Kubota D1803-CR-E4, Руководство по ремонту

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4.4 Control of intake and exhaust
system
• See DPF control
• See common rail system
RELATED PAGE
3.4 Control of common rail system (CRS) engine on
page 4-17
9.4 Control of diesel particulate filter (DPF) system on
page 4-76
4.5 Pre-cleaner
4.5.1 Outline of pre-cleaner
The pre-cleaner removes large debris from the intake
air.
4.5.2 Structure of pre-cleaner
The pre-cleaner is made up of a body and cover.
4.5.3 Function of pre-cleaner
Removal of large debris prior to entering the air cleaner
enables raising the maintenance interval of the air
cleaner
4.5.4 Specification of pre-cleaner
Airflow range Max. 2.5 m
3
/min.
4.6 Air cleaner
4.6.1 Outline of air cleaner
The air cleaner removes debris etc. from the engine
intake air.
4.6.2 Structure of air cleaner
The air cleaner is made up of an air cleaner, housing,
element, and dust cup. Clean air is essential to
satisfactory performance and long engine life.
The air cleaner must be able to remove fine materials
such as dust and blown sand as well as chaff, or lawn
from the air.
(1) Air cleaner housing
(2) Secondary element
(3) Primary element (4) Dust cup
(5) Evacuator valve
4.6.3 Function of air cleaner
The air cleaner removes debris etc. from the engine
intake air.
It also reduces noise generated by air intake.
4.6.4 Specification of air cleaner
Cleaning efficiency 99.9% or higher
Operating temperature range
-30 to 80
℃
-22 to 176 ℉
4.7 Turbocharger
4.7.1 Outline of turbocharger
The turbocharger uses the engine exhaust gas to
compress intake air.
The turbocharger increases engine output.
4. ENGINE
MECHANISM
4. Intake and exhaust system
4-40
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
KiSC issued 12, 2018 A