Centrifugal Filter; Blow-By Gas Exhaust System; Open Or Passive System; Active O Blow-By Gas Recirculating System - Kohler SFGLD480 Operation & Maintenance Manual

2.11. CENTRIFUGAL FILTER

Combustion in diesel engines produces a large amount of soot or very fine-grained pulverised carbon particles
that are absolutely not retained in the oil filter.
In the case of gas engines, the problem is the presence of oil-borne contaminants in fuel gas (mainly biogas)
rather than the production of soot.
Centrifugal filters are not so common as the oil filters; their underlying principle is the heavier weight of solids
compared to oil. A centrifugal filter comprises a rotating circular body on the wall of which the solid particles settle,
while purified oil flows through a central duct to the oil sump.

2.12. BLOW-BY GAS EXHAUST SYSTEM

KOHLER engines can come with a passive or an active blow-by gas exhaust system.
2.12.1. Open or passive system (for diesel, gas and ethanol engines)
The commonest standard blow-by gas exhaust system is the open system with an oil separator followed by an
exhaust pipe to the outside. These are the components of such an open gas exhaust system:
The crankcase, which finally collects the gases that escape from the combustion chamber through the
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interstice between the piston rings and the cylinder liner.
The blow-by gas breather. It is made of one wire-mesh separator which separates the gas-borne thick liquid
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drops and feeds them back to the crankcase by gravity.
An exhaust pipe.
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2.12.2. Active o blow-by gas recirculating system (only for gas engines)
The blow-by gas recirculating system aims at introducing the crankcase gases, in a clean and effective manner,
into the intake air stream.
In the blow-by gas recirculating system, there is a filter that cleans the gases before they flow into the engine.
PRODUCT INFORMATION
IC-C-D-25-005e
DESCRIPTION OF LUBRICATION SYSTEM
2.3.3
INDEX
C
February 2012
FOR "V" ENGINES
DATE
Dep. 2
O&M_2.002211.810_A_10_2016
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