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Ignition biography, Ignition discography
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AtomRSSAdd to NewsburstAdd to NewsgatorAdd to My Yahoodel.For the band, see Re:ignition.Look up Ignition in
Wiktionary, the free dictionary.Ignition occurs when the heat produced by a reaction becomes sufficient to sustain a chemical reaction.The sudden change from a cold gas to a hot plasma in a plasma source is also called ignition.See also: Making fire
Other uses of ignition include:
in chemistry, it refers to heating a material to the point that it spontaneously combusts, or until it ceases to lose mass.Ignition may also refer to:
Ignition (song), a hip hop song by artist R.This disambiguation page lists articles associated with the same title.If an internal link led you here, you may wish to change the link to point directly to the intended article.This page was last modified on 21 April 2008, at 19:53.All text is available under the terms of the GNU Free Documentation License.It is best known in the field of internal combustion engines but also has other applications, e.The earliest internal combustion engines used a flame, or a heated tube, for ignition but these were quickly replaced by systems using an electric spark.Magneto systems
The simplest form of spark ignition is that using a magneto.Aircraft engines usually have multiple magnetos to provide redundancy in the event of a failure.Some older automobiles had both a magneto system and a battery actuated system (see below) running simultaneously to ensure proper ignition under all conditions with the limited performance each system provided at the time.Some magnetos include an impulse system, which spins the magnet quickly at the proper moment, making easier starting at slow cranking speeds.The Model T (built into the flywheel) differed from modern implementations by not providing high voltage directly at the output; the maximum voltage produced was about 30 volts, and therefore also had to be run through the spark coil to provide high enough voltage for ignition, as described above, although the coil would not "buzz" continuously in this case, only going through one cycle per spark.The timing of the spark was adjustable by rotating this mechanism through a lever mounted on the steering column.With the universal adaptation of electrical starting for automobiles, and the concomitant availability of a large battery to provide a constant source of electricity, magneto systems were abandoned for systems which interrupted current at battery voltage, used an ignition coil (a type of autotransformer) to step the voltage up to the needs of the ignition, and a distributor to route the ensuing pulse to the correct spark plug at the correct time.The first reliable battery operated ignition was developed by the Dayton Engineering Laboratories Co.Delco) and introduced in the 1910 Cadillac.This ignition was developed by Charles Kettering and was a wonder in its day.It consisted of a single coil, points (the switch), a capacitor and a distributor set up to allocate the spark from the ignition coil timed to the correct cylinder.The coil was basically an autotransformer set up to step up the low (6 or 12V) voltage supply to the high ignition voltage required to jump a spark plug gap.The points allow the coil to charge magnetically and then, when they are opened by a cam arrangement, the magnetic field collapses and a large (20KV or greater) voltage is produced.The capacitor is used to absorb the back EMF from the magnetic field in the coil to minimize point contact burning and maximize point life.The Kettering system became the primary ignition system for many years in the automotive industry due to its lower cost, higher reliability and relative simplicity.External to the distributor is the ignition coil, the spark plugs, and wires linking the spark plugs and ignition coil to the distributor.The engine operates contact breaker points, which interrupt the current to an induction coil (known as the ignition coil).For an ignition coil, one end of windings of both the primary and secondary are connected together.The other end of the primary is connected to the points within the distributor.The ignition firing sequence begins with the points (or contact breaker) closed.This steady current produces a magnetic field within the coil's core.This magnetic field forms the energy reservoir that will be used to drive the ignition spark.As the engine turns, so does the cam inside the distributor.The points ride on the cam so that as the engine turns and reaches the top of the engine's compression cycle, a high point in the cam causes the breaker points to open.This breaks the primary winding's circuit and abruptly stops the current through the breaker points.This rapid decay of the magnetic field induces a high voltage in the coil's secondary windings.The ignition coil's secondary windings are connected to the distributor cap.High performance engines with eight or more cylinders that operate at high r.Although the two ignition system halves are electrically independent, they typically share a single distributor which in this case contains two breakers driven by the rotating cam, and a rotor with two isolated conducting planes for the two high voltage inputs.This limit can be overcome by substituting for the breaker a pair of breakers that are connected electrically in parallel but spaced on opposite sides of the cam so they are driven out of phase.There are also advantages to this arrangement.However it is necessary to check periodically the maximum opening gap of the breaker(s), using a feeler gauge, since this mechanical adjustment affects the "dwell" time during which the coil charges, and breakers should be replaced when they have become pitted by electric arcing.This system was used almost universally until the late 1970s, when electronic ignition systems started to appear.Electronic ignition
The disadvantage of the mechanical system is the use of breaker points to interrupt the low voltage high current through the primary winding of the coil; the points are subject to mechanical wear where they ride the cam to open and shut, as well as oxidation and burning at the contact surfaces from the constant sparking.Electronic ignition (EI) solves these problems.In the initial systems, points were still used but they only handled a low current which was used to control the high primary current through a solid state switching system.Hall effect sensor, which responds to a rotating magnet mounted on a suitable shaft.The sensor output is shaped and processed by suitable circuitry, then used to trigger a switching device such as a thyristor, which switches a large current through the coil.The rest of the system (distributor and spark plugs) remains as for the mechanical system.The lack of moving parts compared with the mechanical system leads to greater reliability and longer service intervals.For older cars, it is usually possible to retrofit an EI system in place of the mechanical one.In some cases, a modern distributor will fit into the older engine with no other modifications.Other systems do away with the distributor as a timing apparatus and use a magnetic crank angle sensor mounted on the crankshaft to trigger the ignition at the proper time.After a while it became logical to combine the functions of fuel control and ignition into one electronic system known as an engine control unit.Digital electronic ignition modules can be designed as either capacitive discharge (CDI) or inductive discharge ignitions (IDI).Capacitive discharge digital ignitions store charged energy for the spark in a capacitor within the module that can be released to the spark plug at virtually any time throughout the engine cycle via a control signal from the microprocessor.Engine management
In an Engine Management System (EMS), electronics control fuel delivery, ignition timing and firing order.Primary sensors on the system are engine angle (crank or Top Dead Center (TDC) position), airflow into the engine and throttle demand position.The circuitry determines which cylinder needs fuel and how much, opens the requisite injector to deliver it, then causes a spark at the right moment to burn it.Early EMS systems used analogue computer circuit designs to accomplish this, but as embedded systems became fast enough to keep up with the changing inputs at high revolutions, digital systems started to appear.Other systems dispense with the distributor and coil and use special spark plugs which each contain their own coil (Direct Ignition).Such designs offer potentially much greater reliability than conventional arrangements.Turbine and jet engines
Turbine engines have a capacitor discharge ignition system using 1 or more igniter plugs, which are only used at startup or in case the combustor(s) flame goes out.This article needs additional citations for verification.All text is available under the terms of the GNU Free Documentation License.Ignition gives you the guaranteed service today's business environment demands.Ignition provides a cost effective, reliable, turnkey solution for business continuity and offsite data storage, reducing your risk via implementation of best industry controls and practices.Learn more about the advantages of choosing Ignition here.See our complete list of strategic partners.To gain access to our remote support please click on the button below.Let ignition create an innovative program for you, full of magical moments that will build a friendship for your brand!We offer high quality ignition coils for over 15 different makes of vehicles in North America.Purchase your ignition coil requirements with ease and confidence from Ignition Coils Online.Please contact us if you require wholesale or distributor pricing.Direct shipment or warehouse distribution is available.Please inquire if you do not see a product that you need.Thanks for visiting Ignition Coils Online.Road, Mason, Ohio 45040Phone: 513.Last updated March 24, 2007 10:14PM.To us, it's the spark of a relationship based on creativity, purpose,
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