Hyundai Yanmar TNV Series Manual page 58

Speed control
The target engine speed is defined by input signals from the accelerator sensor or through CAN
communication. Figure 2-28 shows the flow of defining the target engine speed. Elements and optional
settings in the flow will be described later.
The accelerator input selection feature allows certain accelerator sensors to be selected as input source
among others depending on the setting and status of accelerator sensors. (See page 2-31 for details).
The engine speed selection feature allows the target speed to be changed depending on the status of
external switches APP-IP3/IP4/IP6. (See page 2-49 for details).
The idling speed up feature allows the low idling speed of the engine to be raised depending on the coolant
temperature. (See page 2-54 for details).
The blue and white smoke suppression feature allows the high idling speed of the engine to be raised
depending on the coolant temperature. (See page 2-54 for details).
The governor control feature calculates the target engine speed for virtual droop. (See page 2-46 for details).
The accelerator filter suppresses fluctuations in target engine speed, minimizing overshoot or undershoot.
(See page 2-55 for details).
The low/high idling speed limiting feature checks if the target engine speed is in the range of the low idling
speed to the high idling speed and adjusts it if required.
TNV Application Manual
CAN communication
Accelerator sensor
(Terminal APS)
Accelerator input selection
Nset-1
Speed selection function
Nset-2
Idling speed increase function (optional)
Nset-3
Blue and white smoke suppression (optional)
Nset-4
Speed regulation
Nset-6
Accelerator filter
Nset-7
Low/high idling limits
Target engine speed defined
(Nset)
Figure 2-28 Flow of defining the target engine speed
(Optional)
· Constant-speed control
· Deceleration control (optional)
CONTROL SYSTEM
2-39