A Dynamic Sliding Manifold for Air-fuel Ratio Control in Lean-Burn Spark Ignition Engines

2012 ◽  
Author(s):  
Behrouz Ebrahimi ◽  
Reza Tafreshi ◽  
Javad Mohammadpour ◽  
Houshang Masudi ◽  
Matthew A. Franchek ◽  
...  
Keyword(s):  
Spark Ignition ◽  
Spark Ignition Engines ◽  
Lean Burn ◽  
Fuel Ratio ◽  
Sliding Manifold

In-Cylinder Air Fuel Ratio and Combustion Control for Spark Ignition Engines

1995 ◽  
Author(s):  
Minoru Ohsuga ◽  
Jun'ichi Yamaguchi ◽  
Ryuhei Kawabe ◽  
Masakichi Momono
Keyword(s):  
Spark Ignition ◽  
Spark Ignition Engines ◽  
Combustion Control ◽  
Fuel Ratio

Linear Parameter-Varying Lean Burn Air-Fuel Ratio Control for a Spark Ignition Engine

2007 ◽  
Vol 129 (4) ◽  
pp. 404-414 ◽  
Author(s):  
Feng Zhang ◽  
Karolos M. Grigoriadis ◽  
Matthew A. Franchek ◽  
Imad H. Makki
Keyword(s):  
Time Delay ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Linear Parameter ◽  
Lean Burn ◽  
Linear Parameter Varying ◽  
Variable Time Delay ◽  
Variable Time ◽  
Fuel Ratio ◽  
Parameter Varying

Maximization of the fuel economy of the lean burn spark ignition (SI) engine strongly depends on precise air-fuel ratio control. A great challenge associated with the air-fuel ratio feedback control is the large variable time delay in the exhaust system. In this paper, a systematic development of an air-fuel ratio controller based on post lean NOx trap (LNT) oxygen sensor feedback using linear parameter-varying (LPV) control is presented. Satisfactory stability and disturbance rejection performance is obtained in the face of the variable time delay. The LPV controller is simplified to an explicit parameterized gain scheduled lead-lag controller form for the ease of implementation. A Ford F-150 truck with a V8 4.6 l lean burn engine was used to demonstrate the LPV air-fuel ratio control design. Both simulation and experimental results demonstrate that the designed controller regulates the tailpipe air-fuel ratio to the preset reference for the full engine operating range.

Air-Fuel Ratio Control of Spark Ignition Engines With TWC Using LPV Techniques

2009 ◽  
Author(s):  
Rohit A. Zope ◽  
Javad Mohammadpour ◽  
Karolos M. Grigoriadis ◽  
Matthew Franchek
Keyword(s):  
Design Method ◽  
Spark Ignition ◽  
Operating Conditions ◽  
System Stability ◽  
Linear Matrix ◽  
Pi Control ◽  
Spark Ignition Engines ◽  
Si Engine ◽  
Precise Control ◽  
Fuel Ratio

Precise control of the air-fuel ratio in a spark ignition (SI) engine is important to minimize emissions. The emission reduction strongly depends on the performance of the air-fuel ratio controller for the SI engine in conjunction with the Three Way Catalytic (TWC) converter. The TWC converter acts as a buffer to any variations occurring in the air-fuel ratio. It stores oxygen during a lean operation and releases the stored oxygen during a rich transient phase. The stored oxygen must be maintained close to the current storage capacity to yield maximum benefits from the TWC converter. Traditionally this is achieved using a simple PI control or a gain-scheduled PI control to address the variability in the operating conditions of the engine. This, however, does not guarantee closed-loop system stability and/or performance. In this work a model-based linear parameter varying (LPV) approach is used to design an H∞ controller. The design goal is to minimize the effect of disturbances on the air-fuel ratio and hence the relative storage level of oxygen in the TWC, over a defined operating range for the SI engine. The design method formulated in terms of Linear Matrix Inequalities (LMIs) leads to a convex optimization problem which can be efficiently solved using existing interior-point optimization algorithms. Simulations performed validate the proposed control design methodology.

Inverse adaptive air-fuel ratio control in spark ignition engines

2016 ◽  
Author(s):  
Dmitry N. Gerasimov ◽  
Mikhail E. Belyaev ◽  
Vladimir O. Nikiforov ◽  
Hossein Javaherian ◽  
Shifang Li ◽  
...  
Keyword(s):  
Spark Ignition ◽  
Spark Ignition Engines ◽  
Fuel Ratio
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