UAV engine EFI installation manual-DLE120-V1.4
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Then adjust the servo motor to move the throttle wide-open, read and record the
“OnTime_ServoPWM_In” value, marked PWM1.
Step 4:
Calculate the offset and slope, to convert the signal of servo PWM to throttle
position.
Use the flowing equations to calculate them:
0.5= PWM1* VAL_ServoPWM2VoltSlope + VAL_ServoPWM2VoltOffset ( idle)
4.5= PWM2* VAL_ServoPWM2VoltSlope + VAL_ServoPWM2VoltOffset (Wot)
Basically, assume the 0.5V is the idle position, and 4.5V represents WOT position,
which is typically a conventional TPS sensor signal range.
For example:
At idle: PWM1 (OnTime_ServoPWM_In) =2.02 ms
At Wot: PWM2 (OnTime_ServoPWM_In) =1.31 ms
0.5= 2.02 * VAL_ServoPWM2VoltSlope + VAL_ServoPWM2VoltOffset
4.5= 1.31 * VAL_ServoPWM2VoltSlope + VAL_ServoPWM2VoltOffset
So,
VAL_ServoPWM2VoltSlope = -5.6338
VAL_ServoPWM2VoltOffset = 11.88028
Fill in the calibration data and burn to ECU, and then you can read the TPS signal:
changing from 0-100%.
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