scholarly journals The Potential of Using the Ion-Current Signal for Optimizing Engine Stability - Comparisons of Lean and EGR (Stoichiometric) Operation

2003 ◽  
Author(s):  
Patrik Einewall ◽  
Per Tunestål ◽  
Bengt Johansson
Keyword(s):  
Ion Current ◽  
Current Signal ◽  
Engine Stability

Knock and Pre-Ignition Detection Using Ion Current Signal on a Boosted Gasoline Engine

2017 ◽  
Author(s):  
Sunyu Tong ◽  
Zhaohui Yang ◽  
Xiaoyu He ◽  
Jun Deng ◽  
Zhijun Wu ◽  
...  
Keyword(s):  
Gasoline Engine ◽  
Ion Current ◽  
Current Signal

Ion Current Measurements as a Method for the Detection of the Reaction Rate in Combustion With Swirl Stabilized Airblast Injection Systems

2015 ◽  
Author(s):  
J. Christopher Wollgarten ◽  
Nikolaos Zarzalis ◽  
Fabio Turrini ◽  
Antonio Peschiulli
Keyword(s):  
Reaction Rate ◽  
Strong Dependence ◽  
Sampling Rate ◽  
Stability Control ◽  
Ion Current ◽  
Ion Concentration ◽  
Injection System ◽  
Current Signal ◽  
Recirculating Flow ◽  
Lean Combustion

Due to strict emission legislation, the trend in the development of aero-engine gas turbine combustion is heading towards lean burning approaches. Lean combustion reduces the combustion temperatures and therefore also the nitrogen oxides emissions. Unfortunately, lean combustion suffers from instabilities and the operation close to the point of lean blowout increases the risk of imminent blowoff. Active stability control is therefore inevitable. The objective of this work is to evaluate the signal obtained from an ion current measurement technique to enable combustion control for aircraft propulsion applications in the near future. In the past ion current measurements have been used in several studies as flame turbulence analyzer and to detect the reaction rate. However, investigations in lean burning and swirl stabilized airblast injection combustors for future propulsion concepts are rare. The signal obtained from an ion current detector inside a combustor depends strongly on the measurement position. In this experimental investigation field measurements at atmospheric conditions of the ion concentration in a tubular combustor with a sampling rate of 8 kHz are compared with 4 kHz time resolved temperature and OH* chemiluminescence measurements in order to determine the position of the reaction inside the combustor. Variations were performed of the air to fuel ratio (AFR), the air preheating temperature and the pressure drop across the injection system to clarify the interpretation of the ion current signal. The results indicate a strong dependence of the ion current signal on the AFR and that the technique has distinct advantages compared to OH* chemiluminescence measurements: The measurement equipment is comparable non-expensive and the results reveal that the reaction rate is measured directly and are not interpreted from a 3D image. A transition in flame shape from a compact to a tornado flame can be clearly identified with the applied probe. Furthermore, regions with high temperature fluctuations do not necessarily reveal the reaction zone in a recirculating flow field.

scholarly journals Investigation of Correlation Between Ion Current Signal and NOX Emissions in Controlled Auto-ignition Engine

2015 ◽  
Vol 66 ◽  
pp. 85-88
Author(s):  
Yintong Liu ◽  
Liguang Li ◽  
Junyu Ye ◽  
Zhijun Wu ◽  
Jun Deng
Keyword(s):  
Ion Current ◽  
Nox Emissions ◽  
Current Signal ◽  
Auto Ignition

Identification of combustion and detonation in spark ignition engines using ion current signal

Fuel ◽  
2018 ◽  
Vol 227 ◽  
pp. 469-477 ◽  
Author(s):  
Armando A.M. Laganá ◽  
Leonardo L. Lima ◽  
João F. Justo ◽  
Benedito A. Arruda ◽  
Max M.D. Santos
Keyword(s):  
Spark Ignition ◽  
Ion Current ◽  
Spark Ignition Engines ◽  
Current Signal

Analysis and Research on the Influence Factors of the Spark Plug Ion Current in Spark Ignition Engine

2014 ◽  
Vol 1070-1072 ◽  
pp. 1831-1834
Author(s):  
Chang Qing Song ◽  
Jun Li ◽  
Da Wei Qu
Keyword(s):  
Bias Voltage ◽  
Combustion Process ◽  
Influence Factors ◽  
Spark Ignition Engine ◽  
Ion Current ◽  
Current Signal ◽  
Gas Plasma ◽  
Spark Plug ◽  
Engine Combustion ◽  
Analysis System

The spark plug ion current signal carries abundant information about the engine combustion process. Real-time acquisition of the spark plug ion current signal can effectively extract the characteristic parameters, then enhance the power, fuel economy and emissions of the engine. The paper analyzed the influence factors of ion current, designed an acquisition and analysis system of spark plug ion current signal, and mainly studied the influence of spark plug gap and bias voltage on ion current signal in a six-cylinder four-stroke gas engine. The results show that the bias voltage and the spark plug gap have a great impact on the spark plug ion current signal. The ion current signal intensity is directly proportional to the bias voltage applied cross the spark plug, and inversely proportional to the spark plug gap. Results also indicates that the ion current is directly proportional to the mobility and concentration of charged particles in burned gas plasma.

Electro-responsive asymmetric nanopores in polyimide with stable ion-current signal

2003 ◽  
Vol 76 (5) ◽  
pp. 781-785 ◽  
Author(s):  
Z. Siwy ◽  
D. Dobrev ◽  
R. Neumann ◽  
C. Trautmann ◽  
K. Voss
Keyword(s):  
Ion Current ◽  
Current Signal

Modeling of Ion Current Signal in Diesel Combustion

2013 ◽  
Author(s):  
Fadi Estefanous
Keyword(s):  
Internal Combustion Engines ◽  
Combustion Process ◽  
Operating Conditions ◽  
Ion Current ◽  
Ionization Mechanism ◽  
Diesel Combustion ◽  
Current Signal ◽  
Three Dimensional Model ◽  
Cycle Simulation ◽  
Soot Precursors

Ionization in internal combustion engines produces a signal indicative of in-cylinder conditions that can be used for the feedback electronic control of the engine, to meet production goals in performance, fuel economy and emissions. Most of the research has been conducted on carbureted and port injection spark ignition engines where the ionization mechanisms are well defined. A limited number of investigations have been conducted on ionization in diesel engines because of its complex combustion process. In this study, a detailed ionization mechanism is developed and introduced in a 3-D diesel cycle simulation computational fluid dynamics (CFD) code to determine the contribution of different species in the ionization process at different engine operating conditions. The CFD code is coupled with DARS-CFD, another module used to allow chemical kinetics calculations. The three-dimensional model accounts for the heterogeneity of the charge and the resulting variations in the combustion products. Furthermore, the model shows the effects of varying fuel injection pressure and engine load on the ion current signal characteristics. Ion current traces obtained experimentally from a heavy duty diesel engine were compared to the 3-D model results. The results of the simulation indicate that some heavy hydrocarbons, soot precursors play a major role, in addition to the role of NOx in ionization in diesel combustion.

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