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VW Gen-Set Project

08/06/2009 8:49 AM

Hi -

Has anyone successfully attempted to make a gen-set using a used VW 1.6 litre (I think it's around 75 HP) diesel 4 cylinder engine as a prime mover?.

I've got an 1984 Jetta that's been taken off the road for about 10 years, but has a fairly good motor with 240,000 kms. The rest of the car has fallen to bits of rust.

It also serves as a fairly decent home for field mice and wasps.

I'm moving from the farmhouse where the car is located, but before I finish moving, and scrap the car, I'm asking - is it worthwhile removing the engine for such a noble purpose, and load down myself with yet another hobby/project.

This will be my yet to be completed hobby/project #57-021-EX.4

Me thinks that the biggest problem to solve would be the task of a governor hookup to maintain speed at 60 hz. @ 1800 rpm when loading down.

I'm an industrial electrician and can obtain a used or surplus properly sized generator for a song hopefully.

Any reasonable responses will be appreciated and considered - Thanx all - Loupy

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#1

Re: VW gen-set project.

08/06/2009 10:44 AM

I have not done it,but I think all you need is a governor setup from a diesel gen. or welder.

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#2
In reply to #1

Re: VW gen-set project.

08/06/2009 1:35 PM

Thanx - GA - That's the way I was leaning towards, but have never done it before, so an electro -mechanical adventure is for sure to be ensued if I decide to go ahead with it.

I've also heard of a solid state way of governing with a speed pickup putting a signal to an actuator to run the injector pump throttle.

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#3
In reply to #2

Re: VW gen-set project.

08/06/2009 7:47 PM

That's the way all aeronautical reaction engines are controlled in this days. I think it would be easy to do with a speed pickup from monopole type, a frequency reader with controller for proportional pickup, and an actuator from some kind to act over your injector. I think the most expensive of all is the frequency reader. The rest can be purchased in really afordable prices in the internet.

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#4

Re: VW Gen-Set Project

08/06/2009 11:10 PM

Great idea. Keep in mind the VW 1.6-D was about 53 horsepower normally aspirated at about 4,000 RPM (~40kW) so your power at 1,800 RPM will be considerably less. I figure you should be able to get between 10-20kW without too much trouble. I have considered the same thing for a vacation home that's too far from the grid. I would also use the waste heat for domestic hot water and space heating when needed. For safety reasons, you want to be sure to use code approved double walled heat exchangers if you want to use the engine coolant to heat your domestic hot water. I would be curious to know where you get the four-pole generator and the couplings. Keep us appraised of your project if you decide to proceed.

Cheers !!

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#5

Re: VW Gen-Set Project

08/07/2009 12:29 AM

Does it have cruise control?

Seems like that would get you at least part way there on regulation?

Once you got it set up as long as there was battery power, resume would get you back there.

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#8
In reply to #5

Re: VW Gen-Set Project

08/07/2009 11:06 AM

No cruise control on the original car but your's is not a bad option to considered - thanx

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#9
In reply to #8

Re: VW Gen-Set Project

08/07/2009 9:36 PM

Keep us "posted" on what ever option you choose [including none of the above]

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#6

Re: VW Gen-Set Project

08/07/2009 2:34 AM

Great idea. The VW diesels have a fairly flat torque-speed curve. To get better regulation than can be achieved with a motor governor have you considered adding a large VSD on the end of the circuit.

The motor-alternator would provide poorly regulated AC as a feed for the VSD and the VSD electronics would set the output frequency and voltage.

It sounds a bit expensive, but it's using off the shelf technology so it'll be working quickly and reliably.

An added advantage is that the VSD has smarter input/output, over current/over voltage protection.

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#12
In reply to #6

Re: VW Gen-Set Project

08/12/2009 10:01 AM

Really good app! Thank you - I never considered it before, but it makes perfect sense! It would be a near perfect regulation package, which would smooth out the surges & dips - I could even have 3 Phase power in my workshop - Thanx again - Loupy.

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#7

Re: VW Gen-Set Project

08/07/2009 6:19 AM

Here's exactly what you need. Jim Dunmyer has already done the work for you.

http://www.oldengine.org/members/jdunmyer/genset/

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#10
In reply to #7

Re: VW Gen-Set Project

08/09/2009 9:39 AM

Great read and valuble information. 8-)

Thanks for sharing the article.

Maximo

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Guru
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#11
In reply to #7

Re: VW Gen-Set Project

08/10/2009 11:18 AM

Thank you, Ian. As a matter of fact, I browsed this article a few years ago, but lost the link. Thanks for finding it again for me. Thanks again to all! - Loupy

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