Hyundai Yanmar 3TNV82A-B, Manual

Page: 73 / 162

CONTROL SYSTEM
2-54
TNV Application Manual
Idling speed up
The feature allows the low idling speed to increase gradually until the coolant reaches a specified
temperature, helping the engine warm up quickly. See the figure below. See
Figure 2-46 . By default, the
"idling speed up" feature is disabled.
Figure 2-46 Idling speed up in cold conditions
Figure 2-47 shows the standard idling up settings and coolant temperatures. The settings can be changed.
(Optional)
Figure 2-47 Idling up settings
Blue and white smoke suppression
The feature allows the high idling speed to be limited when the coolant is lower than a prescribed
temperature, thus reducing the time required for vanishing the emission of blue and white smoke in cold start
conditions. See
Figure 2-48 . By default, the "blue and white smoke suppression" feature is disabled.
Figure 2-48 High idling speed limitation in cold conditions
The blue and white smoke suppression feature is available as an option for engines with a rated rpm of 2300
min
-1
or higher. When this feature is enabled, the high idling speed at a coolant temperature of 5°C or lower
decreases by approx. 100 - 200 min
-1
.
cool a nt temper a t u re a cceler a tor po s ition
s horten w a rm u p
au tom a tic a lly
usua l low idle s peed
engine
s
peed
Lo
w idle
s
peed
Cool a nt temper a t u re [°C]
- 3 0 10 0 -10 -20
Engine
s
peed[min
-1
]
3 0 40 50
0
100
200
3 00
400
500
600
20
cool a nt temper a t u re a cceler a tor po s ition
engine
s
peed
m a n ua lly m a n ua lly
s moke control
usua l high idle s peed
High idle
s
peed
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