Showing papers on "Spark (mathematics) published in 2005"

Air charge estimation in turbocharged spark ignition engines

Abstract: Turbocharged (TC) spark-ignited (SI) engines are popular as they combine high power output with good fuel economy. Furthermore, their emissions can be successfully reduced using a three way catalys ...

Optical diagnostics integrated with laser spark delivery system

Abstract: A spark delivery system for generating a spark using a laser beam is provided, and includes a laser light source and a laser delivery assembly. The laser delivery assembly includes a hollow fiber and a launch assembly comprising launch focusing optics to input the laser beam in the hollow fiber. The laser delivery assembly further includes exit focusing optics that demagnify an exit beam of laser light from the hollow fiber, thereby increasing the intensity of the laser beam and creating a spark. Other embodiments use a fiber laser to generate a spark. Embodiments of the present invention may be used to create a spark in an engine. Yet other embodiments include collecting light from the spark or a flame resulting from the spark and conveying the light for diagnostics. Methods of using the spark delivery systems and diagnostic systems are provided.

Fiber laser coupled optical spark delivery system

Abstract: A spark delivery system for generating a spark using a laser beam is provided, and includes a laser light source and a laser delivery assembly. The laser delivery assembly includes a hollow fiber and a launch assembly comprising launch focusing optics to input the laser beam in the hollow fiber. The laser delivery assembly further includes exit focusing optics that demagnify an exit beam of laser light from the hollow fiber, thereby increasing the intensity of the laser beam and creating a spark. Other embodiments use a fiber laser to generate a spark. Embodiments of the present invention may be used to create a spark in an engine. Yet other embodiments include collecting light from the spark or a flame resulting from the spark and conveying the light for diagnostics. Methods of using the spark delivery systems and diagnostic systems are provided.

Spark ignition modifier module and method

Abstract: A multi-part module including a flame cone and a connector adapted to be interposed between the normal spark plug port in an internal combustion engine block and a spark plug suitable for use with the engine in question. In the method, a quantity of fuel/air mixture is captured in a chamber which also houses the electrode of a spark plug. Upon generation of a spark from the spark plug, this quantity of fuel/air mixture ignites, generating a flame which propagates through one or more channels in a flame cone interposed between the spark plug and the cylinder of the engine and exits into the cylinder through multiple directionally oriented ports, whereupon the flame fronts rapidly ignite substantially all the fuel/air mixture held within the cylinder.

DSP-based engine knock detection including knock sensor and circuit diagnostics

Abstract: A knock detection system for a spark-ignition engine includes a knock sensor that is responsive to vibration of the engine and that generates a knock signal. A first module calculates a knock energy based on the knock signal and a second module calculates a knock intensity based on the knock energy. A third module regulates a spark timing of the engine based on the knock intensity.

Spark ignition device and internal combustion engine with the same

Abstract: A plurality of spark electrodes are disposed in an arc shape on the surface or so as to be projected from the surface of an insulating member formed on a part of the wall face of a combustion chamber, and are formed so as to be in series electrically via discharging gaps. A spark plug is provided integrally with an injector, and the spark plug and the ignition coil are integrated. The three members are constructed as an integral unit, thereby improving installability to an engine.

A level set based flamelet model for the prediction of combustion in spark ignition engines

Abstract: A Flamelet Model based on the Level Set approach for turbulent premixed combustion is presented. The original model [11, 12] is enhanced in order to consistently model the evolution of the premixed flame from laminar into a fully developed turbulent flame. This is accomplished by establishing a linear relationship between the thickness of the turbulent flame brush and the turbulent burning velocity. Starting from there a model for the initial flame propagation of a spherical spark kernel immediately after ignition and for the flame propagation in 3D space is derived. In contrast to other models, the same physical modeling assumptions are employed for the phase initially after spark ignition and for the later phases of flame propagation. The model is applied to a test case in an homogeneous charge Spark Ignition (SI) engine.

Spark - A generic simulator for physical multi-agent simulations.

Abstract: In this paper we describe a new multi-agent simulation system, called Spark, for physical agents in three-dimensional environments. Our goal in creating Spark was to provide a great amount of flexibility for creating new types of agents and simulations. To achieve this, we implemented a flexible application framework and exhausted the idea of replaceable components in the resulting system. In comparison to specialized simulators, users can effortlessly create new simulations by using a scene description language. Spark is a powerful and flexible tool to state different multi-agent research questions. It is used as official simulator for the first three-dimensional RoboCup Simulation League competition. We present the concepts we used to achieve the flexibility in our system and show how we seamlessly integrated the different subsystems into one user-friendly framework.

Detecting spark in igniter of gas turbine engine by detecting signals in grounded shielding

Abstract: A system for detecting spark in an igniter for a gas turbine engine. An igniter generates a plasma, or spark, somewhat similar to an automotive spark plug. In the invention, an inductive pick-up is positioned adjacent the igniter, to detect current pulses in the igniter, to thereby infer the presence of spark. The Inventors have found that this approach is effective, despite the fact that the inductor is surrounded by grounded shielding intended to suppress rf interference, and to protect personnel from high voltages present. The shielding is intended to block the very signals which the invention detects.

Combustion-powered, fastener-driving tool generating sparks in succession when triggered

Abstract: A combustion-powered, fastener-driving tool includes a cylinder and a combustion chamber disposed on top of the cylinder that accommodates a gaseous mixture of existing air in the combustion chamber and fuel injected therein. A spark plug generates a spark to combust the gaseous mixture in the combustion chamber. A trigger produces the spark in the spark plug when operated. A piston is movably supported in the cylinder and driven by combustion in the combustion chamber. A driving blade is coupled to the piston for driving a fastener. A spark controller is provided for generating a plurality of sparks in succession with the spark plug.

Computationally efficient filtering algorithms for engine torque estimation

Abstract: A new computationally efficient filtering algorithm for the reconstruction of the first harmonic of a periodic signal is presented. The algorithm allows the recovery of the combustion quality information from the engine speed measurements that are noise contaminated. The algorithm is verified by using a spark ignition V8 engine in the torque estimation problem.

Method and device for controlling the current in a spark plug

Abstract: The present invention relates to a method of controlling the spark current in a spark plug ( 8 ), comprising a voltage source ( 1; 14 ), an ignition system ( 2 ) connected to the voltage source, and a spark plug ( 8 ) connected to the ignition system, which ignition system ( 2 ) comprises an ignition coil ( 3 ) and at least one regulating unit ( 5, 6 ) as well as a control unit ( 4 ), enabling control of the intensity and/or duration of the spark current, said ignition coil ( 3 ) comprising a secondary side ( 6, 31 ) arranged to be controlled in order to control the duration of the spark in Arc Discharge Mode. The invention also relates to an ignition device.

LIBS system and method for engine exhaust monitoring

Abstract: A trace species detection System for engine health monitoring, the system including a laser (32) for generating a laser beam (34), and optics for focusing the laser beam into an exhaust plume of an engine for thereby creating a spark in the exhaust plume. The System further includes spectral analysis instrumentation (40) for detecting light emissions from the spark, and statistical processing instrumentation (100) for analyzing data from the spectral analysis instrumentation (40) for thereby identifying and quantifying specific particles within a volume of the spark. The invention also provides a method of monitoring the health of an engine, the method including generating a laser beam, focusing the laser beam into an exhaust plume of the engine for thereby creating a spark in the exhaust plume, detecting light emissions from the spark, and analyzing data from the detection for thereby identifying and quantifying specific particles within a volume of the spark.

Development of an Open Path Laser Ignition System for a Large Bore Natural Gas Engine: Part 2 — Single Cylinder Demonstration

Abstract: Using a laser, as opposed to a conventional (electrical) spark plug, to create a combustion initiating spark is potentially advantageous for several reasons: flexibility in choosing and optimizing the spark location, in particular to move the spark away from solid heat sinks; production of a more robust spark containing more energy; and obviation of electrode erosion problems. In this paper we present the on-engine test results of the laser ignition system on a large bore natural gas engine. Test results include: mass fraction burn duration, hydrocarbon emissions data, and combustion stability comparisons to the conventional spark plug ignition system. Design and spark location considerations for the laser ignition system were presented in the first paper of this two-paper series.Copyright © 2005 by ASME

Fiber optic spark plug sensor for UV-LIF measurements close to the ignition spark

Abstract: Time-resolved observation of the fuel/air mixing process prior to ignition is crucial for the development of modern internal combustion engine concepts. The presented fiber optic sensor is designed for the acquisition of in-cylinder data in the area close to the ignition spark, based on UV-laser-induced fluorescence of organic fuel compounds. Excitation and fluorescence light are separately guided through silica fibers. The detection volume is defined by the optical design of the sensor head. Since the related components are completely integrated into a modified spark plug, the sensor can be applied to unmodified production line engines. We present the fundamental spectroscopic concept, the solution for the minimal invasive access through the spark plug and tracer spectra measured with a prototype.

Method and system for creation of fireworks and laser show by generating effects of laser-material interaction

Abstract: The invention discloses a method and system for creation of fireworks and laser show by generating effects of laser-material interaction and in particular by generating laser-induced breakdowns. The fireworks have the following particulars: each spark can be created at the pre-set position; the time existing and brightness of each spark can be controlled; each spark can have desirable speed and the trajectory movement; the laser-induced fireworks can reproduce any desirable spark arrangement, in particular 2D, 3D images or an abstract pictures. A method for creation of a laser show is founded on the use of a combination of the effects accompanying the laser-induced breakdowns and other laser-material interaction phenomenon. A method discloses the laser show which uses of the inflated balloons having special shapes and characteristics needed for the production of the desirable visual effects generated by laser radiation. A system for creation of fireworks and laser show is also disclosed.