TECHNICALANDCONSUMERINFORMATION
Togetthemostfromanengine—intheway
ofperformance,smoothdriveability,economy
andcontrolofharmfulemissions—anumber
of decisive factors must be controlled as
preciselyaspossibleunderalldrivingcondi-
tions.These‘‘factors’’includethefollowing:
The engine in your INFINITI has degrees of
eitherthroughautomaticdevicesprovidedfor
idle control or in response to your foot
pressureonthevehiclethrottle.
precision in the automatic control of these
factors that, only a few years ago, were not
thought possible by any known technology.
Suchahighperformanceenginemustoperate
smoothly and efficiently at all speed. And it
mustdosowithaminimumoffuelconsump-
tion and a minimum of emissions into the
environment.
All of the atmospheric air that is drawn into
the engine is measured by a mass air flow
sensor.
●
●
●
The timing and overlap of the intake and
exhaustvalvesinrelationtothepositionof
thepistonsintheengine.
Thistypeofmassairflowsensorcanrespond
veryquicklytochangesinintakeairquantity
anddensity,whichmeansasyousteponthe
throttleofyourINFINITItomoveintofreeway
traffic, a voltage signal is sent to the ECM
(engine control module) instantly, and the
ECMrespondsjustasquicklytoprovidemore
fuelbyallowingtheportfuelinjectorstostay
open precise milliseconds longer. The result
is smooth acceleration, without ‘‘stumble’’ or
‘‘hesitation’’.
MIXTURECONTROL
Themixtureofairandfuelthatentersthe
enginecylindersduringeachintakestroke
ofthepistons.
Agasolineenginerequiresarelatively‘‘rich’’
mixture of fuel to air during idle, a ‘‘lean’’
mixture for mid-range and ‘‘cruise’’ condi-
tions, and a ‘‘richer’’ mixture for high load,
highRPMoperation.Thechangesinamount
of fuel delivered to the engine must occur
smoothly, sometimes in response to sudden
changes in demand from the driver. The
INFINITIECCScangivetheengineprecisely
theamountoffuelrequiredforeachcondition,
according to a precise measurement of the
amountofairthatisallowedintotheengine
The timing of the spark that ignites the
pressurizedchargeofairandfuelnearthe
end of the compression stroke of the
pistons.
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●
The temperature of the combustion that
occurs in the cylinders, especially under
load.
Engineidlespeedunderallconditions.
10-4
| Categories | Infiniti Manuals, Infiniti QX Manuals |
|---|---|
| Document Type | Free Auto PDF Owners Manual Download |
| Tags | Infiniti QX4 3.3 |
| Model Year | 1998 |
| Download File |
|
| Document File Type | |
| Publisher | infiniti.com |
| Wikipedia's Page | Infiniti QX4 |
| Copyright | Attribution Non-commercial |
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Was looking for a way to disable the passenger airbag so I could have my dog beside me while traveling but it does not seem possible.