CONTROL SYSTEM
TNV Application Manual
2-37
Torque curve and engine regulation
Standard engine torque curves are outlined in
. Details of the curves varies depending on the
engine models.
For the Eco-governor, engine regulations are available in the following variations:
(a) Isochroous
The engine speed is constant, regardless of the load (regulation 0%).
(b) Virtual droop (torque curve of base engine)
Approx. 7% regulation regardless of the engine speed. Regulation other than 7% is available as a spe-
cial option. Contact Yanmar for details.
The engine speed is kept until a torque equivalent to a load factor of approx. 30% is reached, in order
that the idling (non load) speed does not fluctuate even if installation of the engine on a machine caus-
es some power loss.
Even when virtual droop is active, it is possible that the engine speed does not decrease to lower than
the low-idling speed. (Optional).
(c) Reverse droop
Reverse droop provides fine speed control to the engine in a low speed range, preventing engine stall-
ing. This can be active with an external switch.
Figure 2-25
Standard torque curves
Mech. Governor Droop
(c) Rev. Droop(Only low
s
peed)
(
a
) I
s
o-chrono
us
(
b
) Img. Droop(Con
s
t. reg
u
l
a
tion:7
%
)
Engine
S
peed
Tor
qu
e
3
0
%
100
%
110
%
120
%
100
%
65 ~ 70
%
8
00min
-1
Img. Droop High idol
I
s
o-chrono
us
High idol
(R
a
ting+
3
0min
-1
)
00_Electronic_Control_System.book 37 ページ ２００６年５月２９日 月曜日 午後２時１２分
Summary of Contents for Yanmar 3TNV82A-B
Page 95: ...CONTROL SYSTEM 2 76 TNV Application Manual 00_Electronic_Control_System book 76...
Page 96: ...Appendix Standard harness 1 00_ _E fm 1...
Page 97: ...Appendix Standard harness 2 00_ _E fm 2...
Page 98: ...TNV Series service tool Operation Manual...
Page 132: ...32 7 Main Menu Figure 7 15 Data Logging Data Monitor Screen...
Page 145: ...7 Main Menu 45 Figure 7 27 System Installation Configuration Screen...
