Hyundai Yanmar 3TNV82A-B, Manual

Page: 74 / 162

CONTROL SYSTEM
TNV Application Manual 2-55
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.
Figure 2-49 Effect of the 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.
Figure 2-50 Connection diagram for block heater control
Time
α
β
[Acceler a tor s tr a ight]
T a rget S peed
Act ua l S peed
Time
Over s hoot
[Acceler a tor filter]
Longer ri s e time
a d a pt
α
a nd
β
b y in s t a ll a tion te s t
Engine
S
peed
Engine
S
peed
ECU
APP-OP2(E2)
AC115V/210V
Block he a ter
AC115V: 171015-77900
AC210V: 46150-504500
E4 8
E45
Block he a ter rel a y
B a tt.12V
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