Build generator with Yanmar engine

[brmax]

Many engines have mechanical govenors and are (set). Whether used for generators or other task. Being kinda brief, mfg's design engine components ie: camshafts to perform @ best effeciency at a certain governor setting, be it locked or within a parameter. Like a truck or tractor etc..
So in respect a solenoid to control a speed or rpm "with a bad fuctioning motor" is the same as a mechanical locked/set governor. Now to go further in some laymen terms both systems in generator land use the spinning of the armature to gather a signal and this is a measure both systems use.
If this measure is not in spec. Then it "the regulator" be it a mechanical or a circuit board like older sx460 or one of the newer ones can adjust slightly or shut down the system, if hertz or voltage isnt in set parameters. Hth

Floyd

[luvrbus]

Many engines have mechanical govenors and are (set). Whether used for generators or other task. Being kinda brief, mfg's design engine components ie: camshafts to perform @ best effeciency at a certain governor setting, be it locked or within a parameter. Like a truck or tractor etc..
So in respect a solenoid to control a speed or rpm "with a bad fuctioning motor" is the same as a mechanical locked/set governor. Now to go further in some laymen terms both systems in generator land use the spinning of the armature to gather a signal and this is a measure both systems use.
If this measure is not in spec. Then it "the regulator" be it a mechanical or a circuit board like older sx460 or one of the newer ones can adjust slightly or shut down the system, if hertz or voltage isnt in set parameters. Hth

While that is true they need to have a variable speed governor a limiting speed governor will not work on a generator

Floyd

[brmax]

Good point, the cruise controls would be like that. I was thinking of the consistant hi setting of a mechanical. Seems they work the same as electronic. Asking a certain speed to put the weights out there so to speak. Then in the same are variably opening the hole for more or less fuel to do it.  I can honestly see that being great with electronicly controled injection with dwell, but just not seeing it with the mechanical parts.
It seems a couple ways they (the big dogs) want this, some for good reason. Safety always goes with the newest typically and on n on. 
What I get curious about is the newest variable style, what do they do. In respect I can see the newest shutting down the gen motor and lighting a lamp. Or sending me a text message that five times today it had seen an issue.
Im just not sure I need the basic ECM to control this fuel solenoid throttle over the mechanical. I guess because the sc460 does this now. I can always use more home work help with it. I see it has many of the same key measures like with the varible voltage setting within a range if im not mistaken.  Im not sure that it can shut down the engine, but I do believe it can shut down output if not in a percent of its design and that being selectable. And sorry about this very long reply.
Have a good day everybody, and as always thanks Luvrbus for the knowledge.
Floyd

[richard5933]

Our Perkins has an electric governor which controls the engine speed. It is pretty a pretty basic mechanical setup that pulls the injector pump open with it has power. We set the speed with a set screw stop. Possibly something like this can be retrofitted to the Yanmar?

Richard

[Scott & Heather]

Richard even if I could find a way to govern the engine RPM, it seems that the bigger issue is the bell housing. How hard is it to adapt an SAE bell housing to an industrial Yanmar? I believe it only has the flat steel plate versus an actual bell housing. Sent from my iPhone using Tapatalk Pro

[brmax]

Scott, one of these wrench benders around here has a link or tip about this sae bell housing list. I say that because i did several years ago or 3 laptops and several phones ago, oh obviously the hard drive that i lost it on.
Anyway typically engines have this standard in their sizing and bolt up patterns. And these are listed somewhere as to which sae number that yanmar uses. Society of Automotive Engineers and thats world wide, and here I thought it was some american engineer haha
Im sure to get some feed back on that. Anyway thats it in a walnut shell

Floyd

[luvrbus]

You don't necessary need a bell housing for a generator head there are 1000's around driven with a flex coupling or drive shaft direct from the crankshaft of the engine

[richard5933]

That flat steel plate might be a bell housing. The one on my Perkins is pretty flat compared to one found on a car.

I just did a quick search and found lots of info from the boating world about adapter plates and bell housings for Yanmar.

Even an industrial engine there has to be something to connect the engine to whatever it is powering.

Richard

1964 PD4106-2412

[TomC]

There are two different kinds of alternator heads. First is what is called a single bearing where one end is support by a normal bearing and the other is supported by the engine. This would be used for a direct mounting to the bell housing.
Second is what is called a 2 bearing where both ends are support with a bearing with some type of shaft coming out. These usually can be used with a drive shaft with flexible coupling, or with belt drive (although belt drive needs to have the suitable bearing to support the side thrust of the belts).
I've seen giant EMD (locomotive engine) 20V-710 using shaft driven 2 bearing alternators. The main advantage to a single bearing direct mounting is compactness. With belt drive, by changing the pulley size you can have different rpms of the engine and alternator-like engine running at 2300 and alternator running at 1800. Good Luck, TomC

[Scott & Heather]

Ok I'll be removing the engine if I can tomorrow and see if I can take some pics of the end of it


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[Scott & Heather]

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[richard5933]

Looks to me like you've got a bell housing. That flat piece on the end with the 8 bolts is bolted to the end of the bell housing. That orange toothed thing looks like it bolted to the flywheel, probably in the same place where the flex plate of the generator head will connect. I'd be excited if this were mine - take off that cover and see what the dimensions of the bell housing and flywheel are. That cluster of bolts in the middle of the flywheel are the ones used to connect the flywheel to the engine.

I've attached the PDF that I received from Wrico - these are the sizes of bellhousing/flywheels they can supply adapters for. My understanding is that the three dimensions you're most interested in are the 1) internal opening of the bell housing & bolt pattern, 2) the size of the mounting area on the face of the flywheel and bolt pattern, and 3) the offset from the surface of the bellhousing to the surface of the mounting area on the flywheel.

Richard

[Scott & Heather]

Ok Richard Justin sent me a PDF too. I'll have to remove the cover to get in and measure. He's saying my engine only has 784 displacement which could translate into only 5000 or 6000 watts of generator power. this sounds low to me?


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[luvrbus]

That is set up for a hydraulic pump drive.looks to be same engine as the John Deere Gator uses 3600 rpm 48 cubic inches.fwiw the Onan 8000W diesel RV generator is just 719 CC so 6000 watts sounds low to me too  

[Scott & Heather]

Yep. This greens mower had tons of hydraulics. I'm starting to question wricos answers to me. Something isn't lining up.


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