ATASA 5 th. ATASA 5 TH Study Guide Chapter 27 Pages Ignition Systems 68 Points. Please Read the Summary

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1 ATASA 5 TH Study Guide Chapter 27 Pages Points Please Read the Summary

Before We Begin Keeping in mind the Career Cluster of Transportation, Distribution & Logistics Ask yourself: What careers might be present in this slide

2 Before We Begin Keeping in mind the Career Cluster of Transportation, Distribution & Logistics Ask yourself: What careers might be present in this slide series? What careers might interest me? How do these careers relate to my other high school classes? What career cluster is my 4 year plan preparing me for?

3 Is there a career for me that melds 2 or more of my favorite clusters?

4 1. The system provides the properly timed, high voltage surges to ignite the A/F mixture in the cylinders. Improper ignition affects fuel economy, performance & emissions. Injection Ignition Control

5 2. Ignition system designs are either distributor, (coil pack) or (coil on plug). Distribution, Indirect Distributor less, Direct Indirect, Coil Pack

6 2. Ignition system designs are either distributor, (coil pack) or (coil on plug).

7 2. Ignition system designs are either distributor, (coil pack) or (coil on plug).

8 3. The circuit is the low voltage circuit and the is the high voltage ignition system circuit. The primary is also the low resistance coil & secondary the high resistance coil. Secondary, Primary Coil, Distributor Primary, Secondary

12 4. Battery current is switched on by the to supply the primary circuit. Injection Switch Ignition Switch Capacitor Switch

surge is generated (induced) & then sent to the plugs.

13 5. When the field in the primary ignition coil through the secondary ignition coil windings, a high voltage surge is generated (induced) & then sent to the plugs. Energetic, Collapses Magnetic, Collapses Magnetic, Relapses

14 6. Older ignition systems used a resistor or a calibrated resistance wire to act as a voltage drop in the primary circuit, limiting full charging voltage from reaching the primary coil. Ask about the Start & Run Circuits Ballast RFI Variable

15 7. The circuit carries the high voltage to the spark plugs. Base Primary Secondary

16 8. In a distributor system, the & deliver the sparks in the correct order. Cap & Rotor Cap & Reluctor Module & Rotor

18 9. EI systems, either wasted spark or direct, have firing current & spark duration. Higher, Longer Lower, Shorter Bigger, Faster

19 10. An ignition is a pulse that has two coils of wire wrapped around an iron core. Primary coil = turns of AWG 20 wire. Secondary = 15,000 20,000 turns of very fine wire. Coil, Transformer Coil, Reluctor Coil, Armature

20 11. Iron or steel cores are used in ignition coils to reduce to magnetic lines of force. Resistance Reluctance Reactance

22 12. is the name given to the length of time the primary current flows in order to saturate the coil primary windings with magnetic fields. often now just called coil saturation time. Saturation Dwell Duration

23 12. is the name given to the length of time the primary current flows in order to saturate the coil primary windings with magnetic fields. often now just called coil saturation time. Saturation Dwell Duration

24 13. is the term used to describe temporary resistance to current flow in the primary coil caused by magnetic field interference. This is the F in LSMFT (5 causes of resistance in a path). Resistance Reluctance Reactance

25 Resistance Reluctance Reactance

26 14. A coil with magnetism will have more potential to produce its designed voltage. Saturated Emulated Intimidated

27 15. Secondary coil windings are wound on the of the primary windings collapse inward. Inside Outside Middle

28 16. The difference between the voltage required to the plugs and the maximum voltage, is called secondary reserve voltage. This reserve is designed to prevent misfire under load. Fire, Output Fire, Input Fire, Battery

29 17. The spark plug is where high voltage causes the arc needed to ignite the A/F mix. Air Gap Air Rap Air Nap

30 18. on the insulator prevent electric arcing on the outside of the spark plug. Insulator Ribs Nibs Ribs Fibs

31 19. Spark plugs have either an mm or a 14 mm diameter thread sealed with either a steel washer or a tapered seat. Tightening specs differ depending upon the sealing method used. 1 mm 18 mm 25 mm

32 20. Thread (length) is crucial to properly position electrode gap in the combustion chamber. Reach Range Ranch

34 5.4 Liter Ford Triton V 8

35 21. As heat range goes, a cold plug has a nose and a hot plug has a insulator nose.

36 Longer Path for Heat to Flow before being Cooled Shorter Path for Heat to Flow before being Cooled

37 22. type spark plugs have a 5kΩ internal resistor used to suppress RFI. Radio Frequency Interference = Static Noise Reluctor Resistor Reactor

39 23. The used in electrode construction determine a spark plug s longevity, power & efficiency. Electrode materials include copper nickel alloys, platinum, iridium, and yttrium. Materials Processes Designs

40 24. V groove, U groove & pin point designs require lower firing voltages. Electrode Thread Resistor

41 25. Television & Radio Suppression (TVRS) plug wiring uses carbon impregnated cores without actual wire inside. This is done to lower RFI & EMI. Fiber Rope Steel

42 26. Electronic ignition systems switch the current on & off using an NPN transistor. The emitter is connected to ground, the collector to the coil negative terminal & the base is switched with a triggering device to interrupt (switch) the ground side of the primary coil. Primary Secondary Base

43 27. Sensors, like the CKP & CMP, are used to trigger the NPN. These sensors can be pulse generators, sensors, sensors & metal detection sensors. Magnetic, Hall Effect, Optical Reluctant, Hall Effect, Optical Reactant, Hall Effect, Optical

44 28. Magnetic pulse generators consist of a coil & a trigger wheel called a. These are also known as PM generators because they contain permanent magnets. Pick up, Reactor Pick up, Reluctor Pick up, Resistor

45 29. Metal detection sensors use pick up coils with instead of permanent magnets. Electromagnets Ribbon Magnets Horseshoe Magnets

46 30. The Hall effect sensor is the most popular type of engine position sensor due to its voltage signal throughout the entire engine rpm range and its ability to produce a square wave. Average Inaccurate Accurate

47 31. Photoelectric sensors use diodes and photo transistors as triggers. Light Absorbing Light Emitting Light Duty

49 Note: Firing Order is the sequence in which the sparks occur that ignite the A/F mixture. (True Sparks or Event Sparks Only) shack.us/img153/18 3/mercedescorrecte dkk8.gif

50 Be able to sketch the spark plug wiring for a 4 cylinder, in line engine with a distributorless ignition system and a firing order Note: Cylinder #1 and #4 are Companions Cylinder #2 and #3 are Companions

51 Sketch the spark plug wiring for a V 8 engine with a distributor in the rear of the engine, a clockwise rotation, a firing order, with cylinder #1 up front on the driver s side, odd # ed cylinders on the driver s side, & #1 plug wire located at 6 o clock on the distributor

52 32. Adjusting the the spark happens is critical to efficient engine operation. Way Time Method

53 33. Ignition timing is specified by relating the position of # piston to degrees of crank rotation. #1 #4 #8

54 34. Spark timing that is called 0 occurs at exactly at the end of the stroke. BDC, Compression TDC, Power TDC, compression

57 35. Both sensitive (vacuum) and sensitive (mechanical) devices have been used to change the timing of the spark. The PCM uses MAP (load) CKP (speed) sensors as timing inputs. Load, RPM Load, Speed Load, Torque

58 36. Distributors may contain an integral as well as an integral. Coil, Module Coil, Advance Coil, PCM

59 37. Distributorless (EI) systems are either spark or overcylinder designs. Wasted, Coil Wasted, Plug Wasted, Valve

60 38. EI systems eliminate parts that caused resistance & needed maintenance, reduced, increased time for saturation, allow individual control of cylinders, and operate cooler. Cost, Coil Misfire, Plug Cost, Fuel

61 39. On spark (double ended coils), one coil is connected in series with two spark plugs. Wasted Direct True

63 40. cylinders fire simultaneously, 1 on compression (event) and 1 on exhaust stroke (waste)

64 41. Coil per cylinder ignition (direct) can be coil plug or coil plug. Coil on Plug Coil near Plug

65 42. On any and every ignition system design, timing at each cylinder can be individually changed for maximum performance. True or False

66 43. Some engines have 2 spark plugs per cylinder. True or False

67 44. Some engines can fire multiple sparks from the same spark plug on one stroke. True or False HYFIRE VI IGNITION SYSTEM CD Multi Strike CD Ignition Features At A Glance: State of the art digital circuitry with 4 times faster processing. Boost proportional retard capability with optional harness. 2 stage rev limiting in 100 RPM increments. Automatic start retard circuit for easier starting. Built in RPM Window Switch which is great for nitrous oxide. Easy to use digital display with push button controls. Great for supercharged, turbocharged and nitrous applications. Primary Output Voltage: 525, Secondary Voltage Output: 45000, Spark Energy: 137mj.

68 45. Engine position sensors used for spark triggering can also be used to detect. Mileage Misfire Emissions

69 Crankshaft Toner Ring

70 46. Spark timing corrections are made to engines in an effort to compensate or correct or adapt for: coolant TEMPERATURE stabilizing engine IDLE TRANSITION correction engine KNOCK EGR operation TORQUE control TRACTION control correction

72 Now that we re through Keeping in mind that Career Clusters sensibly link education to careers Ask yourself: What careers could be linked to the topics in this slide series? Which of those careers might interest me? How do career clusters relate to my other high school classes? Do I need to change my 4 year plan to fit my desired career?

Ignition System Fundamentals

Ignition System Fundamentals Chapter 37 Objectives Describe the functions of ignition system parts Explain the operation of points, electronic, and computer ignition systems Give an overview of the different