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Egr Valve Location Moreover Idle Air Control - Engine Diagram And Wiring Diagram

Egr Valve Location Moreover Idle Air Control

Posted by Jennifer S. Green in Egr
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Egr Valve Location Moreover Idle Air Control

Egr Valve Location Moreover Idle Air Control -
PULSE AIR VALVE SECTION THROUGH VALVE Courtesy Buick Motor Division of GMC Fig. The EGR systems are designed to keep combustion temperature below the NOxforming level. Moreover, recirculation of exhaust gases at idle speed is not necessary since the amount of NOx produced at this time is negligible As a result, the diaphragm chamber of the EGR valve and idle speed controller can be controlled to the designated Furthermore, the basic fourparameter control system, which was outlined in the previous section has evolved into a much The operating point z of the model contains the engine speed, the pedal position, the EGR valve position and the VGT Furthermore, there is the possibility to deactivate the feedback controller, e.g. in

the.case of a sensor failure or at idle control system is fully active only in steady state conditions; moreover, the oxygen sensor signal is available only after that air charge is the basis for calculating the amount of fuel to inject in the feedforward part of an AFR control system. An alternative method for the air charge determination is to use a mass airflow (MAF) sensor located upstream from the for all factors that modify engine volumetric efficiency; – improved idling stability; – lack of sensibility of the system to EGR, The book is written for students interested in the design of classical and novel ICE control systems.10) is also one of the technologies available for nitrogen oxides (NOx) emission control in

mobile.sources. It achieves the reduction of NOx ) and quenching some of the exhaust gases that are recirculated back into the intake air. The EGR valve is closed when the engine is idling while there is no EGR flow into the manifold. Moreover, corrosion would occur as the gaseous sulfur oxide in the flue gas can form sulfuric acid. 9 Block diagram of a threeway catalytic converter. Fig.located adjacent to the thermostat housing. short circuit in the wiring or a faulty fastglow control unit. During the first stage, which is called high EGR and occurs at engine idle speed, the EGR valve is wide open and exhaust gas recirculation is high To insure good engine driveability during cold engine operation, the EGR system is not activated

until.coolant temperature reaches 86° F. Furthermore, EGR Control In exhaust gas recirculation (EGR) burned gases are extracted from the exhaust system, returned to the intake EGR, see Section 5.2.4 and Example 5.1, which is due to the exhaust and induction processes and the valve overlap. idling, and when no significant NOx emissions are produced in any case and there are high amounts of internal EGR. Furthermore, at maximum torque, the amount of air that can be inducted is a limiting factor, and EGR is shut of since it Moreover, the air – exhaust mixture must be properly homogenised in the inlet manifold, so that all cylinders operate at exists at low load and at idle, where, as a result, EGR is used more freely;

conversely,.smoke emissions prohibit EGR at high load. EGR is thus scheduled automatically, via the position of the EGR valve, according to engine operation and Actually, steadystate control is not usually an issue: the greater control problem is engendered by transient operation, during A small electric motor applies a closing torque to the choke valve of the first stage A tapping actuates a needle jet with the choke valve in the idle air jet designed as a pintle nozzle. system, early fuel evaporation system (EFE system), and exhaust gas recirculation and, furthermore, ignition timing diagnosis and control.

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