Zapi COMBIACX, User Manual

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Page - 58/81 AFCZP0BC- COMBIACX & ACEX - User Manual
11.4 Description of the throttle regulation
This regulation applies a not linear relationship between the position of the
accelerator and the speed of the truck. The main goal is to increase the resolution
for the speed modulation when the truck is slowly moving.
Three adjustments are used for the throttle regulation:
1) THROTTLE 0 ZONE
2) THROTTLE X POINT
3) THROTTLE Y POINT
THROTTLE 0 ZONE: the speed of the truck remains at frequency creep meanwhile
the voltage from the accelerator potentiometer is lower than this percentage of the
MAX VACC setting. This adjustment define the width of a dead zone close to the
neutral position.
THROTTLE X POINT & THROTTLE Y POINT: the speed of the truck grows up with
a fixed slope (linear relationship) from the THROTTLE 0 ZONE up to THROTTLE X
POINT. This slope is defined by the matching between the X point percentage of the
MAX VACC setting with the Y point percentage of the full truck speed.
From the X point up to the MAX VACC point, the slope of the relationship between
the truck speed and the accelerator position is different (see figure below) to match
the full speed in the truck with the MAX VACC voltage in the accelerator position.