ATASA 5 TH Study Guide Chapter 27 Pages 810 835 68 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 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?
Is there a career for me that melds 2 or more of my favorite clusters?
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
2. Ignition system designs are either distributor, (coil pack) or (coil on plug). Distribution, Indirect Distributor less, Direct Indirect, Coil Pack
2. Ignition system designs are either distributor, (coil pack) or (coil on plug).
2. Ignition system designs are either distributor, (coil pack) or (coil on plug).
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
4. Battery current is switched on by the to supply the primary circuit. Injection Switch Ignition Switch Capacitor Switch
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
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
7. The circuit carries the high voltage to the spark plugs. Base Primary Secondary
8. In a distributor system, the & deliver the sparks in the correct order. Cap & Rotor Cap & Reluctor Module & Rotor
9. EI systems, either wasted spark or direct, have firing current & spark duration. Higher, Longer Lower, Shorter Bigger, Faster
10. An ignition is a pulse that has two coils of wire wrapped around an iron core. Primary coil = 100 200 turns of AWG 20 wire. Secondary = 15,000 20,000 turns of very fine wire. Coil, Transformer Coil, Reluctor Coil, Armature
11. Iron or steel cores are used in ignition coils to reduce to magnetic lines of force. Resistance Reluctance Reactance
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
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
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
Resistance Reluctance Reactance
14. A coil with magnetism will have more potential to produce its designed voltage. Saturated Emulated Intimidated
15. Secondary coil windings are wound on the of the primary windings collapse inward. Inside Outside Middle
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
17. The spark plug is where high voltage causes the arc needed to ignite the A/F mix. Air Gap Air Rap Air Nap
18. on the insulator prevent electric arcing on the outside of the spark plug. Insulator Ribs Nibs Ribs Fibs
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
20. Thread (length) is crucial to properly position electrode gap in the combustion chamber. Reach Range Ranch
5.4 Liter Ford Triton V 8
21. As heat range goes, a cold plug has a nose and a hot plug has a insulator nose.
Longer Path for Heat to Flow before being Cooled Shorter Path for Heat to Flow before being Cooled
22. type spark plugs have a 5kΩ internal resistor used to suppress RFI. Radio Frequency Interference = Static Noise Reluctor Resistor Reactor
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
24. V groove, U groove & pin point designs require lower firing voltages. Electrode Thread Resistor
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
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
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
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
29. Metal detection sensors use pick up coils with instead of permanent magnets. Electromagnets Ribbon Magnets Horseshoe Magnets
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
31. Photoelectric sensors use diodes and photo transistors as triggers. Light Absorbing Light Emitting Light Duty
Note: Firing Order is the sequence in which the sparks occur that ignite the A/F mixture. (True Sparks or Event Sparks Only) http://img153.image shack.us/img153/18 3/mercedescorrecte dkk8.gif
Be able to sketch the spark plug wiring for a 4 cylinder, in line engine with a distributorless ignition system and a 1 3 4 2 firing order. 1 2 3 4 Note: Cylinder #1 and #4 are Companions Cylinder #2 and #3 are Companions
Sketch the spark plug wiring for a V 8 engine with a distributor in the rear of the engine, a clockwise rotation, a 1 8 4 3 6 5 7 2 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. 2 4 6 8 1 3 5 7
32. Adjusting the the spark happens is critical to efficient engine operation. Way Time Method
33. Ignition timing is specified by relating the position of # piston to degrees of crank rotation. #1 #4 #8
34. Spark timing that is called 0 occurs at exactly at the end of the stroke. BDC, Compression TDC, Power TDC, compression
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
36. Distributors may contain an integral as well as an integral. Coil, Module Coil, Advance Coil, PCM
37. Distributorless (EI) systems are either spark or overcylinder designs. Wasted, Coil Wasted, Plug Wasted, Valve
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
39. On spark (double ended coils), one coil is connected in series with two spark plugs. Wasted Direct True
40. cylinders fire simultaneously, 1 on compression (event) and 1 on exhaust stroke (waste). 2 4 6
41. Coil per cylinder ignition (direct) can be coil plug or coil plug. Coil on Plug Coil near Plug
42. On any and every ignition system design, timing at each cylinder can be individually changed for maximum performance. True or False
43. Some engines have 2 spark plugs per cylinder. True or False
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.
45. Engine position sensors used for spark triggering can also be used to detect. Mileage Misfire Emissions
Crankshaft Toner Ring
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
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?