Kioti "linked throttle" question

[Beezz27]

I believe that Kioti calls it Linked Throttle, where the throttle increases and decreases with the pressure of the hydrostatic pedal, In this modern era I'm sure that is a fuel mapping situation within the ECM as opposed to an cable operated system.. So my question is, is there any way to retrofit this setup to a DK tractor? I love the Idea of having that as an option for loader work etc..

 

[npalen]

Following. I've often thought it would be a possible aftermarket product. Would almost think, however, that it would need to electronically operated/assisted to avoid additional force requirement on the hydrostat pedal?

 

[deezler]

Actually I believe it is a linkage/cable situation that basically takes over for your throttle lever, and links it to the pedal. So whatever the throttle lever on the dash does to control fueling, is now replicated by the hydro pedal. I don't know if the throttle cable goes to a sensor for the ECU control of fueling; I think it actually goes up to the common rail fuel pump as a physical control.

In other words, it's a well engineered, complex linkage arrangement, not a basic electronic hack.

I stopped using my linked pedal because it occurred to me, and was pointed out by others, that constantly ramping the engine speed up and down is likely to create a lot more soot loading in the DPF, and lead to more frequent forced regenerations. Think about how when you jack the throttle lever up real quick, you often see a puff of black smoke on any older or non DPF diesel. Your tier 4, DPF diesel is still doing this also, but the DPF is catching all that soot and clogging up until it regens.

So I just leave my engine speed around 2000-2500 rpm now all the time depending on what I am doing, how hard I am pushing the tractor, or how much ground speed I need. I do still throttle down to idle when hopping off to swap implements or do some quick hand work on the ground, as I can't bear to hear an engine screaming away for no reason for minutes at a time.

 

[Beezz27]

you often see a puff of black smoke on any older or non DPF diesel

That's the main reason I bought the DK when I did! Mine is a 2013 NON! DPF

Actually I believe it is a linkage/cable situation that basically takes over for your throttle lever, and links it to the pedal.

Seriously though, I'd like to see a picture of the throttle linkage setup if anyone has some time to snap a few!

 

[deezler]

I could take a picture under the floorboard, but I couldn't tell you what every rod or linkage is for afterwards haha.

I go against the grain a little bit on the DPF. I wanted one. Engine runs cleaner, a little quieter, much less unhealthy to be around the exhaust/emissions from. Basically putting my trust that manufacturers have ironed out all the kinks. It's a 10+ year old technology at this point, after all.
I bought my CK3510 with 103 hours on it last fall. At 146 hours now, and it has yet to force regen once on me; I think keeping rpms above 2000 and occasionally working her real hard helps keep it doing a passive regen. We shall see....

 

[npalen]

Actually I believe it is a linkage/cable situation that basically takes over for your throttle lever, and links it to the pedal. So whatever the throttle lever on the dash does to control fueling, is now replicated by the hydro pedal. I don't know if the throttle cable goes to a sensor for the ECU control of fueling; I think it actually goes up to the common rail fuel pump as a physical control.

In other words, it's a well engineered, complex linkage arrangement, not a basic electronic hack.

I stopped using my linked pedal because it occurred to me, and was pointed out by others, that constantly ramping the engine speed up and down is likely to create a lot more soot loading in the DPF, and lead to more frequent forced regenerations. Think about how when you jack the throttle lever up real quick, you often see a puff of black smoke on any older or non DPF diesel. Your tier 4, DPF diesel is still doing this also, but the DPF is catching all that soot and clogging up until it regens.

So I just leave my engine speed around 2000-2500 rpm now all the time depending on what I am doing, how hard I am pushing the tractor, or how much ground speed I need. I do still throttle down to idle when hopping off to swap implements or do some quick hand work on the ground, as I can't bear to hear an engine screaming away for no reason for minutes at a time.

Controlling the throttle physically off the HST pedal would seem the easier route as long as it didn't significantly increase the effort required on the pedal.

I can understand where, in some operating scenarios, one wouldn't want the engine constantly changing speed significantly. In other cases, however, it might be advantageous such as when roading and coming up to a stop sign. It seems that the engine slowing would help slow down the tractor quicker than just letting off the hydro in non-synchronized mode. Then the lower engine rpm while waiting would be more tolerable also.

I've never operated a tractor with hydro/engine rpm synchronized so don't have a good feel for it.

 

[Midniteoyl]

So I just leave my engine speed around 2000-2500 rpm now all the time depending on what I am doing, how hard I am pushing the tractor, or how much ground speed I need.

I run my idle (throttle) up to ~1400 - 1500rpm and still use Linked Pedal while tooling around or using the loader/grapple. No regen yet. I'm with you on the screaming engine thing..

 

[deezler]

Thats one good thing about Kioti's linked pedal design (maybe everyone's?) - is that you can still use the dashboard throttle lever to set a "floor" on the low end of your desired rpm range. So you can avoid it falling back down to low idle.

Maybe I will try some more of that soon myself, midnite. I was a little paranoid about frequent regens, but now I'm nearly 45 Hours in and have yet to experience one.