Group 3 Automatic Deceleration System - Hyundai HX145LCR Manual

GROUP 3 AUTOMATIC DECELERATION SYSTEM

Cluster
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 to 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 IDLE PILOT LAMP OFF
The engine speed can be set as desired using the accel dial, 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
CAN #2
4 sec
60 sec
Work Travel
pressure pressure
PS PS
Main control valve
Pilot pump
Main pump
MCU
Pressure signal
Accel dial signal
1100 rpm
5-6
Accel dial
Emergency
CN-16B
CN-16A
CN-16
Normal
1000 rpm
1sec
Lever
Time
operation
145ZF5MS05
140L5MS01