Hyundai R 160 LC-3, Service Manual, Page: 186 / 459

5 - 3
GROUP 2 MODE SELECTION SYSTEM
Main control valve
Engine
Engine
speed
sensor
Main pump
Pilot pump
EPPR valve
CPU controller
Prolix
switch
Resistor Battery
P M
Fuel injection
pump
Accel
actuator
Motor drive signal Potentiometer signal Engine speed sensor signal
Mode switch signal
Engine speed switch signal
POWER MODE
H S L F
ENGINE SPEED
Drive signal
Emergency Normal
1. OUTLINE
Mode selection system(Micro computer based electro-hydraulic pump and engine mutual control
system) optimizes the engine and pump performance.
The combination of 4 power modes(H, S, L, F) makes it possible to use the engine and pump power
more effectively corresponding to the work conditions from a heavy and great power requesting work
to a light and precise work.
Mode Application
Power shift by EPPR valve Engine rpm
Unload Load
Current
(mA)
Pressure
(kgf/cm
2
)
160
Ź
30
260
Ź
30
430
Ź
30
440
Ź
30
700
Ź
30
700
Ź
30
2450
Ź
50
2250
Ź
50
2250
Ź
50
1750
Ź
50
1200
Ź
100
950
Ź
100
0
6
18
19
40
40
2200
2000
2000
1500
-
-
100
85
70
50
-
-
H
S
L
F
AUTO DECEL
KEY START
Heavy duty operation
Standard operation
Light duty operation
Finishing and precise operation
Engine deceleration
Key switch start position
Power set
(%)