Development of a New Mean Value Model for the Analysis of Turbolag Phenomena in Automotive Diesel Engines

2007 ◽  
Author(s):  
M. Pettiti ◽  
L. Pilo ◽  
F. Millo
Keyword(s):  
Diesel Engines ◽  
Mean Value ◽  
Mean Value Model ◽  
Value Model

scholarly journals Actuator Fault Diagnosis with Application to a Diesel Engine Testbed

2015 ◽  
Vol 2015 ◽  
pp. 1-15 ◽  
Author(s):  
Boulaïd Boulkroune ◽  
Abdel Aitouche ◽  
Vincent Cocquempot ◽  
Li Cheng ◽  
Zhijun Peng
Keyword(s):  
Diesel Engines ◽  
Mean Value ◽  
Fault Detection And Isolation ◽  
Actuator Fault ◽  
Unknown Input Observer ◽  
Decision Algorithm ◽  
Variable Geometry Turbocharger ◽  
Mean Value Model ◽  
Value Model ◽  
Gas Recirculation

This work addresses the issues of actuator fault detection and isolation for diesel engines. We are particularly interested in faults affecting the exhaust gas recirculation (EGR) and the variable geometry turbocharger (VGT) actuator valves. A bank of observer-based residuals is designed using a nonlinear mean value model of diesel engines. Each residual on the proposed scheme is based on a nonlinear unknown input observer and designed to be insensitive to only one fault. By using this scheme, each actuator fault can be easily isolated since only one residual goes to zero while the others do not. A decision algorithm based on multi-CUSUM is used. The performances of the proposed approach are shown through a real application to a Caterpillar 3126b engine.

A Control-Oriented Mean-Value Model of HCCI Diesel Engines With External Mixture Formation

2005 ◽  
Author(s):  
Marcello Canova ◽  
Luca Garzarella ◽  
Marco Ghisolfi ◽  
Shawn Midlam-Mohler ◽  
Yann Guezennec ◽  
...  
Keyword(s):  
Diesel Engines ◽  
Combustion Process ◽  
Mean Value ◽  
Ignition Process ◽  
Fuel Injector ◽  
Mixture Formation ◽  
Calculation Algorithm ◽  
Hcci Combustion ◽  
Mean Value Model ◽  
Value Model

Homogeneous Charge Compression Ignition (HCCI) is considered a promising concepts to achieve low NOx and Particulate Matter emissions in traditional Spark Ignition and Diesel engines. However, understanding and controlling the complex mechanisms which govern the combustion process is still extremely difficult. A viable method to obtain HCCI combustion in DI Diesel engines consists of premixing the charge by applying an additional fuel injector in the intake port, thus decoupling the HCCI mixture formation from the traditional in-cylinder injection. The system allows high load operation in DI mode without compromising performance, low to mid-load operation in HCCI mode, and a region in between where both systems operate together. To manage HCCI combustion with external mixture formation it is essential to identify the most important control parameters and understand their influence on the auto-ignition process. The proposed paper deals with the analysis of HCCI combustion with external mixture formation through experimental investigation and a Control-Oriented mean-value model. The model provides the data required by a combustion calculation algorithm to perform a first-law analysis that estimates the in-cylinder heat release and pressure. The tool developed was then validated on data provided by an extensive experimental activity on a 4-cylinder Diesel engine equipped with an external fuel atomizer to operate in HCCI mode.

A Mean-Value Model of a Turbocharged HCCI Diesel Engine with External Mixture Formation

2005 ◽  
Author(s):  
M. Canova ◽  
L. Garzarella ◽  
M. Ghisolfi ◽  
S. Midlam-Mohler ◽  
Y. Guezennec ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Mean Value ◽  
Mixture Formation ◽  
Mean Value Model ◽  
Value Model

The Use of a Mean Value Model to Achieve the Best Efficiency of a Variable Speed Generator Coupled to a Diesel Engine

2012 ◽  
Author(s):  
Augusto F. Pacheco ◽  
Jonas R. Tibola ◽  
Mario E. S. Martins ◽  
Paulo R. M. Machado ◽  
Humberto Pinheiro ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Mean Value ◽  
Variable Speed ◽  
Mean Value Model ◽  
Value Model

scholarly journals A Mean-Value Model for Control of Homogeneous Charge Compression Ignition (HCCI) Engines

2004 ◽  
Vol 127 (3) ◽  
pp. 355-362 ◽  
Author(s):  
D. J. Rausen ◽  
A. G. Stefanopoulou ◽  
J.-M. Kang ◽  
J. A. Eng ◽  
T.-W. Kuo
Keyword(s):  
Mass Flow ◽  
Homogeneous Charge Compression Ignition ◽  
Mean Value ◽  
The State ◽  
State Of Charge ◽  
Inert Gas ◽  
Compression Ignition ◽  
Hcci Engines ◽  
Mean Value Model ◽  
Value Model

A Mean Value Model (MVM) for a Homogeneous Charge Compression Ignition (HCCI) engine is presented. Using a phenomenological zero-dimensional approach with five continuous and three discrete states we first model the effects of the Exhaust Gas Recirculation (EGR) valve, the exhaust Rebreathing Lift (RBL), and the fueling rate on the state of charge in the cylinder at intake valve closing. An Arrhenius integral is then used to model the start of combustion, θsoc. A series of simple algebraic relations that captures the combustion duration and heat release is finally used to model the state of charge after the HCCI combustion and the Location of Peak Pressure (LPP). The model is parametrized and validated using steady-state test data from an experimental gasoline engine at the General Motors Corporation. The simple model captures the temperature, pressure, air-to-fuel ratio, and inert gas fraction of the exhausted mass flow. This characterization is important for the overall HCCI dynamics because the thermodynamic state (pressure, temperature) and concentration (oxygen and inert gas) of the exhausted mass flow affect the next combustion event. The high dilution level in HCCI engines increases the significance of this internal feedback that generally exists to a smaller extent in conventional spark-ignition and compression-ignition internal combustion engines.

Model and Calibration of a Diesel Engine Air Path With an Asymmetric Twin Scroll Turbine

2013 ◽  
Author(s):  
Mike J. Hand ◽  
Erik Hellström ◽  
Doohyun Kim ◽  
Anna Stefanopoulou ◽  
Justin Kollien ◽  
...  
Keyword(s):  
Diesel Engine ◽  
System Analysis ◽  
Flow Characteristics ◽  
Load Condition ◽  
Mean Value ◽  
Complex Flow ◽  
Transient Control ◽  
Mean Value Model ◽  
Value Model ◽  
And Control

A control-oriented model and its associated tuning methodology is presented for the air path of a six cylinder 13 L diesel engine equipped with an asymmetric twin-scroll turbine, wastegate (WG), and exhaust gas recirculation (EGR). This model is validated against experimental engine data and shows good agreement. The small scroll of the asymmetric twin scroll turbine is fed by the exhaust of three cylinders via a split manifold that operates at higher pressure than the exhaust manifold feeding the larger turbine scroll. The asymmetric design with the high exhaust back pressure on three of the six cylinders gives the necessary EGR capability, with reduced pumping work, but leads to complex flow characteristics. The mean-value model describes the flows through the engine, the flow through the two turbine scrolls, the EGR flow, and the WG flow as they are defined, and defines the pressure of the manifolds they connect to. Using seven states that capture the dynamics of the pressure and composition in the manifolds and the speed of the turbo shaft, the model can be used for transient control, along with set point optimization for the EGR and WG flows for each speed and load condition. The relatively low order of the model makes it amenable to fast simulations, system analysis, and control design.

scholarly journals Calibration and Validation of a Mean Value Model for Turbocharged Diesel Engine

2013 ◽  
Vol 5 ◽  
pp. 579503 ◽  
Author(s):  
Ruixue Li ◽  
Ying Huang ◽  
Gang Li ◽  
Kai Han ◽  
He Song
Keyword(s):  
Diesel Engine ◽  
Mean Value ◽  
Turbocharged Diesel Engine ◽  
Calibration And Validation ◽  
Mean Value Model ◽  
Value Model
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