NDLI: Dynamic Reference Value Generation for the Control of a Diesel Engine With HP- and LP-EGR

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Mrosek, Matthias Isermann, Rolf
Copyright Year	2010
Abstract	A combination of a low-pressure EGR and a high-pressure EGR for Diesel engines can effectively reduce the NOx emissions. In comparison to a conventional high-pressure EGR, the combination with a low-pressure EGR introduces an additional degree of freedom for the air path control. From control perspective the weaker couplings with the charging pressure and the dynamics of the gas composition in the intake and exhaust system are the major differences between the low-pressure and the high-pressure EGR. The lower gas temperature of the low-pressure EGR further reduces the emissions. A control oriented model is presented to control the gas composition in the intake system. Therefore a reference value transformation converts a desired air mass flow rate into a desired gas composition in the intake system. Depending on the dynamical gas compositions in the intake and exhaust system, the reference value of the desired gas composition results in a setpoint for a high-pressure EGR mass flow rate controller. Due to the faster dynamics of the high-pressure EGR, this controller accounts for the fast dynamical effects in the gas system. The presented control structure in combination with the reference value generation is invariant to model and sensor uncertainties and results stationary in an air mass flow rate control. As additional control variable, the intake temperature is controlled by the low-pressure EGR mass flow rate. A calibrated desired temperature delivers the setpoint for a low-pressure EGR mass flow rate controller.
Sponsorship	Dynamic Systems and Control Division
Starting Page	109
Ending Page	116
Page Count	8
File Format	PDF
ISBN	9780791844175
DOI	10.1115/DSCC2010-4154
e-ISBN	9780791838846
Volume Number	ASME 2010 Dynamic Systems and Control Conference, Volume 1
Conference Proceedings	ASME 2010 Dynamic Systems and Control Conference
Language	English
Publisher Date	2010-09-12
Publisher Place	Cambridge, Massachusetts, USA
Access Restriction	Subscribed
Subject Keyword	Temperature Degrees of freedom Uncertainty Control equipment Pressure Flow (dynamics) Emissions Exhaust systems Couplings High pressure (physics) Exhaust gas recirculation Diesel engines Dynamics (mechanics) Nitrogen oxides Sensors
Content Type	Text
Resource Type	Article

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