Group 3 Automatic Deceleration System - Hyundai R480LC-9S Service Manual

GROUP 3 AUTOMATIC DECELERATION SYSTEM

GROUP 3 AUTOMATIC DECELERATION SYSTEM (CLUSTER TYPE 1)
Cluster
1. WHEN AUTO IDLE PILOT LAMP ON 1. WHEN AUTO IDLE PILOT LAMP ON
When all of the work equipment control levers including swing and travel levers are at neutral for 4
seconds, MCU sends throttle command ECM to reduce the engine speed to 1100 rpm. If the control
levers are at neutral for 1 minute, MCU reduces the engine speed to 1000 rpm. As the result of
reducing the engine speed, fuel consumption and noise are effectively cut down during non-operation
of the control levers.
When the Auto idle pilot lamp is turned off by pressing the switch or any control lever is operated, the
reduced engine speed rises upto the speed before deceleration in a second.
Engine rpm
Accel dial
set rpm
Auto idle
rpm
Low idle
rpm
Lever
neutral
2. WHEN AUTO 2. WHEN AUTO IDLE PILOT IDLE PILOT LAMP OFF
The engine speed can be set as desired using the accel dial switch, and even if the control levers are
neutral, the engine speed is not reduced.
※ Auto idle function can be activated when accel dial position is over 4.
Engine
ECM
Auto idle
pilot lamp
Auto idle switch signal
1100 rpm
4 sec
60 sec
LAMP OFF
5-11
(CLUSTER TYPE 1)
Work Travel
pressure pressure
Main control valve
Main pump Pilot pump
Pressure signal
Accel dial signal CN-16A
MCU
CN-16B
1000 rpm
CN-16
Normal
Emergency
Accel dial
4809S5MS05
1sec
Lever
Time
operation
4809S5MS07