169:(Left) In a vibrator coil, points open and close rapidly, creating pulsating DC, or interrupted battery current. Electrical current flows from the battery through R1, vibrator points V1, and coil L2. The energized coil L2 opens vibrator points V1, interrupting the current flow through L2. The magnetic field about L2 collapses, and vibrator points V1 close again. Once more, current flows through L2, and again V1 vibrator points open. This process is repeated continuously, creating a "shower of sparks." (Right) Booster coil components. The booster coil is separate from the magneto and can generate a series of sparks on its own. Current flow through the primary coil sets up a magnetic field about the coil that attracts the movable contact point, breaking circuit is broken. The movable contact point then moves back to the stationary contact point via a spring. This sets up the current flow once again in a repetitive process.
249:
138:. Voltage across the primary coil results in a proportional voltage being induced across the secondary winding of the coil. The turns ratio between the primary and secondary coil is selected so that the voltage across the secondary reaches a very high value, enough to arc across the gap of the spark plug. As the voltage of the primary winding rises to several hundred volts, the voltage on the secondary winding rises to several tens of thousands of volts, since the secondary winding typically has 100 times as many turns as the primary winding.
152:
176:
shaft. The impulse coupling uses a spring, a hub cam with flyweights, and a shell. The hub of the magneto rotates while the drive shaft is held stationary, and the spring tension builds up. When the magneto is supposed to fire, the flyweights are released by the action of the body contacting the trigger ramp. This allows the spring to unwind giving the rotating magnet a rapid rotation and letting the magneto spin at such a speed to produce a spark.
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161:
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Because the magneto has low voltage output at low speed, starting an engine is more difficult. Therefore, some magnetos have an impulse coupling, a spring-like mechanical linkage between the engine and magneto drive shaft which "winds up" and "lets go" at the proper moment for spinning the magneto
223:. Ignition magnetos were soon used on most cars, for both low voltage systems (which used secondary coils to fire the spark plugs) and high voltage magnetos (which fired the spark plug directly, similar to
257:(Left) Aircraft dual ignition system with two individual magnetos, separate sets of wires, and spark plugs, increases reliability. (Right) Bosch magneto circuit diagram from 1911.
192:, and his staff of Arnold Zähringer, Young Rall, and Gottlob Honold, in developing the first practical high-tension magneto. In 1900, the Bosch magneto ignition was used in the
509:
280:
Magnetos for
Automobilists, how Made and how Used: A Handbook of Practical Instruction in the Manufacture and Adaptation of the Magneto to the Needs of the Motorist
248:
323:
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231:
once batteries became common in cars, since a battery-operated coil can provide a high-voltage spark even at low speeds, making starting easier.
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As the points begin to open, point spacing is initially such that the voltage across the primary coil would arc across the points. A
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112:, which converts the electricity to a higher voltage (with the trade-off being a corresponding reduction in the output
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of the primary coil, and slows the rise time of the primary winding voltage to allow the points to open fully.
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134:. The ratio of turns in the secondary winding to the number of turns in the primary winding, is called the
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A second coil, with many more turns than the primary, is wound on the same iron core to form an electrical
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92:(an electrical generator using permanent magnets) is able to produce relatively low
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electricity, however it is unable to produce the high voltages required by a
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is placed across the points which absorbs the energy stored in the
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424:. New York: Henry Holt and Company. pp. 102–107, 124–126.
529:
203:
The first car to use magneto ignition was the 1901 German
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ignition). Ignition magnetos were largely replaced by
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Impulse coupling, induction vibrator, and booster coil
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207:racing car, followed by various cars produced by
468:Hillier's Fundamentals of Automotive Electronics
443:
441:
322:. Continental Ignition Systems. 31 August 2011.
503:
375:
373:
371:
301:Aero Engines: for Pilots and Ground Engineers
8:
76:. The older term "high-tension" means "high-
100:as used in most modern engines (aside from
510:
496:
488:
576:Crankcase ventilation system (PCV valve)
422:Robert Bosch: His Life and Achievements
269:
72:to make pulses of high voltage for the
326:from the original on 18 September 2015
188:collaborated with the German engineer
7:
184:In the late 1890s, English engineer
64:(such as petrol engines). It uses a
27:Part of an engine's ignition system
453:Cars: Early and Vintage, 1886-1930
25:
384:. New York: Glencoe. p. 180.
356:from the original on 9 July 2017
346:"Capacitors in Ignition Systems"
247:
238:
159:
150:
678:Overhead valve (pushrod) layout
470:. Nelson Thornes. p. 167.
397:Automotive Electrical Equipment
277:Bottone, Selimo Romeo (1907).
1:
108:also includes an electrical
44:Impulse coupling components.
455:. London: Grange-Universal.
1188:
519:Internal combustion engine
466:Hillier, V. A. W. (1996).
1136:
987:Diesel particulate filter
939:Idle air control actuator
880:Engine control unit (ECU)
525:
1052:Viscous fan (fan clutch)
964:Throttle position sensor
673:Overhead camshaft layout
591:Core plug (freeze plug)
420:Heuss, Theodor (1994).
380:Kroes, Michael (1995).
186:Frederick Richard Simms
320:"The Aircraft Magneto"
299:Cauldwell, O. (1941).
283:. C. Lockwood and son.
62:spark-ignition engines
56:) is an older type of
45:
37:
1172:Electrical generators
303:. Pitman. p. 88.
43:
35:
832:Compression ignition
399:. Tata McGraw-Hill.
395:Kohli, P.L. (1993).
382:Aircraft Powerplants
54:high-tension magneto
982:Catalytic converter
36:Magneto components.
1108:Knocking / pinging
700:Combustion chamber
125:leakage inductance
46:
38:
1154:
1153:
1123:Stratified charge
890:Electrical system
872:Engine management
705:Compression ratio
645:Starter ring gear
544:rotating assembly
16:(Redirected from
1179:
1167:Ignition systems
997:Exhaust manifold
862:Spark plug wires
748:Boost controller
735:Forced induction
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350:www.smokstak.com
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194:Gottlieb Daimler
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106:ignition magneto
50:ignition magneto
21:
18:Impulse coupling
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685:Tappet / lifter
668:Flathead layout
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196:engines on the
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58:ignition system
52:(also called a
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229:ignition coils
225:induction coil
205:Mercedes 35 hp
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102:diesel engines
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1030:Water cooling
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1007:Oxygen sensor
1005:
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922:Intake system
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913:Starter motor
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852:Ignition coil
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784:Petrol engine
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779:Diesel engine
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743:Blowoff valve
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660:Cylinder head
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551:Balance shaft
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477:0-7487-2695-0
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406:0-07-460216-0
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63:
59:
55:
51:
42:
34:
30:
19:
1037:Electric fan
837:Coil-on-plug
826:
763:Turbocharger
758:Supercharger
630:Main bearing
620:Firing order
610:Displacement
556:Block heater
540:Engine block
528:Part of the
527:
467:
461:
452:
421:
415:
396:
390:
381:
358:. Retrieved
349:
340:
328:. Retrieved
300:
279:
272:
202:
190:Robert Bosch
183:
174:
135:
129:
118:
105:
87:
53:
49:
47:
29:
1061:Lubrication
1025:Air cooling
842:Distributor
794:Fuel filter
772:Fuel system
753:Intercooler
720:Timing belt
710:Head gasket
640:Piston ring
217:Turcat-Mery
136:turns ratio
132:transformer
110:transformer
74:spark plugs
70:transformer
1161:Categories
1113:Power band
1073:Oil filter
1047:Thermostat
992:EGT sensor
954:MAF sensor
949:MAP sensor
934:Air filter
898:Alternator
857:Spark plug
789:Carburetor
715:Rocker arm
655:Valvetrain
586:Crankshaft
530:Automobile
431:0805030670
264:References
221:Nesseldorf
98:spark plug
847:Glow plug
809:Fuel tank
804:Fuel pump
571:Crankcase
121:capacitor
88:A simple
1146:Category
1091:Dry sump
1087:Wet sump
1078:Oil pump
1042:Radiator
959:Throttle
819:Ignition
690:Camshaft
615:Flywheel
596:Cylinder
581:Crankpin
451:(1985).
354:Archived
324:Archived
198:Zeppelin
60:used in
1118:Redline
1002:Muffler
903:Battery
827:Magneto
330:21 June
180:History
114:current
94:voltage
90:magneto
78:voltage
66:magneto
1141:Portal
929:Airbox
908:Dynamo
635:Piston
625:Stroke
604:layout
532:series
474:
428:
403:
219:, and
104:). An
84:Design
68:and a
1101:Other
725:Valve
695:Chest
360:6 May
1083:Sump
600:bank
561:Bore
472:ISBN
426:ISBN
401:ISBN
362:2018
332:2016
213:Mors
209:Benz
1068:Oil
657:and
542:and
116:).
80:".
48:An
1163::
1089:,
602:,
440:^
370:^
352:.
348:.
309:^
289:^
215:,
211:,
200:.
1093:)
1085:(
606:)
598:(
511:e
504:t
497:v
480:.
434:.
409:.
364:.
334:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
