turning up the fuel on a ck27

[thepumpguysc]

OOOHHH.. IT LOOKS LIKE..
Your right.. it IS germane..
BUT the SIMPLE ANSWER is YES with the turn of a screw or a computer the hp CAN be changed.
Momma said thered be days like this..
that's what I get for being a Jenius.. :laughing:

 

[SPYDERLK]

So what's the OP have? It looks from his pic to be modern. This is germane to the conversation....
and oil burners do react to increases in fuel like gas engines. There's basic physics involved here: Theres X amount of btus per volume of fuel and it needs to be mixed in the right stoichiometric ratio with O2 and ignited for it to release the energy. Its exactly the same. The only difference is that diesel is ignited under compression and gas requires an outside energy source to start the combustion. This basic process is the same for ALL oxidized chemical reactions. Add more fuel, you need more air or you get outside of the stoichiometry and the process doesn't release all of the energy in the fuel. Add more air without adding more fuel, same problem. You can mess the equation up to either side and the engine wont run.

Adding more air in a diesel is not the same, or any, problem. They always take a full lungful of air and moderate the fuel for needed power -- up to the max burnable in the air charge. This is due to the fuel being injected into a hot dense O2 rich environment.

 

[dfkrug]

All older straight CK series have a mechanical injection pump even my
2014 CK35 is a mechanical injection pump. They didn't go to the ECM injection until the tier 4
engines CK2710 CK3510.

You are correct: all these M27 tractors have mechanical FI, CK25/27/30/35, CT225/230/235. The
DaeDong xx10s are electronic.

As for increasing the pressure of a fluid thru a fixed orifice, that always increases the flow rate (volume).
That basic principle of hydraulics also applies if you put a spring and needle valve in there so that
the flow does not start until the pressure overcomes the spring, as in a mechanical injector.

 

[adventure bob]

DF id agree that on paper the straight math says that. Fluid dynamics however would show some seriously negative effects on flow characteristics with regard to decent burning, as the pressure goes up. An increase in pressure doesn't always result in flow characteristics that are appropriate for combustion. Yep more fuel may go through but if goes through in a stream its pretty much going to hamper combustion, not help it. Additionally fuel at the higher pressure may have a negative effect on the propagating flame front.

In the mechanical poppet style, isn't it possible to increase the fuel pressure so that you inadvertently alter injection timing? Essentially injecting too much fuel too early?

 

[dfkrug]

In the mechanical poppet style, isn't it possible to increase the fuel pressure so that you inadvertently alter
injection timing? Essentially injecting too much fuel too early?

There are several variables at play here, not just pressure and volume. If you are adjusting for more volume
in a diesel FI system, as PUMP points out above, then your pressure is not usually variable. Clearly
there are limits to the adjustments available within some narrow range. Timing of these mechanical
pumps is often pretty simple: on my JDs, you just loosened a couple of bolts and rotated
the whole pump a few degrees either way about its input shaft axis.

I have yet to mess around with my Kioti FI system.

 

[adventure bob]

It appears that cranking up the fuel pressure on a Cummins with a p7100 pump was pretty easy as well, just don't know how in those mechanical systems you adjust for fuel event timing. If its sucking in a certain volume of air and you just throw more fuel in, or worse more fuel in earlier, what does that get you other than cylinder quench? I fully appreciate electronic fuel control much more now...

 

[ritcheyvs]

Maybe this will help explain mechanically-injected Diesels.

As far as I can tell only the xx10 models have common rail (electric) injection systems.

 

[dfkrug]

I fully appreciate electronic fuel control much more now...

You can do a lot more with electronic-controlled diesel FI, tho the parts cost more. The solenoid-operated
injectors can fire multiple times on one stroke, and run 10 times the pressure of a mechanically-injected
system.

 

[thepumpguysc]

Can anyone tell me what this has to do w/ the question originally asked??
This is a HELP FORUM.. not a keyboard engineering class.. start your own thread..

 

[Amvcane]

Where's Fred and his hair dryer?