The ASE A8 Distributor less Ignition system is no different than those on a vehicle that has a distributor.
The Electrical energy on a Distributor or Distributor less is neither created nor destroyed, only converted or transferred.
This understanding will give a basic concept how the flow of current from a point of negative potential to a point of positive potential. Yes wrap your head around it, this is exactly how DIS systems work, confusing I know.
Current flows from negative to positive, it does not flow from positive to negative on a Distributor less Ignition system, at least this is how I learned it.
The polarity of the primary and secondary are fixed and never changes. The cylinder head is electrically neutral and serves as a big capacitor for the secondary circuit.
As the secondary windings are mutually charged from the primary windings, there will be an excess of electrons gather at the negative end of the coil, while a deficiency of electrons exist on the positive at the positive side of the secondary windings. When enough voltage is establish a firing event occurs.
This firing event will fire two plugs, one from negative to positive polarity and the other from positive to negative. On many vehicles and the ASE A8 Distributor less ignition system this is know as the waste spark ignition system, there is one ignition coil for every two cylinders.
Since both plugs fire at the same time, one cylinder will be on the compression stroke while the other cylinder is on the exhaust stroke.
When you observe this ignition pattern on the ignition scope, the event (compression) stroke will show higher voltage requirement and the waste event (exhaust) will be lower.
On the ASE A8 Distributor less ignition system will have 1 coil (type 1) or multiply coils (type 2), along with a pickup coil for crank position and a pickup coil for the cam position sensor for identifying number 1 cylinder.
ASE A8 CERTIFICATION: Distributorless Ignition
Note the crank sensor could also be a Hall effect type sensor for the crank and cam sensor.
ASE A8 DISTRIBUTOR LESS IGNITION CRANK AND CAM SENSOR
The variable reluctance sensor which replaces the Hall effect on some vehicles for the crank senor is a magnetic pick up device that is used for some Distributor less Ignition systems. This sensor sends a high data rate to the Ignition module or PCM for crank position. Because of this data rate the module or PCM knows where the crank shaft position is at any given point.
The crank sensor provides the module or PCM module with information on the crankshaft speed and location.
The camshaft sensor provides an input to the ignition ,module or pcm for #1 cylinder on the compression stroke. Both the cam and crank sensors are used togehter by the PCM to calculate ignition timing and injector firing.
The distributorless ignition system sensors are located near the camshaft, crankshaft or crankshaft pulleys
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