@gpety I use a small needle valve to control the amount of natural gas that is feed into the engine. Trying to open the valve too wide will cause the governor to close the fuel rack completely and the engine will shut off because it needs a small amount of diesel to stay running. I marked the injector plunger with a scribe with the engine at an idle under no load. I then put the engine under a 2,000 load and started to slowly introduce the natural gas as i watched the fuel close.
Thank you for sharing your efforts, research, and information. I have been thinking how to implement NG and the standard Combination Gas Valve is a great solution.
@hotrod3737 I stop adding natural gas when the rack/plunger is back to the point where i scribed the line at a no load idle. While this is not an ideal situation most of my needs are in the 2,000 watt area. For me this is a simple setup and the engine has not been altered in any way. You may need to make a slight adjustment to the governor spring but that is no big deal.
Since this engine does not have a spark plug it would have to be modified with an ignition system to burn either fuel straight. I only use a very small amount of diesel to start the combustion process which is metered by the governor. This is the simplest way to do it and still retain the ability to run on straight diesel should I so chose.
If you still have this setup these 5 years later you should do a video of it running while you vary the amount of natural gas fumigation. In theory once you hit a certain amount the fuel rack should close completely and cause it to go into hit-and-miss mode. IE Engine speeds up Governor closes rack No pilot ignition Misfire Engine slows down Governor opens rack Fires too strong Repeat. This will of course allow some unburnt natural gas to go out the exhaust and maybe cause it to backfire.
my single cylinder has a built in speed governor that is set to 650 rpm and will open and close as needed to maintain that rpm. When the natural gas is fogged into the intake the governor will close down to keep the same rpm. I don't know how you would accomplish the in a car since the load rpm is not a constant as in generator use which is the main goal to maintain the same rpm. sorry I couldn't be of more help.
I did not try to run it on 100% natural gas as i am sure it will not ignite the natural gas only. That is why i run a small amount of diesel for ignition purpurposes. You would not want to add a glow plug as this would iginite the mixture in the intake tract when the intake valve is open. you could add spark ignition and some have but i like using the diesel for pilot ignition and when additional fuel is needed. in my setup the original governor is not changed or modified in any way
I understand the compression will not ignite the natural gas alone. Have you found this to be true when attempting to run 100% natural gas? Would a glow plug allow the engine to function with NG? Or just add a spark plug. I still has the high compression and thus efficiency!
Hi. Can you please tell me why the gas does not flow up and out of the Air filter? It seems like it would. Is it because there is constant suction from the engine? If it is, then the pressure regulation of gas would be critical. Am I right or is there something else?
I'm very interested in your system Are you still using it as a diesel / nat-gas ? What do you use the gen for ? What have you done with the crankcase vent ? How many hours is on your system ?
Yes still setup as nat gas / diesel. It is only used as a backup generator and our grid is pretty stable. It only has about 300 hours on it at the moment. For the crankcase vent i removed the stock vent and put in a check valve and a hose to the outside so all venting is done outdoors. Glad you like it
Glad you are using yours for chp i didn't go that route since its only for backup. We have 22.5kw of solar to handle the day to day. We make about 30 megawatts a year on solar and run all of our heating and air con using the grid tied solar and we still have some leftover at the end of the year.
$500 bucks sitting on a the dock in Mumbia..... Shipped to you?????? More.... Expect as much as 1500 in handling costs. Been there done that. Talk to an import broker before you pay any money out.
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@gpety
I use a small needle valve to control the amount of natural gas that is feed into the engine. Trying to open the valve too wide will cause the governor to close the fuel rack completely and the engine will shut off because it needs a small amount of diesel to stay running. I marked the injector plunger with a scribe with the engine at an idle under no load. I then put the engine under a 2,000 load and started to slowly introduce the natural gas as i watched the fuel close.
Thank you for sharing your efforts, research, and information. I have been thinking how to implement NG and the standard Combination Gas Valve is a great solution.
@gpety
when running natural gas the ratio is about 75% gas 25% diesel. Under 2,000 watt load it uses about 1 liter an hour when on Diesel only.
nice job I have a Lister as well would like to try this.
Very nice job.... vey well thought thru
@hotrod3737
I stop adding natural gas when the rack/plunger is back to the point where i scribed the line at a no load idle. While this is not an ideal situation most of my needs are in the 2,000 watt area. For me this is a simple setup and the engine has not been altered in any way. You may need to make a slight adjustment to the governor spring but that is no big deal.
Since this engine does not have a spark plug it would have to be modified with an ignition system to burn either fuel straight. I only use a very small amount of diesel to start the combustion process which is metered by the governor. This is the simplest way to do it and still retain the ability to run on straight diesel should I so chose.
If you still have this setup these 5 years later you should do a video of it running while you vary the amount of natural gas fumigation. In theory once you hit a certain amount the fuel rack should close completely and cause it to go into hit-and-miss mode.
IE
Engine speeds up
Governor closes rack
No pilot ignition
Misfire
Engine slows down
Governor opens rack
Fires too strong
Repeat.
This will of course allow some unburnt natural gas to go out the exhaust and maybe cause it to backfire.
my single cylinder has a built in speed governor that is set to 650 rpm and will open and close as needed to maintain that rpm. When the natural gas is fogged into the intake the governor will close down to keep the same rpm. I don't know how you would accomplish the in a car since the load rpm is not a constant as in generator use which is the main goal to maintain the same rpm.
sorry I couldn't be of more help.
@hotrod3737
very cool setup. What was your diesel consumption/hr when using 75% natural gas?
I like your safety solenoid setup too. very clever.
I did not try to run it on 100% natural gas as i am sure it will not ignite the natural gas only. That is why i run a small amount of diesel for ignition purpurposes. You would not want to add a glow plug as this would iginite the mixture in the intake tract when the intake valve is open. you could add spark ignition and some have but i like using the diesel for pilot ignition and when additional fuel is needed. in my setup the original governor is not changed or modified in any way
nice job
Like the air start, could you give me some idea what this engine alone cost? Did you buy it direct from India? Great job, btw
I understand the compression will not ignite the natural gas alone. Have you found this to be true when attempting to run 100% natural gas? Would a glow plug allow the engine to function with NG? Or just add a spark plug. I still has the high compression and thus efficiency!
Hi. Can you please tell me why the gas does not flow up and out of the Air filter? It seems like it would.
Is it because there is constant suction from the engine? If it is, then the pressure regulation of gas would be critical. Am I right or is there something else?
you are brilliant.
Wonderful!
I'm very interested in your system
Are you still using it as a diesel / nat-gas ? What do you use the gen for ? What have you done with the crankcase vent ? How many hours is on your system ?
Yes still setup as nat gas / diesel. It is only used as a backup generator and our grid is pretty stable. It only has about 300 hours on it at the moment. For the crankcase vent i removed the stock vent and put in a check valve and a hose to the outside so all venting is done outdoors.
Glad you like it
great vid, thanks!!!
I was curious if you have the data with how much fuel your lister takes per hour?
I have a listeroid that charges my 48v batteries and runs on used oil , all the heat is captured and heats my house CHP
Glad you are using yours for chp i didn't go that route since its only for backup. We have 22.5kw of solar to handle the day to day. We make about 30 megawatts a year on solar and run all of our heating and air con using the grid tied solar and we still have some leftover at the end of the year.
$500 bucks sitting on a the dock in Mumbia.....
Shipped to you??????
More....
Expect as much as 1500 in handling costs.
Been there done that.
Talk to an import broker before you pay any money out.
northerbrewer who imports them? I've been told the epa had banned the importing of Lister or Listeroid clones.