Kioti Tractor Tuning

[MinnesotaEric]

I don't know.... More power is nice.... But at what cost?
And what about the longevity and durability of the machine?
These are unknown factors that someone would have to test.
Any volunteers??

Parts for the 45-60hp are the same, the tune is different, so a change in the fuel map and maybe waste gate pressure, and poof, you have my 60hp machine. I'm fine with the power of my machine right now but i do need access to the codes and the ability to tell the ECU about new injectors.

 

[BossTractor]

Let's get r done...

I'm guessing you have to send the ECM to them and they do their thing.
I would need to see a guarantee with some kind of warranty on paper before I would do it.

Yes it's a bench top tune. Need to send ecu away. I'm looking into other options

 

[hillwood]

Parts for the 45-60hp are the same, the tune is different, so a change in the fuel map and maybe waste gate pressure, and poof, you have my 60hp machine. I'm fine with the power of my machine right now but i do need access to the codes and the ability to tell the ECU about new injectors.

I want 80HP.... Damm it... At the PTO!

 

[MickeyDBC]

After the warranty runs out on mine I would just like to be able to delete the DPF and EGR, the two things that seem to be the most troublesome on the Tier 4 diesels when they get older. Kioti claims that this is a 20K hour engine but I doubt that the DPF is.

 

[BossTractor]

Here's all the information I have dug up so far.

Daedong uses a Delphi DCM3.7 ECU for their engines
The Delphi DCM3.7 ECU has a Renesas SH705x micro controller that communicates to the EEPROM (electrically erasable programmable read-only memory) via 981 communication protocol

You can read/write to the EEPROM using a BDM (background debug module) bench top method. Basically you remove the back cover of the ECU. Place the ECU in a jig and use a module that is attached to the jig that has pins that you align with some diagnostic points on the ECU pcb and read/write to the EEPROM this way.

It is a rather common tuning method for vehicles not supported by a common OBD2 tuning software.

Once you get the information from the ECU it's just normal tuning, adjusting maps, turning off emission systems if you want.

I can't find any information regarding what communication protocol the diagnostic port uses to confirm if it is infact OBD2 and if a reader like a ELM327 would allow a person read codes.

 

[MinnesotaEric]

After the warranty runs out on mine I would just like to be able to delete the DPF and EGR, the two things that seem to be the most troublesome on the Tier 4 diesels when they get older. Kioti claims that this is a 20K hour engine but I doubt that the DPF is.

I'm wondering if a half-volt zenor diode soldered across the pressure sensor and a test tube installed in lace of the DPF would do the trick or if the ECU is smart enough to want to see a variable voltage comming back from the pressure differeial sensor. On page 12-77 of the service manual a 5 volt reference signal is sent out to the differential pressure sensor. Then:


"The differential pressure sensor detects the pressure difference between the inlet and outlet of the CCRT and sends a signal value of 0.5 to 4.5 V to the ECU. The larger the pressure difference between the inlet port and outlet port is, the closer the signal value gets to 4.5 V. The smaller the pressure difference is, the closer the signal value gets to 0.5 V."

The manual shows a picture of a DP5000 pressure sensor. I tried to unsuccessfully track this sensor down through Google, but it is the white wire that sends the signal (modified reference voltage) back to the ECU

Perhaps the internet can continue to puzzle this out frther.

And here a theretical way to build a circuit in place of the pressure sensor. Unfortunately, the Analog Behavioral Modeling is a little beyond my current skill-set.

Voltage-Controlled Resistor

I've also considered dropping in a digipot, but again, I don't know if the ECU is smart enough to kick into limp-home if it sees a constand signal or if the signal must have some variation.

http://www.analog.com/media/en/news...ection-guide/Choosing_the_Correct_Digipot.pdf

Anyway, my current high nail is just being able to interface with the ECU for service work, not modifying.

 

[BossTractor]

I'm wondering if a half-volt zenor diode soldered across the pressure sensor and a test tube installed in lace of the DPF would do the trick or if the ECU is smart enough to want to see a variable voltage comming back from the pressure differeial sensor.

I don't believe a zenor diode would be the thing to use.

Pressure transducers typically output a voltage ranging from 0-5v. You would have to know the voltage output the sensor outputs for a clean filter then use a resistor to bypass the sensor and output the right voltage to the ECU. I don't own a Kioti yet so I can't go look at the DPF differential pressure sensor to see if it's two separate sensors or one with two inputs from the filter. If two inputs to one sensor you would have to determine if the sensor just outputs a value for the differential. Or two values for input and output pressure that the ECU then uses to calculate differential pressure.

 

[MinnesotaEric]

I don't believe a zenor diode would be the thing to use.

Pressure transducers typically output a voltage ranging from 0-5v. You would have to know the voltage output the sensor outputs for a clean filter then use a resistor to bypass the sensor and output the right voltage to the ECU. I don't own a Kioti yet so I can't go look at the DPF differential pressure sensor to see if it's two separate sensors or one with two inputs from the filter. If two inputs to one sensor you would have to determine if the sensor just outputs a value for the differential. Or two values for input and output pressure that the ECU then uses to calculate differential pressure.

See the post above (lower right of manual page). It would be super easy to back-probe the white reference wire and determine the signal voltage right after a regen cycle.

 

[hillwood]

What are we trying to accomplish here?
I'm confused.

 

[hillwood]

I say, run what have or get rid of it.
If you need to modify it, then obviously, it is not the right machine for you.
If you can make it a better machine, please forward the information to Kioti so they can correct it!