Shop manual máy đào HuynDai R170W-9 (Phần 5) Phần hệ thống cơ điện tử
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GROUP 3 AUTOMATIC DECELERATION SYSTEM
Work Travel
pressure | pressure
Main control valve Engine
ECM
Al Main pump _ Pilot pump
z
S
Cluster
Pressure signal Accel dial signal cN+eA[ CN-16
| —_ : Ke —
| Normal
| Auto idle [ F Z2)
a
Accel dial
„ Auto idle switch signal _ 14W95MS04
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 1000 rpm If the control levers are at neutral for 1 minute, MCU reduces the engine speed to 800 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 rom
Ỉ
Accel dial
Set rpm
rpm
4 sec
rpm
21095MS05
2 WHEN AUTO 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
x Auto idle function can be activated when accel dial position is over 4
5-6