Setting PTO RPM

[CiapekC330]

As far as I know, this modification introduces the parameter ptoMotorRpmRatio. Is it responsible for the relationship between engine RPM and PTO shaft RPM? I’ve set this value to different numbers, but in my current tests I don’t see any difference. Regardless of the value — and even regardless of the tool’s ptoRPM value — a fixed engine RPM is set when the PTO is engaged.

Previously, when I tested it, this parameter did have an effect, but only up to a certain limit.

I tested it with the following tractors:

motorConfiguration name="C-4011" hp="42" price="0" motor torqueScale="0.188" minRpm="600" maxRpm="2400" maxForwardSpeed="28" accelerationLimit="0.5" brakeForce="0.8" lowBrakeForceScale="0.3" dampingRateScale="0.15" ptoMotorRpmRatio="0.8" mrInertiaFx="3.9" mrEngineBrakingFx="5.2" mrPtoPowerFx="1.07" torque normRpm="0.38" torque="0.65" torque normRpm="0.5" torque="0.9" torque normRpm="0.63" torque="1" torque normRpm="0.67" torque="1" <torque normRpm="0.75" torque="0.95" <torque torque="0.91" normRpm="0.83" <torque normRpm="0.92" torque="0.88" <torque normRpm="1" torque="0.72" motor
With this tractor (C-4011), when the PTO is engaged, the engine speed is always 1395 RPM.

motorConfiguration name="C-330" hp="30" price="0" motor torqueScale="1" minRpm="600" maxRpm="2300" accelerationLimit="0.5" maxForwardSpeed="24.5" maxBackwardSpeed="7" brakeForce="0.8" lowBrakeForceScale="0.2" dampingRateScale="0.15" ptoMotorRpmRatio="6" mrInertiaFx="3.9" mrEngineBrakingFx="5.2" mrPtoPowerFx="1.07" torque rpm="1000" torque="0.086" torque rpm="1200" torque="0.095" torque rpm="1400" torque="0.098" torque rpm="1600" torque="0.1" torque rpm="1800" torque="0.1" torque rpm="2000" torque="0.0975" torque rpm="2200" torque="0.094" torque rpm="2300" torque="0.08" motor
With this tractor (C-330), when the PTO is engaged, the engine speed is always 1270 RPM.

I remember that at some point the upper limit used to be 1717 RPM. Has something changed in this regard? What can I do if I want to set 2000 engine RPM for 540 PTO RPM? Does MR affect this?

[quadural]

Hi,

did you test at work or when the tractor is not moving (not working = gas pedal at 0%) ?
with MR, the engine will try to reach its pto speed only at work. When the gas pedal is at 0% => the engine speed will rev down to something near the max torque rpm.

Reason = this is more realistic (for me)
My ears were ringing when engaging the PTO in the game and being still. And moreover, with a manual gear box, this was "harsh" when starting moving.

Example IRL :
using a power harrow = when not moving and engaging the pto, you set the engine rpm to something "light" (1200 rpm for example)
Then, before lowering the power harrow, and while the tractor is already moving, you set the engine rpm to the required rpm (example : 1900rpm)
This is the "mechanically friendly way" of doing it.
=> engage the pto at low rpm with no load, start moving, set required rpm and lower the tool

Of course, if you are a little bit "reckless" (careless ?)
=> set the engine rpm full rpm, then engage the pto, then lower the tool, then start moving.