Hyundai Yanmar TNV Series Manual page 74

Accelerator filter
The accelerator filter regulates the trade-off between acceleration/deceleration time and overshoot/
undershoot during acceleration or deceleration. This feature is factory set appropriately, but a higher priority
may have to be given to either the reduction of acceleration/deceleration time or the suppression of
overshoot/undershoot depending on the engine applications.
Figure 2-49 shows the effect of the accelerator filter. The accelerator filter delays reaching the engine target
speed, thereby avoiding overshoot and undershot while trading off the speed responsibility of the engine.
[Accelerator straight]
[Accelerator filter]
Block heater control
This feature allows the block heater to be turned on or off by an external coolant-temperature monitoring
relay as long as the E-ECU power supply is on. By default, the block heater relay turns on when the coolant
temperature decreases to 15°C, and turns off to disable the block heater when the coolant temperature
increases to 50°C.
Figure 2-50 shows a typical connection diagram for block heater control.
Batt.12V
TNV Application Manual
β
α
Figure 2-49 Effect of the accelerator filter
E48
Block heater relay
ECU
APP-OP2(E2)
E45
Figure 2-50 Connection diagram for block heater control
Over shoot
adapt α and β
by installation test
Time
Longer rise time
Time
Block heater
AC115V: 171015-77900
AC210V: 46150-504500
CONTROL SYSTEM
Target Speed
Actual Speed
AC115V/210V
2-55