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Old 08-20-2011, 03:30 PM   #1
bigrigbri
 
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Default CAT 3406e Diesel engine

Heres some pics of my work in progress of the notorious Cat 3406e truck engine.
Made from a pattern done by myself on the block and with purchased gears












[img][/img]



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Old 08-20-2011, 03:45 PM   #2
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Default Re: CAT 3406e Diesel engine

That's a beautiful piece of work. Your castings look to be right on. I'd be interested to know what you propose for the injection system.
And welcome to this forum.
Ernie J



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Old 08-20-2011, 03:51 PM   #3
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Default Re: CAT 3406e Diesel engine

That is beautiful, great workmanship. Have you figured out the E-injection yet. Will the injectors be E controlled? Can I guess the truck will be a 379 L ?

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Old 08-20-2011, 04:14 PM   #4
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Default Re: CAT 3406e Diesel engine

Thanks for the reply guys.
I will be puttin it in a 379l yeah.
For the in jection system I will be going the electronic route as ful scale and will be using 6 opto tranceivers at the back of the head on a distributor type of layout at the end of the camshaft fitted stealthfully as possible.
These will control 6 seperate circuits utilizing the 555 timer configured into monostable allowing adjustments on the internal resistance and capacitance giving varying output timing widths.
This output will be controlled through power transistors to handle the inductive loads of the valve coils.
For the mechanical side of the injectors I will be using the pintle ends of small full size injectors to act as the cam driven pump as these are micro finished in accuracy and i dought that I could replicate such a feat in the home workshop.
Small motorbike injector coils will be tried with the valving that comes with them as a "suck it and see".
Huge task all the same .
I have had the engine spinning in the lathe lashed up with the cam belt system to check for cam timing and to see oil pressure operates as should and to bed in some.
Had to squirt some model diesel fuel in there though as it spun to see poppin and black smoke!!!
Got some bore roundness issues though as the rings aint touchin fully around .

Brian

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Old 08-20-2011, 04:22 PM   #5
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Default Re: CAT 3406e Diesel engine

Short engine spin vid not running.

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Old 08-20-2011, 05:27 PM   #6
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Default Re: CAT 3406e Diesel engine

Beautifully done !!!

But I must admit that I'm a bit confused about what I think I see on the pictures.

Are there three camlobes per cylinder or is that just a trick of the light ?

How does the camfollower handle two valves that aren't equally distanced from the pivot point ?

Could you show us a close up picture of the valves, cam and follower on one cylinder please ?

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Old 08-20-2011, 06:05 PM   #7
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Default Re: CAT 3406e Diesel engine

This type of electronic injection uses a camlobe to run the pump portion of the injector, and a solenoid inside the injector to control fuel timing, start and stop duration = quantity. There is a bridge that connects two valves to one rocker arm for breathing.

A very ambitious project for sure. The full scale injector parts are not very big at all, 1/5 are real small.

You are using a Pintle type injector for a pump? would not a needle type be a better pump? just thinking out loud.

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Old 08-20-2011, 07:51 PM   #8
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Default Re: CAT 3406e Diesel engine

Welcome!

I am looking forward to this engine taking shape!

Dave

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Old 08-20-2011, 08:57 PM   #9
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Default Re: CAT 3406e Diesel engine

Them block anh head castings look amazing. Do you have any photos of the casting process, I for one would love to see them. Oh and welcome.

Brock
Are you using CNC or doing it manual.

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Old 08-20-2011, 09:14 PM   #10
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Default Re: CAT 3406e Diesel engine

This is simply stunning work
I would love to see the patterns & coire boxes
John



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