Paddle strategy stages

EMU PRO
1

Hi everyone,

I’m currently setting up a Paddle Shift strategy on an Ecumaster EMU PRO using a Closed-Loop configuration with a Barrel Position Sensor.

I need to clarify the exact logic the ecu uses to trigger the transitions between stages. Specifically:

  1. Pre-load: Does it end strictly after the “Pre-load time” or is it affected by the barrel movement?

  2. Pre-shift: Since I’m in Closed-Loop, does this phase end the moment the sensor detects the barrel has left the current gear position?

  3. Shift: Does this transition to “Post-shift” occur exactly when the target gear voltage is reached, or is there a specific tolerance window?

  4. Post-shift: What is the best practice to manage the handover to Torque Recovery?

Could anyone please share some screenshots of your Gearbox Setup or, even better, a log showing the Gear Shift State channel alongside Barrel Position and Torque Reduction? Seeing the transitions visually would be a huge help.

Thanks in advance for the support!

2

Correct. It ends exactly after the Pre-load Duration time. This is open-loop stage.

Correct. Pre-shift to Shift transition is done in the moment when Sensors Gear Position Sensor Voltage value left voltage range: [InV - LowT; InV + UpT] or timeout has passed.

  • InV = In-gear voltage for old gear
  • LowT = In-gear lower tolerance for old gear
  • UpT = In-gear upper tolerance for old gear

Shift to Post-shift transition is done when Sensors Gear Position Sensor Voltage value goes into voltage range: [InV - (LowT * Tol); InV + (UpT * Tol)] or timeout has passed.

  • InV = In-gear voltage for old gear
  • LowT = In-gear lower tolerance for old gear
  • UpT = In-gear upper tolerance for old gear
  • Tol = Sensors Gear Position sensor Tolerance engage factor

I assume you’re asking aboout up-shift.

From my experience in post-shift giving zero torque reduction with torque recovery ramp equal around ~8000 [%/s] and with actuator kept active is safe for the gearbox.

1 Like
3

I found very old log (from EMU PRO version 98.0, without Tolerance engage factor and Down-shift post-shift cylinders cut features) from BMW S65 with Tractive gearbox and MME (non-PWM) actuators.

11_20230629_1619_28.emuprolog (7.4 MB)
11_bmws65.emupro (27.1 KB)

It’s old but should give you overview of the strategy bahavior.
When analysing the log please pay attention to the Gearbox Gear shift State channel. It gives good idea of ​​the current state of the strategy