Air System(空气系统)
作者：重庆蜀阳商贸有限公司 来源：本站 发表时间：2017/10/30 17:30:28 点击：995
The diesel engine requires hundreds Qf gallonsofair
for every gallon of fuel that it burns.For the engineto
operateeficinly it must breathe freely; intake and
exhaust systems must not be restricted.
The intake air should always be routed through anair
cleaner.The cleaner may be mounted on the engine
or equipment and may be either oil bath,paper elem-
ent or composite type depending upon engine applica-
tion.Air is routed from the air cleaner directly to the in-
take air manifold,or turbocharger.
NTA Aftercooler
An aftercooler (or intercooler as it is sometimes called)
is a device in the engine intake system designed to
reduce intake air temperature and/or preheat intake
air temperature.
The aftercooler consists of a housing,used as a port-
ion of the engine intake air manifold,with an internal
core.The core is made of tubes through which engine
coolant circulates.Air is cooled or heated by passing
over the core prior to going into the engine combust-
ion chambers.Fig.5-8.Therefore,improved combust-
ion results from better control of the intake air temper-
ature cooling or warming as applied by the aftercooler.
Turbocharger
The turbocharger forces additional air into the combu-
stion chambers so the engine can burn more fuel and
develop more horsepower than if it were naturally as-
pirated.In some cases the turbocharger is used for
the engine to retain efficiency( balanced fuel to air ra-
tio) at altitudes above sea level.
The turbocharger consists of a turbine wheel and a
centrifugal blower,or compressor wheel,separately
encased but mounted on and rotating with a common
shaft.
The power to drive the turbine wheel- which in turn
drives the compressor- is obtained from the energy
of the engine exhaust gases.The rotating speed of
the turbine changes as the energy level of gas chang-
es; therefore,the engine is supplied with enough air to
burn fuel for its load requirements.Fig's.5-9.The tur-
bocharger is lubricated and cooled by engine lubricat-
ing oil.
for every gallon of fuel that it burns.For the engineto
operateeficinly it must breathe freely; intake and
exhaust systems must not be restricted.
The intake air should always be routed through anair
cleaner.The cleaner may be mounted on the engine
or equipment and may be either oil bath,paper elem-
ent or composite type depending upon engine applica-
tion.Air is routed from the air cleaner directly to the in-
take air manifold,or turbocharger.
NTA Aftercooler
An aftercooler (or intercooler as it is sometimes called)
is a device in the engine intake system designed to
reduce intake air temperature and/or preheat intake
air temperature.
The aftercooler consists of a housing,used as a port-
ion of the engine intake air manifold,with an internal
core.The core is made of tubes through which engine
coolant circulates.Air is cooled or heated by passing
over the core prior to going into the engine combust-
ion chambers.Fig.5-8.Therefore,improved combust-
ion results from better control of the intake air temper-
ature cooling or warming as applied by the aftercooler.
Turbocharger
The turbocharger forces additional air into the combu-
stion chambers so the engine can burn more fuel and
develop more horsepower than if it were naturally as-
pirated.In some cases the turbocharger is used forthe engine to retain efficiency( balanced fuel to air ra-
tio) at altitudes above sea level.
The turbocharger consists of a turbine wheel and a
centrifugal blower,or compressor wheel,separately
encased but mounted on and rotating with a common
shaft.
The power to drive the turbine wheel- which in turn
drives the compressor- is obtained from the energy
of the engine exhaust gases.The rotating speed of
the turbine changes as the energy level of gas chang-
es; therefore,the engine is supplied with enough air to
burn fuel for its load requirements.Fig's.5-9.The tur-
bocharger is lubricated and cooled by engine lubricat-
ing oil.
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