Post by Angus on Jul 21, 2011 16:52:28 GMT -5
Hi Guys. I have a technical question maybe someone can help me out with.
With regards to electronic ignition... getting away from light coils and frills and gimmicks, the primary thing a stator and rotary magnito (flywheel) does is provide a charge and a trigger signal to the CDI. The CDI stores up the charge and releases it to the coil when the trigger sends a signal. One charge and one trigger signal from the stator for each revolution of the magnito.
Bear with me here.
For a two stroke this works great. Each revolution of the magnito is one revolution of the crank and piston. The stator/CDI/coil fires once per revolution as the piston is reaching the top of the cylinder.
Here's where my theory falls apart. For four stroke engines the stator is still sending one charge and one trigger signal per revolution. The spark only needs to fire once every two revolutions. Does this mean a four stroke CDI has something built into it that discharges every other charge and trigger signal? Does it store the charge from two revolutions and only fire once every two revolutions? Or perhaps it actually fires every revolution but every other spark is wasted?
Looking for some hard facts here. Save your speculations for Stelaspeed. Thanks
With regards to electronic ignition... getting away from light coils and frills and gimmicks, the primary thing a stator and rotary magnito (flywheel) does is provide a charge and a trigger signal to the CDI. The CDI stores up the charge and releases it to the coil when the trigger sends a signal. One charge and one trigger signal from the stator for each revolution of the magnito.
Bear with me here.
For a two stroke this works great. Each revolution of the magnito is one revolution of the crank and piston. The stator/CDI/coil fires once per revolution as the piston is reaching the top of the cylinder.
Here's where my theory falls apart. For four stroke engines the stator is still sending one charge and one trigger signal per revolution. The spark only needs to fire once every two revolutions. Does this mean a four stroke CDI has something built into it that discharges every other charge and trigger signal? Does it store the charge from two revolutions and only fire once every two revolutions? Or perhaps it actually fires every revolution but every other spark is wasted?
Looking for some hard facts here. Save your speculations for Stelaspeed. Thanks
