1]

I'm new to this forum. I have a bobcat or more correctly a skid steer loader made by New Holland with a 3 cyl. Izuzu turbo diesel. The intake is only a few inches behind the operator's seat. It is not muffled. I'd like to know if there are any off-the-shelf silencers that I could install at the intake opening (approx. 3 - 3-1/2"), pricing and where to get them. The engine is approx. 78 hp, turbocharged, 3 cyl. and runs wide open at approx. 2600 rpm. Any ideas?

 

[MikeHalloran]

Earmuffs for the operator will be cheaper, but I understand why they're not a great solution.

Maybe somebody makes a silencer; I don't know. If not, you could make a tuned pipe sort of thing, given the fixed operating speed.

It might be simpler (though not nearly as effective) to erect a sound- absorbing barrier between engine and driver.



Mike Halloran
Pembroke Pines, FL, USA

 

[patprimmer]

You could make a pipe that runs from the rear of the vehicle to the existing air intake.

A correctly designed air filter should be a moderately effective silencer.

A plenum in the added on pipe or duct, especially if the inlet and outlet of the plenum are in different planes.

Regards

eng-tips, by professional engineers for professional engineers
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[earthwerks1]

Thanks guys for your input. The insulation method I looked into and isn't doable because of the many wires, control rods and hydraulic lines runing through this area, not to mention the air intake. The engine and pumps sit directly under and behind me. The intake is in a palce that is low in the engine bay out of the way of the dust and dirt that bathe the area.

Isn't there something that would affix to the open end of the intake pipe?

 

[MikeHalloran]

Next least awful thing to think about is boxing up the intake area to form a plenum, and feeding that with a generic air cleaner, through a hose if necessary.

Remember that Diesels take in a lot more air than gasoline engines of equivalent size, because they're always running with the throttle wide open, so you need a big air cleaner. I'd start with a hot rod air cleaner for a 350 Chevy, just because they're common.

The material of the plenum should be thick, and relatively massive. Many plies of fiberglass would be okay.



Mike Halloran
Pembroke Pines, FL, USA

 

[GregLocock]

You could use an exhaust muffler.

Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[earthwerks1]

Greg, how so? Until recently I wasn't aware of even such a device the silencer. The intake does have a factory air cleaner canister with a precleaner canister element. I thought I read somewhere that the slincer needs to have a small port or opening---what's that do?

 

[GregLocock]

The same principles apply for exhausts and intakes, so if you just want a quick solution, you can just use any old exhaust muffler on the intake.



Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[earthwerks1]

Ithink I'll try it for grins and giggles. There's a muffler shop next door and he owes me some favors. Stay tuned! No pun intended---ha!