Zapi COMBI AC1, User Manual, Page: 61 / 86

10.4 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.
AEQZP0BA – COMBI AC1 - User Manual Page - 61/86