Kubota CTL SVL97-2, Руководство оператора

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SCR (SELECTIVE CATALYTIC REDUCTION) SYSTEM
WARNING
To avoid personal injury or death:
• Do not allow the fluid that comes out of the muffler to contact skin. Wash or flush immediately with large
quantities of water after contact with fluid.
IMPORTANT :
• Modifying the SCR system is a violation of local laws and regulations. Do not modify the SCR system for
any reason, as doing so could result in monetary sanctions and fines.
• Do not run the engine when the DEF (AdBlue) tank is empty.
• If the remaining amount of DEF (AdBlue) is insufficient, the quality is poor, or if an abnormality occurs in
the SCR system, the auto regeneration and manual (parking) regeneration functions of the Diesel
Particulate Filter (DPF) muffler may not operate properly.
• The SCR system is intended to reduce or eliminate nitrogen oxides (NOx) from diesel exhaust gas.
The system uses Diesel Exhaust Fluid (DEF) as a reducing agent and hydrolyzes it with the heat of exhaust gas
to produce ammonia (NH3). The generated ammonia reduces NOx and decomposes them into nitrogen and
water for emissions reduction. Due to this NOx reduction from the exhaust gas, the odor of the exhaust gas
discharged from the SCR device differs from that of conventional diesel engines.
• Diesel Exhaust Fluid (DEF) is sold under many brand names, with one of the more common ones being AdBlue.
In the text, DEF is described as DEF (AdBlue).
• DEF (AdBlue) freezes below -11
℃
(12
℉
), but this does not affect the start-up of the engine.
The frozen DEF (AdBlue) is thawed by the heat of the engine coolant while the engine is running.
Structural drawing
(1) Selective catalytic reduction (SCR) device
(2) Mixing pipe
(3) Diesel particulate filter (DPF)
(4) DEF (AdBlue) injector (5) Aftertreatment control unit (ACU)
(6) DEF (AdBlue) pump
(7) Coolant valve
(8) DEF (AdBlue) tank (A) Exhaust gas before purification
(B) Exhaust gas after purification
(C) Coolant flow
(D) DEF (AdBlue) flow
EXHAUST AFTERTREATMENT DEVICE SCR (SELECTIVE CATALYTIC REDUCTION) SYSTEM
46
SVL97-2