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Minneapolis Moline Tractors Discussion Forum
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GVI Diesel and energy cells

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Howard H.

11-24-2003 08:20:28




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Hi Ya'll,

I found a very nice GVI diesel over the weekend that came with the manuals.

In the service manual, it talks about "energy cells" in each cylinder and shows a diagram of how they come apart.

It doesn't really say what they do or how they work, but there are no moving parts, so I'm a little puzzled...

What do they do? How do they work? Were they a success or just a gimmick?

Also, does anyone know how many GVI diesels were made in relation to LP or gas GVI's??

Thanks for any info!
Howard Henderson

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Bob M

11-24-2003 17:02:05




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 Re: GVI Diesel and energy cells in reply to Howard H., 11-24-2003 08:20:28  
Howard - D-17 Dave and JK have summarized energy cell operation pretty well. Upside is they reduce the characteristic diesel "knock" - makes for a smooth running, quiet (relatively…) engine. The downside is energy cells make for harder starting especially when cold. Also throttling losses in/out of the energy cell chamber and heat loss in the chamber result in lower overall volumetric efficiency - i.e. increased fuel consumption relative to direct injection diesels. It's an obsolete technology today.

I believe Dave is right that it was licensed as the "Lanova" combustion system. I know Buda (Allis Chalmers and early Oliver), Waukesha (later Oliver) and MM all used the Lanova design - no doubt other mfr's (Mack? etc.) dabbled with it too.

Someplace I have a photo of an Oliver 88 diesel (Buda) with the energy cells clearly visible on the left side of the head.

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D-17 Dave

11-24-2003 19:50:32




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 Re: Re: GVI Diesel and energy cells in reply to Bob M, 11-24-2003 17:02:05  
Bob, you spoke of throttle loss. Do you mean sluggish rpm change? If so I must have done something right, My 262 will spin both rear 16.9-28 tires off idle to heavy throttle in high gear.



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Bob M

11-25-2003 06:38:54




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 Re: Re: Re: GVI Diesel and energy cells in reply to D-17 Dave, 11-24-2003 19:50:32  
No Dave - has nothing to do with throttle response. "Throttling loss" is the engineering term for energy consumed pushing compression air into, then combustion products back out thru the energy cell orifice. It affects only the engine's fuel efficiency (fuel economy) - not power/torque developed. A properly designed energy cell can actually INCREASE engine torque within a certain RPM range by spreading combustion pressure buildup over more of the piston downstroke....exactly as you have observed.

Gotta remember when energy cell diesel chambers were in fashion, diesel fuel ran 10 - 15 cents/gallon. Engine fuel economy was not the priority it is today!

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D-17 Dave

11-24-2003 15:28:47




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 Re: GVI Diesel and energy cells in reply to Howard H., 11-24-2003 08:20:28  
The energy cells in early MM are the same as the 230 and 262 Allis diesels. Not many truly understand the purpose of these . They are not a precumbuston chamber, however these heads do use an air space under the intake valve. The energy cell is across from the inj. and takes a small amount of fuel each time the inj. fires. When the cyl. fires the pressure on the piston in standard cumbustion is around 650psi. at the same time the cyl. fires the fuel in the cell fires ind the pressure inside the hourglassed shaped cell goes up to around 1300psi and is metered back out into the cyl. into the air chamber giving 2 added things. First the disturbance in the burn patern causeing more complete cumbustion and increased fuel economy, second the metering of the high pressure continues to push on the piston head long after combution stops to give it exelent torqe. The down side of this system is by bleedind off part of the compretion during slow starts it makes it a little contrary to start when their cold. It does give it exelent torqe and very good fuel ratings. Hope this has'nt went on too long, and hope it helps. I forget the term but I think they called this the LANOVA design. Dave.

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Destiny

06-26-2007 19:27:17




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 Re: Re: GVI Diesel and energy cells in reply to D-17 Dave, 11-24-2003 15:28:47  
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JK

11-24-2003 13:45:28




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 Re: GVI Diesel and energy cells in reply to Howard H., 11-24-2003 08:20:28  
Howard,
Energy cells are like precombustion chambers. They hold some heat and cause the explosion to bigin in them then travel throughout the rest of the cylinder. Supposed to cause the explosion to be less violent & make the engine run smoother. The injector sprays some of the fuel directly accross the cylinder into the small hole in the end of the energy cell.

Sometimes the small hole toward the injector gets full of carbon so they don't work right & need to be taken out/apart & cleaned.

Massey, Case, Moline & I think oliver used them in their early diesels. Later models were direct injection (no precombustion chambers).

John

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