A Continuous Discharge Ignition System for EGR Limit Extension in SI Engines

2011 ◽  
Vol 4 (1) ◽  
pp. 677-692 ◽  
Author(s):  
Terrence Alger ◽  
Jess Gingrich ◽  
Barrett Mangold ◽  
Charles Roberts
Keyword(s):  
Ignition System ◽  
Discharge Ignition ◽  
Si Engines ◽  
Continuous Discharge

A High-Energy Continuous Discharge Ignition System for Dilute Engine Applications

2013 ◽  
Author(s):  
Terrence Alger ◽  
Jess Gingrich ◽  
Charles Roberts ◽  
Barrett Mangold ◽  
Mark Sellnau
Keyword(s):  
High Energy ◽  
Ignition System ◽  
Discharge Ignition ◽  
Continuous Discharge

Modeling the Effects of the Ignition System on the CCV of Ultra-Lean SI Engines using a CFD RANS Approach

2021 ◽  
Author(s):  
Lorenzo Sforza ◽  
Tommaso Lucchini ◽  
Gianluca Montenegro ◽  
Cagdas Aksu ◽  
Taisuke Shiraishi
Keyword(s):  
Ignition System ◽  
Si Engines

Validation of a Directed Energy Ignition System on a Large-Bore Single Cylinder Gas-Fueled Engine

2020 ◽  
Author(s):  
Forrest Pommier ◽  
David Lepley ◽  
Greg Beshouri ◽  
Timothy Jacobs
Keyword(s):  
Natural Gas ◽  
Combustion Process ◽  
Engine Performance ◽  
Engine Operation ◽  
Capacitive Discharge ◽  
Ignition System ◽  
Single Cylinder ◽  
Spark Plug ◽  
Discharge Ignition ◽  
Directed Energy

Abstract The natural gas industry has seen a considerable increase in production recently as the world seeks out new sources of economical, reliable, and more environmentally friendly energy. Moving this natural gas requires a complex network of pipelines and compressors, including reciprocating engines, to keep the gas moving. Many of these engines were designed more than 40 years ago and must be retrofit with modern technologies to improve their performance while simultaneously reducing the harmful emissions that they produce. In this study a directed energy ignition system is tested on a two-stroke, single cylinder, natural gas-fired engine. Stability and emissions will be observed throughout a range of spark waveforms for a single speed and load that enables the most fuel-lean operation of the engine. Improving the combustion process of the legacy pipeline engines is a substantial area of opportunity for reducing emissions output. One means of doing so is by improving an engines ability to operate at leaner conditions. To accomplish this, an ignition system needs to be able to send more energy to the spark plug in a controlled manner than a tradition capacitive-discharge ignition system. Controlling the energy is accomplished by optimizing the structure of the waveform or “profile” for each engine design. With this particular directed energy ignition system, spark profiles are able to be configured by changing the duration and amount of current sent to the spark plug. This study investigates a single operating speed and load for 9 different spark energy configurations. Engine operation at these test conditions will allow for emissions and engine performance data, using directed energy, to be analyzed in contrast to capacitive-discharge ignition.

Analysis of the Combustion Process of SI Engines Equipped with Non-Conventional Ignition System Architecture

2020 ◽  
Author(s):  
Paolo Sementa ◽  
Francesco Catapano ◽  
SILVANA Di Iorio ◽  
Michele Todino ◽  
Bianca Maria Vaglieco
Keyword(s):  
System Architecture ◽  
Combustion Process ◽  
Ignition System ◽  
Si Engines

Development of Advanced Laser Ignition System for Stationary Natural Gas Reciprocating Engines

2005 ◽  
Author(s):  
Bipin Bihari ◽  
Sreenath B. Gupta ◽  
Raj R. Sekar ◽  
Jess Gingrich ◽  
Jack Smith
Keyword(s):  
Natural Gas ◽  
Operating Conditions ◽  
Combustion Stability ◽  
Laser Ignition ◽  
Nox Emissions ◽  
Ignition System ◽  
Performance Improvements ◽  
Discharge Ignition ◽  
Reciprocating Engines ◽  
Load Conditions

Laser ignition is considered the prime alternative to conventional coil based ignition for improving efficiency and simultaneously reducing NOx emissions in lean-burn natural gas fired stationary reciprocating engines. In this paper, Argonne’s efforts towards the development of a viable laser ignition system are presented. The relative merits of various implementation strategies for laser based ignition are discussed. Finally, the performance improvements required for some of the components for successful field implementation are listed. Also reported are efforts to determine the relative merit of laser ignition over conventional Capacitance Discharge Ignition (CDI) ignition. Emissions and performance data of a large-bore single cylinder research engine are compared while running with laser ignition and the industry standard CDI system. It was primarily noticed that NOx emissions reduce by 50% under full load conditions with up to 65% reductions noticed under part load conditions. Also, the lean ignition limit was significantly extended and laser ignition improved combustion stability under all operating conditions. Other noticeable differences in combustion characteristics are also presented. Efforts wherein ignition was achieved while transmitting the high-power laser pulses through optical fibers showed performance improvements similar those achieved by using free-space laser ignition.

scholarly journals Design of CDI (Capasitive Discharge Ignition) and Motor Spark Plugs Test Kits

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Alamur Rosidil Wafa ◽  
Akhmad Ahfas
Keyword(s):  
Electric Current ◽  
Good Condition ◽  
Ferromagnetic Material ◽  
Electronic System ◽  
Electrical System ◽  
Ignition System ◽  
Rotation Sensor ◽  
Spark Plug ◽  
Discharge Ignition ◽  
Main Components

The Ignition on a motorcycle is an electrical system that produces sparks in the combustion chamber. If there is a mass of ferromagnetic material moving closer to the sensor, then the pulser will generate an electric current. Greater the electric current it generates. With the working principle of such a pulser, it can be used as a rotation sensor and sent to the ignition coil to produce a higher voltage which will produce sparks at the end of the spark plug electrode. The perfection of the system affects the motor work system. A good CDI condition will make it easier to increase the RPM (Rotations Per Minute) and when the spark plugs are in good condition, the motorbike's performance is getting optimal. There can be a useful tool for analyzing the damage to the CDI and the spark on the spark plug by integrating the electronic system in the motor ignition system. An electronic circuit that connects the motorcycle's ignition system through the output of the pulser circuit signal, which triggers the CDI input instead of the pulse magnet. Because the CDI and motor spark plugs are one of the main components that play an important role in the performance of the combustion motor. So that the electrical system can work without using mechanics and can be used as a tool to be able to analyze CDI damage and motor spark plug performance because CDI and spark plugs are some of the main components that play an important role in combustion motor performance. The result is that the tool can test CDI and motor spark plugs efficiently after which it can conclude the damage and can distinguish the characteristics of the CDI and the motor plugs.

scholarly journals The Influence of Charge Motion on Pre-Chamber and Main Chamber Combustion in a Highly Dilute Jet Ignition Engine

2021 ◽  
Vol 6 ◽  
Author(s):  
Michael Bunce ◽  
Alasdair Cairns ◽  
Sai Krishna Pothuraju Subramanyam ◽  
Nathan Peters ◽  
Hugh Blaxill
Keyword(s):  
Thermal Efficiency ◽  
Internal Combustion Engines ◽  
System Optimization ◽  
Combustion Stability ◽  
Main Chamber ◽  
Charge Motion ◽  
Ignition System ◽  
Lean Combustion ◽  
Si Engines ◽  
The Impact

Though there are multiple viable powertrain options available for the automotive sector, those that contain internal combustion engines will continue to account for the majority of global sales for the next several decades. It is therefore imperative to continue the pursuit of novel combustion concepts that produce efficiency levels significantly higher than those of current engines. Introducing high levels of dilution in spark ignited (SI) engines has consistently proven to produce an efficiency benefit compared to conventional stoichiometric engine operation. However, this combustion mode can present challenges for the ignition system. Pre-chamber jet ignition enables stable, highly dilute combustion by both increasing the ignition energy present in the system and distributing it throughout the combustion chamber. Previous work by the authors have shown that jet ignition produces 15–25% increases in thermal efficiency over baseline SI engines with only relatively minor changes to engine architecture. Lean combustion in general and jet ignition in particular represent fundamentally different engine operating modes compared to those of conventional stoichiometric SI engines. Therefore, there are some system sensitivities not present in stoichiometric engines that must be investigated in order to fully optimize the jet ignition system. Differing types and magnitudes of charge motion are incorporated in SI engines to aid with mixture preparation but the influence of charge motion over lean combustion performance, particularly in jet ignition engines, is less well understood. This study analyzes the impact that charge motion has on both pre-chamber and main chamber combustion. A 1.5 L 3-cylinder gasoline engine is outfitted with multiple intake port configurations producing varying magnitudes and types of charge motion. Pre-chamber and main chamber combustion stability and other burn parameter responses are analyzed across multiple speeds and loads, including at critical operating points such as a catalyst heating condition. The results show that there is combustion sensitivity to charge motion, resulting in >1 percentage point spread in peak thermal efficiency for the configurations tested, and that this sensitivity manifests most significantly under low ignitability conditions such as heavy dilution. These results provide guidance for future system optimization of jet ignition engines.

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