DISTRIBUTORLESS IGNITION SYSTEMS Chapter 13

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DISTRIBUTORLESS IGNITION SYSTEMSChapter 13
CBC

• ENGINE PERFORMANCE
• SPRING QUARTER

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OPERATION of EI systems

• WASTE SPARK METHOD
• BOTH CYLINDERS GET SPARK SIMULTANEOUSLY
• ONE PLUG IS POSITIVE POLARITY AND THE OTHER IS
  NEGATIVE ALL THE TIME (requires 30 more voltage)
• COIL OUTPUT IS VERY HIGH

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TYPICAL DIS SYSTEM

• CONTROL MODULE
• CONTROLS TIMING AND SEQUENCING OF IGNITON COIL
  ACTION
• LIMITS DWELL TIME
• DIFFERENT SYSTEMS USE DIFFERENT REFERENCE SENSORS
  TO OBTAIN TIMING CONTROL

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SECONDARY CURRENT FLOW - SERIES CIRCUIT
405C
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TYPICAL COIL PACK
404C
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CYLINDER PAIRS
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IGNITION MODULE
406C

• SIMILAR TO TFI STYLE MODULE
• CONTROLS MORE THAN ONE COIL
• DEPENDS ON CID SIGNAL TO DETERMINE WHICH CYLINDER
  TO FIRE

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CRANKSHAFT SENSOR
409C
(CKP)
Measures crankshaft RPM
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CAMSHAFT SENSOR
410C
CID signal Turns one half speed of
crankshaft One signal per camshaft
revolution Determines 1 cylinder Synchronizes
Fuel Injectors
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CYLINDER I.D. AND SPOUT
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GM EI COIL OPERATION
PAGE 412 CLASS, FIG 13-12
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SPOUT SIGNAL (6 CYL ENG.)
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Look Mister, This aint Burger King, you get it
my way or you dont get it at all!