Is this a Imbert Gasifier or other, maybe some other Gasifier design of 1974 by Volvo ?
Bob
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Hi Bob, this is somewhat improved design, imbert type, Smp, cylindrical hearth, odd thing is this is designed to use wood chips, just above the nozzles there are a “distribution cylinder” like a bucket standing upside down, with holes in the sides, to keep the chips from “compacting” to much in the firetube, after what i heard it worked great at bumpy dirt roads, but a lot of bridging on paved roads.
I got some very blurry drawings of it, see if i can copy or draw off them.
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Göran, I think this is the one, right?
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Sounds like a standard Gasifier with cylinder firetube and no upside-down bucket with holes for small wood chips. Of course no turn down ratio design built into the firetube like a WK Gasifier. Yes if you could put up firetube design that would be great. I always like to look at designs I have never seen before.
Bob.
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Yes it is 
I looked after that pic but didnt find it.
Volvo built, after what I heard 40 of this cars, around 100 of these gasifiers totally, most got scrapped. 
Only thing i’ve found is a original instruction manual.
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That is a big hopper on that Gasifier. Maybe double lined hopper for gases moisture and it held wood chips? Did they mean what we call wood chunks? Humm I wonder.
Big tank on the side condensation tank. The other side filter? Very interesting.
Bob
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And here you can buy an instruction book for the unit, although it is probably a little older.
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Bob, I trust Göran on the wood chips. Production of this gasifer design was supposed to be scaled up to be used by the general public in Sweden during the oil cricis.
I THINK one tank is a hot fabric filter and the other one a condensation tank, but I can’t tell for sure.
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Your both right, it’s double lined hopper for condensation, and it’s intended for “chips”, there was also possibility to use chunks, in that case the “upside-down bucket” i mentioned was not used, and the restriction should be changed to a bigger one. They intended using chips for some important cars like postman, county Police, doctors, because the fuel could be directly supplied at paper mills in case of a fuel shortage.
There was actually about 40 of these cars in use at above mentioned services, during a 3 year period, to try it out, and train personal to be ready, also in the military they did this.
I could mention that people that get one of this cars, often against their will, wasnt very positive about it. 
Jan, that book you mention is for Volvo “eftertanken” as they where nicknamed during the war, probably a charcoal gasifier, but im not 100 sure about it.
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Volvo gasifier.
- Chip hopper.
- condensate tank
- Cooler condensate tank.
- Ash cleanout port.
- Filter, soot cleanout lid
Condensate gutter
Nozzles
Restriction
Air inlet
Hearth mantel
Grate, automatic shaken
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That is very impressive on this Volvo design not that far away from the WK Gasifier just missing WK Firetube design with turn down ratio build into it. A drop box and cooling rails I do not see. Must be doing hot gases through the filtering.
Bob
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Yes it is a hot filter, made from glass-fibre fabric, cooler is only a short pipe, with a smaller pipe inside, making cooling air passing outside and inside, sorry i have no better pic’s.
Cooler is the horizontal pipe between 5 and 3.
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They probably ran a cooler up front on the vehicle with metal piping to the cooler and engine. Or metal piping up to the engine. This piping is a cooler also.
Bob
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Yes, there was metal piping all the way, no additional cooler.
An old guy that learned me alot about woogassing told me; in sweden there is no need for a cooler because of low outside temperatures, he told me to use wide piping to get lower gas speed and therefore sufficient cooling, at my old Volvo i had 2x2 1/2" pipes step down to 3" then 2 1/2" before filter. After filter 2" to engine, worked well for me. Gas temp at inlet 30-40°c summertime.
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We are a little more moderate temperatures here just below the 49° latitude. More cooling tubes required to get the gases to due point to get the moisture to drop out of the gases.
Bob
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Yes, that makes sense, at my chevy i have a big cooler to get a “controlled” temperature drop, to get most moisture of the gas. I also have a condensate “trap” where gasline goes upward into engine compartment.
At this Volvo i think they just had a drain plug at gaslines lowest point.
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Goran how did you sew together your fiberglass sheet? Did you use a special thread in a sewing machine or did you staple it together?
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Hi Cody, i hand sewed it together, very time consuming, i sat at my front porch every afternoon, after work, almost a week 
, and the glass-fibre fabric made my arms itched, but i didn’t regret it when it was done.
I have thougt about some kind of cut-open pipes to “clamp” together the fabric when doing my new filter.
I got lucky with the sewing thread, i asked at a upholsterer shop if they could recommend something, she telled me she often repaired fireproof overalls for firefighters, and gave me half a spool for free this was spun glass-fibre sewing thread capable to withstand 1200°c. She also telled me i have to use a industrial heavy-duty sewing machine if i not sewed by hand.
I should see if i can find the spool, see if there is brand-name or something on it.
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Edit: Oops just realized I posted this in the wrong thread, moving it to mine.
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I would think that the heat in the filter container would far below the range of the high heat red silicone. It will glue the seams together after you staple the the seams. Kinda messy from my experience with using silicone.
Bob
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