Electrical and Optical Characterization Methodologies for Advanced Spark Ignition

2022 ◽  
pp. 1-35
Author(s):  
Linyan Wang ◽  
Guangyun Chen ◽  
Jimi Tjong ◽  
Ming Zheng
Keyword(s):  
Spark Ignition ◽  
Combustion Engines ◽  
Flow Conditions ◽  
Current Management ◽  
Task Control ◽  
Density Flow ◽  
Efficient Combustion ◽  
Spark Plasma ◽  
Aviation Engines ◽  
A Current

Abstract Due to the high transiency and high voltage characteristics of spark ignition, precise measurements are in demand for efficient ignition in future clean combustion engines. The practical challenges of SI systems arise as the gaseous substances vary extensively in density, flow, and temperature. In this paper, a typical transistor coil ignition system with a current management module maintains the transient discharge condition for more credible measurements. Suitable apparatus with FPGA multi-task control systems are established to effectively control and stabilize the discharge current level and duration. The electrical waveforms and spark plasma patterns are correlated, via concurrent electric probing and shadowgraph imaging, under quiescent and flow conditions. The multi-task FPGA provides synchronization of ignition control and data acquisition. The empirical setup and analyzing methods of this work provide essential guidance for facilitating broader innovations in spark ignition, and for advancing the clean and efficient combustion in automotive and aviation engines.

Discharge Characteristics of Current Boosted Spark Events Under Flow Conditions

2017 ◽  
Author(s):  
Xiao Yu ◽  
Zhenyi Yang ◽  
Shui Yu ◽  
Mark Ives ◽  
Ming Zheng
Keyword(s):  
Flow Velocity ◽  
Discharge Current ◽  
Gas Flow ◽  
Spark Ignition ◽  
Current Level ◽  
Flow Conditions ◽  
Kernel Development ◽  
Flame Kernel ◽  
Spark Plasma ◽  
Gas Flow Velocity

With the advancement of spark ignition engines, lean or diluted in-cylinder charge is often used to improve the engine performance. Enhanced in-cylinder charge motion is widely applied under such conditions to promote the flame propagation, which raise challenges for the spark ignition system. In this work, the spark discharging process is investigated under different flow conditions via both optical diagnosis and electrical measurement. Results show that the spark plasma channel is stretched under flow conditions. A higher discharge current can maintain the stretched spark plasma for a longer duration. Re-strikes are observed when the spark plasma is stretched to a certain extent. The frequency of re-strikes increases with increased flow velocity and decreased discharge current level. The discharge duration reduces with the increased flow velocity. The effects of gas flow on the ignition and flame kernel development are studied in a constant volume optical combustion chamber with premixed lean and stoichiometric methane air mixture. Two spark strategies with low and high discharge current are used for the ignition. The flame propagation speed of both lean and stoichiometric mixtures increases with the increased gas flow velocity. A higher discharge current level retains a more stable spark channel and improves the flame kernel development for both lean and stoichiometric conditions, especially under the higher gas flow velocity of 20 m/s.

The Use of Short-Term Compressed Air Supercharging in a Combustion Engine with Spark Ignition

2021 ◽  
Vol 18 (2) ◽  
pp. 8704-8713
Author(s):  
Jarosław Janusz Mamala ◽  
K. Praznowski ◽  
S. Kołodziej ◽  
G. Ligus
Keyword(s):  
Driving Force ◽  
Negative Impact ◽  
Combustion Engine ◽  
Spark Ignition ◽  
Compressed Air ◽  
Acceleration Process ◽  
Combustion Engines ◽  
Short Term ◽  
Drive Unit ◽  
The People

The powertrain is a very important subassembly in a car and is responsible not only for the automotive industry’s impact on the environment but also for the safety of people travelling by car and performing overtaking manoeuvres and joining traffic. In general, the powertrain is a combination of the drive unit and drive transmission, wherein the drive unit is responsible for the available driving force in the car’s wheels and for the car’s ability to accelerate when the throttle pedal is rapidly pressed at a constant gearbox ratio. The availability of the driving force reserve in the powertrain is the most important issue for the reason of safety of the people travelling by car. In the case of drive unit what they are of the combustion engines, the rapid pressing of the throttle pedal in the car acceleration process leads to a temporary deficiency in the driving force and in the powertrain’s output. The deficiency in the driving force has a negative impact on acceleration and driving comfort. In this paper, the authors assessed and analysed two different short-term compressed air supercharging systems for combustion engines with air supplied from a high-pressure tank. The analysis covered the response of the combustion engine with spark ignition to the gradual increase in pressure in the air-intake system. The assumption is that the applied short-term compressed air supercharging system could improve the driving force during the phase of the engine’s increasing crankshaft rotational speed. This helps to achieve the improved passenger car acceleration dynamics, depending on the supercharging method and throttle pedal exertion. When analysing the car’s acceleration dynamics, expressed by the shorter time of increasing the longitudinal speed from initial to final, it was possible to shorten the acceleration time. It is also possible to observe an improved driving force behaviour, especially during the first phase of acceleration.

scholarly journals Analysis of thermodynamic parameters in spark ignition VCR engine

2019 ◽  
Vol 294 ◽  
pp. 05001
Author(s):  
Patryk Urbański ◽  
Maciej Bajerlein ◽  
Jerzy Merkisz ◽  
Andrzej Ziółkowski ◽  
Dawid Gallas
Keyword(s):  
Thermodynamic Parameters ◽  
Motion Analysis ◽  
Internal Combustion Engines ◽  
Initial Conditions ◽  
Combustion Process ◽  
Internal Combustion ◽  
3D Models ◽  
Spark Ignition ◽  
Combustion Engines ◽  
Combustion Processes

3D models of Szymkowiak and conventional engines were created in the Solidworks program. During the motion analysis, the characteristics of the piston path were analyzed for the two considered engine units. The imported file with the generated piston routes was used in the AVL Fire program, which simulated combustion processes in the two engines with identical initial conditions. The configurations for two different compression ratios were taken into account. The basic thermodynamic parameters occurring during the combustion process in internal combustion engines were analyzed.

Spark Plasma in Different Gas Media Under Flow Conditions

2020 ◽  
Vol 48 (1) ◽  
pp. 104-108
Author(s):  
Zhenyi Yang ◽  
Hua Zhu ◽  
Xiao Yu ◽  
Ming Zheng ◽  
David S-K Ting
Keyword(s):  
Flow Conditions ◽  
Spark Plasma

Thermophysical Properties of Working Substance and Heat Transfer in a Hydrogen Combustion Engine

2003 ◽  
Author(s):  
T. Shudo ◽  
H. Oka
Keyword(s):  
Heat Transfer ◽  
Combustion Chamber ◽  
Heat Loss ◽  
Thermophysical Properties ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Spark Ignition ◽  
Hydrogen Combustion ◽  
Spark Ignition Engine ◽  
Combustion Engines

Hydrogen is a clean alternative to fossil fuels for internal combustion engines and can be easily used in spark-ignition engines. However, the characteristics of the engines fueled with hydrogen are largely different from those with conventional hydrocarbon fuels. A higher burning velocity and a shorter quenching distance for hydrogen as compared with hydrocarbons bring a higher degree of constant volume and a larger heat transfer from the burning gas to the combustion chamber wall of the engines. Because of the large heat loss, the thermal efficiency of an engine fueled with hydrogen is sometimes lower than that with hydrocarbons. Therefore, the analysis and the reduction of the heat loss are crucial for the efficient utilization of hydrogen in internal combustion engines. The empirical correlations to describe the total heat transferred from the burning gas to the combustion chamber walls are often used to calculate the heat loss in internal combustion engines. However, the previous research by one of the authors has shown that the widely used heat transfer correlations cannot be properly applied to the hydrogen combustion even with adjusting the constants in them. For this background, this research analyzes the relationship between characteristics of thermophysical properties of working substance and heat transfer to the wall in a spark-ignition engine fueled with hydrogen.

Development of the Control and Acquisition System for a Natural-Gas Spark-Ignition Engine Test Bench

2019 ◽  
Author(s):  
Lorenzo Gasbarro ◽  
Jinlong Liu ◽  
Christopher Ulishney ◽  
Cosmin E. Dumitrescu ◽  
Luca Ambrogi ◽  
...  
Keyword(s):  
Natural Gas ◽  
Internal Combustion Engines ◽  
Test Bench ◽  
Spark Ignition ◽  
Operating Conditions ◽  
Spark Ignition Engine ◽  
Acquisition System ◽  
Combustion Engines ◽  
Engine Test ◽  
New Sensors

Abstract Investigations using laboratory test benches are the most common way to find the technological solutions that will increase the efficiency of internal combustion engines and curtail their emissions. In addition, the collected experimental data are used by the CFD community to develop engine models that reduce the time-to-market. This paper describes the steps made to increase the reliability of engine experiments performed in a heavy-duty natural-gas spark-ignition engine test-cell such as the design of the control and data acquisition system based on Modbus TCP communication protocol. Specifically, new sensors and a new dynamometer controller were installed. The operation of the improved test bench was investigated at several operating conditions, with data obtained at both high- and low-sampling rates. The results indicated a stable test bench operation.

Analysis of the Feasibility of Usage of Standalone Controllers for Control of Spark-Ignition Engines

2016 ◽  
Vol 817 ◽  
pp. 245-252
Author(s):  
Sławomir Wierzbicki ◽  
Wojciech Kraskowski ◽  
Bronisław Kolator
Keyword(s):  
Control System ◽  
Engine Performance ◽  
Spark Ignition ◽  
Control Algorithms ◽  
Electronic Systems ◽  
Combustion Engines ◽  
Spark Ignition Engines ◽  
Performance Parameters ◽  
Engine Control System ◽  
Toxic Fumes

Modern combustion engines have developed into technologically advanced units that are controlled by complex electronic systems. The controllers of these systems are equipped with built-in control algorithms which allow the engine to achieve optimum engine performance parameters, in compliance with the strict requirements of standards related to the release of toxic fumes to the atmosphere. Unfortunately, this type of engine control system very often makes it difficult to carry out research, or even prevents it, because the change of engine's regulatory parameters is not possible. Currently in most cases research carried out on this type of engine requires the construction of special controllers that allow the user to interfere with the performance of the control system. This article presents the results of tests carried out on an ignition-type engine controlled by a standalone engine.

Sign in / Sign up

Export Citation Format

Share Document